CN108423728A - A kind of thermal wastewater concentration systems that air Natural Circulation water is in line and method - Google Patents
A kind of thermal wastewater concentration systems that air Natural Circulation water is in line and method Download PDFInfo
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- CN108423728A CN108423728A CN201810234628.6A CN201810234628A CN108423728A CN 108423728 A CN108423728 A CN 108423728A CN 201810234628 A CN201810234628 A CN 201810234628A CN 108423728 A CN108423728 A CN 108423728A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000012141 concentrate Substances 0.000 claims abstract description 25
- 238000004821 distillation Methods 0.000 claims abstract description 24
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000012159 carrier gas Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 80
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000000779 smoke Substances 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 238000007791 dehumidification Methods 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 description 36
- 230000023556 desulfurization Effects 0.000 description 36
- 238000005516 engineering process Methods 0.000 description 18
- 238000002425 crystallisation Methods 0.000 description 9
- 230000008025 crystallization Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000003009 desulfurizing effect Effects 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000012153 distilled water Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000001223 reverse osmosis Methods 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/14—Evaporating with heated gases or vapours or liquids in contact with the liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- 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
- B01D53/002—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 by condensation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of thermal wastewater concentration systems that air Natural Circulation water is in line and methods, the system and method enter using air as carrier gas from the air inlet of distillation and concentration tower, the thermal wastewater convection current that preheated device preheating under being sprayed in distillation and concentration tower and from distillation and concentration tower upper end, heat exchanger heat, useless water part moisture is taken away by air, respectively obtains wet saturated air and Waste water concentrating liquid；After the wet preheated device phase-change heat-exchange of saturated air, vapor therein condenses to form condensed water and dehumidified air, which enters air inlet unit Natural Circulation, and the Waste water concentrating liquid that condensed water and concentrate are collected in cone bucket discharges naturally.
Description
Technical field
The present invention relates to field of waste water treatment, are related to the concentration decrement of waste water, and in particular to a kind of air Natural Circulation water
In line thermal wastewater concentration systems and the waste water airdistillation method for concentration based on the system, the waste water can be useless for desulfurization
Water.
Background technology
Desulfurization wastewater Zero discharging system generally comprises pretreatment unit, concentration decrement unit, end solidified cell three parts.
Currently, the concentration Decrement Technique used both at home and abroad mainly has thermal concentration (such as：MVC/MED be concentrated by evaporation), film concentration
(such as：RO high pressures are reverse osmosis, the positive osmosis concentrations of FO).
MVC/MED thermal concentration technologies：Can by desulfurization wastewater pre-process production water be concentrated into the ppm of TDS≤200,000, be primarily present with
Lower problem：1) all to use price with waste water part of appliance since high salinity waste water has stronger corrosivity
High metal material, it is higher to cause equipment cost；2) since steam and waste water heating surface are of crucial importance, if heat exchange surface
Fouling is formed, then system performance will substantially reduce, therefore requirement of the technology to Wastewater Pretreatment is also very high；3) waste water salt
When degree is higher, the corresponding elevation of boiling point is also higher (such as sodium chloride solution under the conditions of saturated concentration the elevation of boiling point up to 13 DEG C), steams
It is not high to send out the efficiency of concentration technique at this time, operating cost is caused to increase.Therefore, generally existing investment, operation and maintenance cost are high, account for
The problems such as ground area is big, equipment scaling seriously corroded.
Film concentration technique：Desulfurization wastewater can be pre-processed production water difference by FO just infiltration and RO high pressure reverse osmosis concentration technologies
The ppm of the ppm of TDS≤180,000 and TDS≤100,000 are concentrated into, it is dense that investment and operation and maintenance cost, floor space are slightly below MVC/MED heat
Contracting technology, 1) membrane component dirt is stifled in order to prevent, higher to the pre-processing requirements of waste water, to increase pretreated investment and
O＆M expense；2) membrane component constantly deteriorates in operational process, needs periodic cleaning and replacement, increases operation expense；3)
It is limited by membrane technology, the cycles of concentration of waste water is relatively low, and concentrated water drainage is higher than MVC/MED thermal concentration technologies, increases end
Processing is (such as：Evaporative crystallization etc.) investment and O＆M expense；4) generally existing membranous system cleans the difficult, cleaning frequency and uses the longevity
The problems such as ordering short, anti-load impact energy force difference.
