CN108640187A - A kind of thermal wastewater concentration systems that hot-air pressure-cycling water is in line and method - Google Patents
A kind of thermal wastewater concentration systems that hot-air pressure-cycling water is in line and method Download PDFInfo
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- CN108640187A CN108640187A CN201810234629.0A CN201810234629A CN108640187A CN 108640187 A CN108640187 A CN 108640187A CN 201810234629 A CN201810234629 A CN 201810234629A CN 108640187 A CN108640187 A CN 108640187A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004821 distillation Methods 0.000 claims abstract description 29
- 239000012141 concentrate Substances 0.000 claims abstract description 27
- 230000006835 compression Effects 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 20
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 16
- 239000012159 carrier gas Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 84
- 238000010438 heat treatment Methods 0.000 claims description 23
- 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
- 239000007921 spray Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 description 34
- 230000023556 desulfurization Effects 0.000 description 34
- 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 9
- 230000003009 desulfurizing effect 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
- 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
- 238000009826 distribution Methods 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 238000000889 atomisation 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
- 239000012528 membrane Substances 0.000 description 3
- 238000012545 processing 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
- 238000009835 boiling Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001704 evaporation 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
- 230000000630 rising effect Effects 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
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 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
- 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
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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Abstract
The invention discloses a kind of thermal wastewater concentration systems that hot-air pressure-cycling water is in line and methods, the system and method heat air from air inlet unit to obtain hot-air through heat exchanger, enter from distillation and concentration tower air inlet using the hot-air as carrier gas, 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；The wet saturated air is first compressed through air thermal compression unit, preheated device phase-change heat-exchange again, vapor therein condenses to form condensed water and dehumidified air, the dehumidified air enters air inlet unit pressure-cycling by air expansion cell, and the concentrate 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 hot-air pressure-cycling
The in line thermal wastewater concentration systems of water and 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, provides a kind of thermal wastewater that hot-air pressure-cycling water is in line
Concentration systems 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 hot-air pressure-cycling water is in line, including it is air inlet unit, useless
Water feed liquor unit and distillation and concentration tower further include that air-heating unit, waste water heating unit, air thermal compression unit and expansion are single
Member；
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-heating unit includes First Heat Exchanger, air
Pass through air cleaner, wind turbine, First Heat Exchanger successively and enters tower body from the air inlet of distillation and concentration tower；The First Heat Exchanger
Also it is connected to for the heat source that air heats；
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, the second heat exchanger, the preheated device preheating of waste water, the heating of the second heat exchanger enter tower body；Preheater also passes through air hot compression
The humid air outlet of unit and distillation and concentration tower is expanded by air after the preheated device dehumidification by condensation of humid air of compression single
Member enters air inlet unit pressure-cycling；Second 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.
Further, the air thermal compression unit is mechanical compressor or vapor compressor；The air expansion is single
Member is throttle valve or air expander.
A kind of waste water airdistillation method for concentration using above system：Air is added from air inlet unit through heat exchanger
Heat obtains hot-air, using the hot-air be carrier gas from distillation and concentration tower air inlet enter, in distillation and concentration tower with from distillation it is dense
The thermal wastewater convection current of the preheating of preheated device, heat exchanger heating under the spray of contracting tower upper end, useless water part moisture are taken away by air, point
Wet saturated air and Waste water concentrating liquid are not obtained；The wet saturated air is first compressed through air thermal compression unit, then preheated device phase
Become heat exchange, vapor therein condenses to form condensed water and dehumidified air, which enters sky by air expansion cell
The concentrate that gas air admission unit pressure-cycling, 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 be gas and hydraulic fluid side and meanwhile heat after hot-air and desulfurization wastewater locate in advance
Manage water】, saturated moist air have it is higher partial pressure and higher water content, by dry air be humidified realize desulfurization wastewater locate in advance
Manage the concentration of the evaporation and salinity of water.The high temperature saturated moist air that packed tower is discharged recycles heat preheated air heel row through heat exchanger
Enter desulfurizing tower as sulfur removal technology moisturizing, production water can reach distilled water water quality, be better than《GB/T19923-2005》Technical standard.
Airdistillation concentrate is for coal-burning power plant's dry ash slag damping or drains into end solidified cell progress curing process, to realize combustion
Coal-fired plant's desulfurization wastewater zero-emission.