Invention content
The purpose of the present invention is to overcome the deficiency in the prior art, and it is dense to provide a kind of thermal wastewater that air Natural Circulation water is in line
Compression system and waste water airdistillation method for concentration based on the system, which can be desulfurization wastewater.
The above-mentioned purpose of the present invention is achieved by following technical solution：
A kind of thermal wastewater airdistillation concentration systems that air Natural Circulation water is in line, including air inlet unit, waste water
Feed liquor unit and distillation and concentration tower further include waste water heating unit；
The lower part of the distillation and concentration tower is equipped with air inlet, and bottom is equipped with concentrate and collects cone bucket, and top is equipped with humid air
Outlet；
The air inlet unit includes air cleaner and wind turbine, and air passes through air cleaner, wind turbine from steaming successively
The air inlet for evaporating concentration tower enters tower body；
The waste water feed liquor unit includes waste water input duct, and one end of the pipeline enters tower from the top of distillation and concentration tower
Body is simultaneously downwardly open, and the other end is waste water inlet；The waste water heating unit includes the preheating being set in waste water input duct
Device and heat exchanger, preheated device and heat exchanger heating enter tower body to waste water successively；
The preheater also with the humid air outlet of distillation and concentration tower, enters after the preheated device dehumidification by condensation of humid air
Air inlet unit Natural Circulation；The heat exchanger is also connected to for the heat source that waste water heats；
The concentrate collects cone bucket and is equipped with drain valve and positive displacement pump, and concentrate is through drain valve and positive displacement pump direct emission.
Further, the airdistillation concentration systems further include be set to tower body air inlet at air inlet modulating mechanism and
Bleed modulation mechanism set on tower body humid air exit；
The air inlet modulating mechanism include inlet gas distributed modulation device and it is multiple be set to inlet gas distributed modulation device under
Side is for the entrance guiding plate by horizontal gas flow guiding for uprush；The bleed modulation mechanism includes that exit gas distribution is adjusted
Device processed and multiple outlet deflectors above exit gas distributed modulation device for guiding uprush as horizontal gas flow；
The inlet gas distributed modulation device, exit gas distributed modulation device respectively include intermediate modulation axis body and are set to
Modulate the modulation blade of axis body surrounding；The centre of the modulation axis body of inlet gas distributed modulation device is cylinder, and both ends are semicircle
Sphere or cone；The modulation axis body of exit gas distributed modulation device is the cylinder that a lower end is semicircle sphere or cone；
The modulation blade is set to the lower end of cylinder, including multiple be in tilted layout is used in cylinder circumferential direction by vertical ascent gas
Stream is modulated into the blade of spinning updraft；
The exit gas distributed modulation device is located at the vertical direction of inlet gas distributed modulation device.
Further, the entrance guiding plate or outlet deflector respectively by horizontal segment, vertical section and by horizontal segment and
Vertical section connects the segmental arc composition of transition.
Further, stirrup and outer stirrup are equidistantly circumferentially fixed in the modulation vanes and are set in gas distribution and adjust
The lower end of the cylinder of device processed.
Further, the modulation axis body is hollow structure.
Further, the waste water input duct is located in tower body and downwardly open one end is equipped with atomizer.
Further, heat source is hot water, steam or heat smoke.
A kind of waste water airdistillation method for concentration using above system：It is carrier gas from the air inlet of distillation and concentration tower using air
Mouth enters, the thermal wastewater of the preheating of preheated device, heat exchanger heating under being sprayed in distillation and concentration tower and from distillation and concentration tower upper end
Convection current, useless water part moisture are taken away by air, respectively obtain wet saturated air and Waste water concentrating liquid；The wet saturated air is through pre-
After hot device phase-change heat-exchange, vapor therein condenses to form condensed water and dehumidified air, which enters air inlet list
The Waste water concentrating liquid that first Natural Circulation, condensed water and concentrate are collected in cone bucket discharges naturally.
Further, the heat source of heat exchanger is heat smoke before deduster.
General principles (by taking desulfurization wastewater as an example)：Not using saturated moist air water content under different temperatures, pressure
With (such as：90 DEG C of saturated air water capacities are 1400g water/kg dry air；And 25 DEG C of saturated air water capacities are the dry skies of 20g water/kg
Gas), desulfurization wastewater pretreated water is made using filler tower and is modulated into cyclone flow patterns【Note：Enhance heat and mass】Dry air
It is in direct contact, with the raising of temperature【Note：Heat source is from hydraulic fluid side (through 120-150 DEG C of heat smoke or hot water before plant dust catcher
Or after steam heating≤100 DEG C of desulfurization wastewater pretreated waters)】, saturated moist air have it is higher partial pressure and it is higher aqueous
Amount, the concentration of be humidified by the dry air evaporation and salinity of realizing desulfurization wastewater pretreated water.The height of discharge packed tower is had enough to eat and wear
Desulfurizing tower is discharged into as sulfur removal technology moisturizing after heat exchanger recycling heat preheating desulfurization wastewater with humid air, and production water can reach steaming
Distilled water water quality, is better than《GB/T19923-2005》Technical standard.Airdistillation concentrate is used for coal-burning power plant's dry ash slag damping
Or drain into end solidified cell and carry out curing process, to realize Desulphurization for Coal-fired Power Plant wastewater zero discharge.
In above-mentioned technical proposal, normal temperature air enters tower body from air inlet, with spinning updraft and atomization in tower
Thermally desulfurizing concentrates waste water convection current, and the desulfurization concentration waste water by concentration enters concentrate and collects cone bucket, carries the wet saturation of moisture
Air is exported from humid air and is discharged.Air cleaner is used for air filtration, and wind turbine is used to provide power for air.Preheater one
The heat that aspect is used to collect humid air tentatively preheats desulfurization wastewater, on the other hand carries out dehumidification by condensation to humid air, this is cold
Condensate is recycled up to distilled water water quality, and the air of dehumidifying continues with from air inlet, avoids discharging exhaust gas into air.
For heat exchanger for being further heated to required temperature to the desulfurization wastewater of preheating, the heat source that heat is provided for heat exchanger can be heat
Water, steam or the heat smoke of power plant.In order to reduce tower height, equipment investment and occupied space are reduced, needs raising airdistillation dense
Contracting efficiency, air inlet modulating mechanism and bleed modulation mechanism can play this effect.Inlet gas distributed modulation device, exit gas
Distributed modulation device respectively includes intermediate modulation axis body and the modulation blade set on modulation axis body surrounding.Exit gas distributed modulation
Device is located at the vertical direction of inlet gas distributed modulation device, is all located on the center line of tower body；Entrance guiding plate is in vertical direction
It is upper to be located at below inlet gas distributed modulation device, face air intake pipe in horizontal direction；Deflector is exported in vertical direction
It is upper to be located above exit gas distributed modulation device, face air exhaust pipeline in horizontal direction；Air enters from admission line to be blown
It is vertical fluidised form to be guided to entrance guiding plate by horizontal fluidised form, then blows to inlet gas distributed modulation device by vertical ascent fluidised form tune
It is made as blowing to exit gas distributed modulation device, outlet successively after rotation rises fluidised form, with the thermally desulfurizing waste water mass transfer convection current of atomization
Deflector is discharged.The modulation axis body of exit gas distributed modulation device and the modulation axis body picture of inlet gas distributed modulation device are a pair of empty
Quasi- bearing, inlet gas distributed modulation device, exit gas distributed modulation device are jointly scattered in air-flow to rotate around atomized drop
The cyclone flow patterns of movement realize efficient mass transfer heat transfer, keep air inlet/outlet more uniform, space availability ratio greatly improves in tower, effectively
Reduce tower height degree.Inlet gas distributed modulation device modulation axis body centre be cylinder, both ends be semicircle sphere or cone,
It can be with enhanced modulation blade to the rotation modulation intensity of gas, the lower end semi-round ball of the modulation axis body of exit gas distributed modulation device
Body or cone have same effect.