In above-mentioned technical proposal, the air of heating enters tower body from air inlet, with spinning updraft and atomization in tower
Thermally desulfurizing concentrate waste water convection current, the desulfurization concentration waste water by concentration enters concentrate and collects cone bucket, carries the wet full of moisture
It exports and is discharged from humid air with air.Air cleaner is used for air filtration, and wind turbine is used to provide power for air.Preheater
On the one hand desulfurization wastewater is tentatively preheated for collecting the heat of humid air, dehumidification by condensation on the other hand is carried out to humid air, it should
Condensed water is recycled up to distilled water water quality, and the air of dehumidifying is continued with from air inlet, avoids discharging into air useless
Gas.Heat exchanger for being heated to required temperature to air, desulfurization wastewater, the heat source that heat is provided for heat exchanger can be hot water,
Steam or the heat smoke of power plant.In order to reduce tower height, equipment investment and occupied space are reduced, needs to improve airdistillation concentration effect
Rate, air inlet modulating mechanism and bleed modulation mechanism can play this effect.Inlet gas distributed modulation device, exit gas distribution
Modulator respectively includes intermediate modulation axis body and the modulation blade set on modulation axis body surrounding.Exit gas distributed modulation device position
In the vertical direction of inlet gas distributed modulation device, it is all located on the center line of tower body；Entrance guiding plate position in vertical direction
Below inlet gas distributed modulation device, face air intake pipe in horizontal direction；Export deflector position in vertical direction
Above exit gas distributed modulation device, face air exhaust pipeline in horizontal direction；Air from admission line enter blow into
Mouth deflector is vertical fluidised form by the guiding of horizontal fluidised form, then blows to inlet gas distributed modulation device and be modulated to by vertical ascent fluidised form
Rotation blows to exit gas distributed modulation device, outlet water conservancy diversion successively after rising fluidised form, with the thermally desulfurizing waste water mass transfer convection current of atomization
Plate is discharged.Modulation axis body picture a pair of imaginary axis of the modulation axis body and inlet gas distributed modulation device of exit gas distributed modulation device
It holds, inlet gas distributed modulation device, exit gas distributed modulation device make air-flow be scattered in around atomized drop rotary motion jointly
Cyclone flow patterns, realize efficient mass transfer heat transfer, keep air inlet/outlet more uniform, space availability ratio greatly improves in tower, effectively reduce
Tower height degree.The centre of the modulation axis body of inlet gas distributed modulation device is cylinder, and both ends are semicircle sphere or cone, can be with
Enhanced modulation blade to the rotation modulation intensity of gas, the lower end semicircle sphere of the modulation axis body of exit gas distributed modulation device or
Cone has same effect.Pressure difference in cycle is kept using compression and expansion device.In the circulating cycle, distillation is left
The saturated moist air mechanical compressor or vapor compressor (TVC) of tower compress, and then dehumidify in preheater, reuse section
Stream valve or air expander make the air after dehumidifying expand, and the air of expansion enters air inlet unit and is sent to destilling tower, empty
Therefore gas is run in the closed circuit.This pressure-cycling can significantly improve the thermal efficiency, and capacity usage ratio is high.
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 hot-air pressure-cycling water as shown in Figure 1, including
Air inlet unit, desulfurization wastewater feed liquor unit and distillation and concentration tower further include air-heating unit, desulfurization wastewater heating list
Member, air thermal compression unit and expansion cell；
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-heating unit includes First Heat Exchanger, air
Pass through air cleaner, wind turbine, First Heat Exchanger successively and enters tower body from the air inlet of distillation and concentration tower；First Heat Exchanger also with
For heat source (hot water, the steam or heat smoke) connection of air heating；
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, the second heat exchanger in desulfurization wastewater input duct, the preheated device preheating of desulfurization wastewater, the second heat exchanger
Heating enters tower body；Preheater also by the humid air outlet of air thermal compression unit and distillation and concentration tower, compression it is wet
Enter air inlet unit pressure-cycling by air expansion cell after the preheated device dehumidification by condensation of air；Second heat exchanger
Also it is connected to the heat source (hot water, steam or heat smoke) heated for desulfurization wastewater；The air thermal compression unit is mechanical compression
Machine or vapor compressor；The air expansion cell is throttle valve or air expander；
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, including air is passed through from air inlet unit
Heat exchanger heats to obtain hot-air, using the hot-air be carrier gas from distillation and concentration tower air inlet enter, in distillation and concentration tower with
The part from the thermally desulfurizing waste water convection current of the preheating of preheated device, heat exchanger heating under the spray of distillation and concentration tower upper end, desulfurization wastewater
Moisture is taken away by air, respectively obtains wet saturated air and desulfurization wastewater concentrate；The wet saturated air is first through air hot compression
Cell compression, then preheated device phase-change heat-exchange, vapor therein condense to form condensed water and dehumidified air, dehumidified air warp
It crosses air expansion cell and enters air inlet unit pressure-cycling, the concentrate that condensed water and concentrate are collected in cone bucket is arranged naturally
It puts.