System and method provided by the invention can effectively concentrate desulfurization wastewater, have the following advantages that simultaneously：
1, concentrated water drainage is much smaller than other concentration Decrement Techniques, mitigates end-o f-pipe -control (such as significantly：Evaporative crystallization etc.)
Investment and O＆M expense【Compared with MVC/MED thermal concentration technologies, end-o f-pipe -control is (such as：Evaporative crystallization etc.) investment and operation and maintenance expenses
With 25% or more can be reduced；Compared with RO high pressure reverse osmosis concentration technologies, end-o f-pipe -control is (such as：Evaporative crystallization etc.) investment and fortune
Dimension expense can reduce by 50% or more；Compared with the positive osmosis concentration technologies of FO, end-o f-pipe -control is (such as：Evaporative crystallization etc.) investment and fortune
Dimension expense can reduce by 32% or more】.
2, system operating temperature is 50-95 DEG C or so, can efficiently use the various low-temperature waste heats of power plant as heat source.
3, major process unit uses plastic materials or ordinary carbon steel plastic lining class material manufacture, and uses and directly connect
Heat and mass is touched, there is higher heat and mass efficiency and excellent anti-corrosion anti-scale performance.
4, relatively low to pretreatment water quality requirement, desulfurization wastewater pretreatment investment and O＆M expense will not be increased；
5, equipment investment is few, floor space is small, operation and maintenance are simple, and investment and O＆M expense are reduced much smaller than other concentrations
Technology【60% or more investment can be reduced；50% or more operating cost can be reduced】, system run all right is reliable, and treatment effect is bright
Aobvious, production water is better than up to distilled water water quality《GB/T19923-2005 urban sewage reutilizations-industry water standard》(technique
Water) technical standard, fully recovering is in sulfur removal technology water.Concentrate after concentration decrement, can be used for lime-ash damping or is cured
Processing.
Description of the drawings
Fig. 1 is the structural schematic diagram of desulfurization wastewater airdistillation concentration systems；
Fig. 2 is the structural schematic diagram of inlet gas distributed modulation device；
Fig. 3 is the structural schematic diagram of the modulation blade of inlet gas distributed modulation device；
Fig. 4 is the structural schematic diagram of inlet gas distributed modulation device and entrance guiding plate；
Fig. 5 is exit gas distributed modulation device and exports the structural schematic diagram of deflector；
Wherein, 21- entrance guidings plate, 22- export deflector, and 23- modulates axis body, 24- blades, stirrup in 25-, outside 26-
Stirrup.
Specific implementation mode
The essentiality content of the present invention is specifically introduced with reference to embodiment, but the protection model of the present invention is not limited with this
It encloses.
The embodiment is by taking desulfurization wastewater as an example.
A kind of in line thermally desulfurizing waste water airdistillation concentration systems of air Natural Circulation water as shown in Figure 1, including sky
Gas air admission unit, desulfurization wastewater feed liquor unit and distillation and concentration tower further include desulfurization wastewater heating unit；
The lower part of the distillation and concentration tower is equipped with air inlet, and bottom is equipped with concentrate and collects cone bucket, and top is equipped with humid air
Outlet；
The air inlet unit includes air cleaner and wind turbine, and air passes through air cleaner, wind turbine from steaming successively
The air inlet for evaporating concentration tower enters tower body；
The desulfurization wastewater feed liquor unit includes desulfurization wastewater input duct, and one end of the pipeline is from the upper of distillation and concentration tower
Portion enters tower body and downwardly open (be equipped with atomizer), and the other end is desulfurization wastewater inlet；The desulfurization wastewater heating unit
Include preheater and heat exchanger in desulfurization wastewater input duct, desulfurization wastewater successively preheated device and heat exchanger heat into
Enter tower body；The preheater also with the humid air outlet of distillation and concentration tower, enters after the preheated device dehumidification by condensation of humid air
Air inlet unit Natural Circulation；The heat exchanger also connects with the heat source (hot water, steam or heat smoke) heated for desulfurization wastewater
It is logical；
The concentrate collects cone bucket and is equipped with drain valve and positive displacement pump, and concentrate is through drain valve and positive displacement pump direct emission.
The airdistillation concentration systems further include be set to tower body air inlet at air inlet modulating mechanism and set on tower body it is wet
Bleed modulation mechanism (as shown in Figure 2-5) at air outlet slit；
The air inlet modulating mechanism include inlet gas distributed modulation device and it is multiple be set to inlet gas distributed modulation device under
Side is for the entrance guiding plate by horizontal gas flow guiding for uprush；The bleed modulation mechanism includes that exit gas distribution is adjusted
Device processed and multiple outlet deflectors above exit gas distributed modulation device for guiding uprush as horizontal gas flow；
Entrance guiding plate or outlet deflector are respectively by horizontal segment, vertical section and the segmental arc that horizontal segment is connected to transition with vertical section
Composition；
The inlet gas distributed modulation device, exit gas distributed modulation device respectively include intermediate modulation axis body and are set to
Modulate the modulation blade of axis body surrounding；The centre of the modulation axis body of inlet gas distributed modulation device is cylinder, and both ends are semicircle
Sphere or cone；The modulation axis body of exit gas distributed modulation device is the cylinder that a lower end is semicircle sphere or cone；
The modulation blade is set to the lower end of cylinder, including multiple be in tilted layout is used in cylinder circumferential direction by vertical ascent gas
Stream is modulated into the blade of spinning updraft；Specifically, modulate that stirrup and outer stirrup are equidistantly circumferentially fixed in vanes and cover
It is located at the lower end of the cylinder of gas distributed modulation device.The modulation axis body is hollow structure.
The exit gas distributed modulation device is located at the vertical direction of inlet gas distributed modulation device.
A kind of desulfurization wastewater airdistillation method for concentration using above system：It is carrier gas from distillation and concentration tower using air
Air inlet enters, the heat that the preheated device preheating under being sprayed in distillation and concentration tower and from distillation and concentration tower upper end, heat exchanger heat
Desulfurization wastewater convection current, partial moisture is taken away by air in desulfurization wastewater, respectively obtains wet saturated air and desulfurization wastewater concentrate；
After the wet preheated device phase-change heat-exchange of saturated air, vapor therein condenses to form condensed water and dehumidified air, and the dehumidifying is empty
Gas enters air inlet unit Natural Circulation, and the desulfurization wastewater concentrate that condensed water and concentrate are collected in cone bucket discharges naturally.
Specifically, the heat source of heat exchanger is heat smoke before deduster.
In addition, different operating section answers design sample mouth, observation panel, access hole, the convenient sampling of observation at any time, observation, opening
Maintenance checks internal part；Different operating section should configure pressure gauge, thermometer.Tower body sectional making, flanged joint.Different portions
The material of part should select material according to the ingredient and concentration of contact medium.Resistant material can according to the ingredient of contact medium and
Concentration selects the rubber or plastics of carbon steel liner heatproof >=100 DEG C【Such as：Polytetrafluoroethylene (PTFE), fiberglass, PP polypropylene, glass squama
Piece etc.】Or metal【Such as：Stainless steel, titanium alloy, C276,1.4529 etc.】Or the plastics of heatproof >=100 DEG C【Such as：Polytetrafluoroethyl-ne
Alkene, fiberglass, PP polypropylene etc.】.
In above-mentioned technical proposal, normal temperature air enters tower body from air inlet, with spinning updraft and atomization in tower
Thermally desulfurizing concentrates waste water convection current, and the desulfurization concentration waste water by concentration enters concentrate and collects cone bucket, carries the wet saturation of moisture
Air is exported from humid air and is discharged.Air cleaner is used for air filtration, and wind turbine is used to provide power for air.Preheater one
The heat that aspect is used to collect humid air tentatively preheats desulfurization wastewater, on the other hand carries out dehumidification by condensation to humid air, this is cold
Condensate is recycled up to distilled water water quality, and the air of dehumidifying continues with from air inlet, avoids discharging exhaust gas into air.
For heat exchanger for being further heated to required temperature to the desulfurization wastewater of preheating, the heat source that heat is provided for heat exchanger can be heat
Water, steam or the heat smoke of power plant.In order to reduce tower height, equipment investment and occupied space are reduced, needs raising airdistillation dense
Contracting efficiency, air inlet modulating mechanism and bleed modulation mechanism can play this effect.Inlet gas distributed modulation device, exit gas
Distributed modulation device respectively includes intermediate modulation axis body and the modulation blade set on modulation axis body surrounding.Exit gas distributed modulation
Device is located at the vertical direction of inlet gas distributed modulation device, is all located on the center line of tower body；Entrance guiding plate is in vertical direction
It is upper to be located at below inlet gas distributed modulation device, face air intake pipe in horizontal direction；Deflector is exported in vertical direction
It is upper to be located above exit gas distributed modulation device, face air exhaust pipeline in horizontal direction；Air enters from admission line to be blown
It is vertical fluidised form to be guided to entrance guiding plate by horizontal fluidised form, then blows to inlet gas distributed modulation device by vertical ascent fluidised form tune
It is made as blowing to exit gas distributed modulation device, outlet successively after rotation rises fluidised form, with the thermally desulfurizing waste water mass transfer convection current of atomization
Deflector is discharged.The modulation axis body of exit gas distributed modulation device and the modulation axis body picture of inlet gas distributed modulation device are a pair of empty
Quasi- bearing, inlet gas distributed modulation device, exit gas distributed modulation device are jointly scattered in air-flow to rotate around atomized drop
The cyclone flow patterns of movement realize efficient mass transfer heat transfer, keep air inlet/outlet more uniform, space availability ratio greatly improves in tower, effectively
Reduce tower height degree.Inlet gas distributed modulation device modulation axis body centre be cylinder, both ends be semicircle sphere or cone,
It can be with enhanced modulation blade to the rotation modulation intensity of gas, the lower end semi-round ball of the modulation axis body of exit gas distributed modulation device
Body or cone have same effect.
System and method provided by the invention can effectively concentrate desulfurization wastewater, have the following advantages that simultaneously：
1, concentrated water drainage is much smaller than other concentration Decrement Techniques, mitigates end-o f-pipe -control (such as significantly：Evaporative crystallization etc.)
Investment and O＆M expense【Compared with MVC/MED thermal concentration technologies, end-o f-pipe -control is (such as：Evaporative crystallization etc.) investment and operation and maintenance expenses
With 25% or more can be reduced；Compared with RO high pressure reverse osmosis concentration technologies, end-o f-pipe -control is (such as：Evaporative crystallization etc.) investment and fortune
Dimension expense can reduce by 50% or more；Compared with the positive osmosis concentration technologies of FO, end-o f-pipe -control is (such as：Evaporative crystallization etc.) investment and fortune
Dimension expense can reduce by 32% or more】.
2, system operating temperature is 50-95 DEG C or so, can efficiently use the various low-temperature waste heats of power plant as heat source.
3, major process unit uses plastic materials or ordinary carbon steel plastic lining class material manufacture, and uses and directly connect
Heat and mass is touched, there is higher heat and mass efficiency and excellent anti-corrosion anti-scale performance.
4, relatively low to pretreatment water quality requirement, desulfurization wastewater pretreatment investment and O＆M expense will not be increased；
5, equipment investment is few, floor space is small, operation and maintenance are simple, and investment and O＆M expense are reduced much smaller than other concentrations
Technology【60% or more investment can be reduced；50% or more operating cost can be reduced】, system run all right is reliable, and treatment effect is bright
Aobvious, production water is better than up to distilled water water quality《GB/T19923-2005 urban sewage reutilizations-industry water standard》(technique
Water) technical standard, fully recovering is in sulfur removal technology water.Concentrate after concentration decrement, can be used for lime-ash damping or is cured
Processing.
The effect of above-described embodiment is specifically to introduce the essentiality content of the present invention, but those skilled in the art should know
Protection scope of the present invention should not be confined to the specific embodiment by road.
Claims (9)
1. a kind of thermal wastewater airdistillation concentration systems that air Natural Circulation water is in line, it is characterised in that：Including air inlet
Unit, waste water feed liquor unit and distillation and concentration tower further include waste water heating unit；
The lower part of the distillation and concentration tower is equipped with air inlet, and bottom is equipped with concentrate and collects cone bucket, and top is exported equipped with humid air；
The air inlet unit includes air cleaner and wind turbine, and it is dense from distilling that air passes through air cleaner, wind turbine successively
The air inlet of contracting tower enters tower body；
The waste water feed liquor unit includes waste water input duct, and one end of the pipeline enters tower body simultaneously from the top of distillation and concentration tower
Downwardly open, the other end is waste water inlet；The waste water heating unit include be set to waste water input duct on preheater and
Heat exchanger, preheated device and heat exchanger heating enter tower body to waste water successively；
With the humid air outlet of distillation and concentration tower, air is also entered after the preheated device dehumidification by condensation of humid air for the preheater
Air admission unit Natural Circulation；The heat exchanger is also connected to for the heat source that waste water heats；
The concentrate collects cone bucket and is equipped with drain valve and positive displacement pump, and concentrate is through drain valve and positive displacement pump direct emission.
2. airdistillation concentration systems according to claim 1, it is characterised in that：Further include being set at tower body air inlet
Air inlet modulating mechanism and bleed modulation mechanism set on tower body humid air exit；
The air inlet modulating mechanism includes that inlet gas distributed modulation device and multiple be set to below inlet gas distributed modulation device are used
In the entrance guiding plate by horizontal gas flow guiding for uprush；The bleed modulation mechanism includes exit gas distributed modulation device
With multiple outlet deflectors above exit gas distributed modulation device for guiding uprush as horizontal gas flow；
The inlet gas distributed modulation device, exit gas distributed modulation device respectively include intermediate modulation axis body and set on modulation
The modulation blade of axis body surrounding；The centre of the modulation axis body of inlet gas distributed modulation device is cylinder, and both ends are semicircle sphere
Or cone；The modulation axis body of exit gas distributed modulation device is the cylinder that a lower end is semicircle sphere or cone；It is described
The lower end that blade is set to cylinder is modulated, including multiple be in tilted layout is used in cylinder circumferential direction by vertical ascent air-flow tune
The blade of spinning updraft is made；
The exit gas distributed modulation device is located at the vertical direction of inlet gas distributed modulation device.
3. airdistillation concentration systems according to claim 2, it is characterised in that：The entrance guiding plate or outlet water conservancy diversion
Horizontal segment is connected by horizontal segment, vertical section and with vertical section the segmental arc of transition and formed by plate respectively.
4. airdistillation concentration systems according to claim 2, it is characterised in that：Stirrup and outer in the modulation vanes
Stirrup is equidistantly circumferentially fixed and the lower end of the cylinder that is set in gas distributed modulation device.
5. airdistillation concentration systems according to claim 2, it is characterised in that：The modulation axis body is hollow structure.
6. airdistillation concentration systems according to claim 1, it is characterised in that：The waste water input duct is located at tower body
Interior and downwardly open one end is equipped with atomizer.
7. airdistillation concentration systems according to claim 1, it is characterised in that：Heat source is hot water, steam or heat smoke.
8. a kind of waste water airdistillation method for concentration using any systems of claim 1-7, it is characterised in that：With air
Enter from the air inlet of distillation and concentration tower for carrier gas, the preheated device under being sprayed in distillation and concentration tower and from distillation and concentration tower upper end
The thermal wastewater convection current that preheating, heat exchanger heat, useless water part moisture are taken away by air, respectively obtain wet saturated air and waste water
Concentrate；After the wet preheated device phase-change heat-exchange of saturated air, vapor therein condenses to form condensed water and dehumidified air, should
Dehumidified air enters air inlet unit Natural Circulation, and the Waste water concentrating liquid that condensed water and concentrate are collected in cone bucket is arranged naturally
It puts.
9. according to the method described in claim 8, it is characterized in that：The heat source of heat exchanger is heat smoke before deduster.
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Cited By (1)
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| CN109966766A (en) * | 2019-03-15 | 2019-07-05 | 南京航空航天大学 | In conjunction with heat pump energy-conserving high-efficiency evaporating and crystallizing and air dehumidification system and method |
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