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, the air of heating enters tower body from air inlet, with spinning updraft and atomization in tower
Thermally desulfurizing concentrate waste water convection current, the desulfurization concentration waste water by concentration enters concentrate and collects cone bucket, carries the wet full of moisture
It exports and is discharged from humid air with air.Air cleaner is used for air filtration, and wind turbine is used to provide power for air.Preheater
On the one hand desulfurization wastewater is tentatively preheated for collecting the heat of humid air, dehumidification by condensation on the other hand is carried out to humid air, it should
Condensed water is recycled up to distilled water water quality, and the air of dehumidifying is continued with from air inlet, avoids discharging into air useless
Gas.Heat exchanger for being heated to required temperature to air, desulfurization wastewater, the heat source that heat is provided for heat exchanger can be hot water,
Steam or the heat smoke of power plant.In order to reduce tower height, equipment investment and occupied space are reduced, needs to improve airdistillation concentration effect
Rate, air inlet modulating mechanism and bleed modulation mechanism can play this effect.Inlet gas distributed modulation device, exit gas distribution
Modulator respectively includes intermediate modulation axis body and the modulation blade set on modulation axis body surrounding.Exit gas distributed modulation device position
In the vertical direction of inlet gas distributed modulation device, it is all located on the center line of tower body；Entrance guiding plate position in vertical direction
Below inlet gas distributed modulation device, face air intake pipe in horizontal direction；Export deflector position in vertical direction
Above exit gas distributed modulation device, face air exhaust pipeline in horizontal direction；Air from admission line enter blow into
Mouth deflector is vertical fluidised form by the guiding of horizontal fluidised form, then blows to inlet gas distributed modulation device and be modulated to by vertical ascent fluidised form
Rotation blows to exit gas distributed modulation device, outlet water conservancy diversion successively after rising fluidised form, with the thermally desulfurizing waste water mass transfer convection current of atomization
Plate is discharged.Modulation axis body picture a pair of imaginary axis of the modulation axis body and inlet gas distributed modulation device of exit gas distributed modulation device
It holds, inlet gas distributed modulation device, exit gas distributed modulation device make air-flow be scattered in around atomized drop rotary motion jointly
Cyclone flow patterns, realize efficient mass transfer heat transfer, keep air inlet/outlet more uniform, space availability ratio greatly improves in tower, effectively reduce
Tower height degree.The centre of the modulation axis body of inlet gas distributed modulation device is cylinder, and both ends are semicircle sphere or cone, can be with
Enhanced modulation blade to the rotation modulation intensity of gas, the lower end semicircle sphere of the modulation axis body of exit gas distributed modulation device or
Cone has same effect.Pressure difference in cycle is kept using compression and expansion device.In the circulating cycle, distillation is left
The saturated moist air mechanical compressor or vapor compressor (TVC) of tower compress, and then dehumidify in preheater, reuse section
Stream valve or air expander make the air after dehumidifying expand, and the air of expansion enters air inlet unit and is sent to destilling tower, empty
Therefore gas is run in the closed circuit.This pressure-cycling can significantly improve the thermal efficiency, and capacity usage ratio is high.
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 (10)
1. a kind of thermal wastewater airdistillation concentration systems that hot-air pressure-cycling water is in line, it is characterised in that：Including air into
Gas unit, waste water feed liquor unit and distillation and concentration tower further include air-heating unit, waste water heating unit, air hot compression list
Member and expansion cell；
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 air-heating unit includes First Heat Exchanger, and air is successively
Enter tower body from the air inlet of distillation and concentration tower by air cleaner, wind turbine, First Heat Exchanger；The First Heat Exchanger also with
For the heat source connection of air heating；
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 includes the preheater being set in waste water input duct, the
Two heat exchangers, the preheated device preheating of waste water, the heating of the second heat exchanger enter tower body；Preheater also by air thermal compression unit with
The humid air outlet of distillation and concentration tower enters by air expansion cell after the preheated device dehumidification by condensation of humid air of compression
Air inlet unit pressure-cycling；Second 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. airdistillation concentration systems according to claim 1, it is characterised in that：The air thermal compression unit is machinery
Compressor or vapor compressor；The air expansion cell is throttle valve or air expander.
9. a kind of waste water airdistillation method for concentration using any systems of claim 1-8, it is characterised in that：By air
It heats through heat exchanger to obtain hot-air from air inlet unit, enter from distillation and concentration tower air inlet using the hot-air as carrier gas,
With the thermal wastewater convection current from the preheating of preheated device, heat exchanger heating under the spray of distillation and concentration tower upper end in distillation and concentration tower, give up
Water part moisture is taken away by air, respectively obtains wet saturated air and Waste water concentrating liquid；The wet saturated air is first through air warm
Compression unit compresses, then preheated device phase-change heat-exchange, vapor therein condense to form condensed water and dehumidified air, and the dehumidifying is empty
Gas enters air inlet unit pressure-cycling by air expansion cell, and condensed water and concentrate collect the concentrate in cone bucket certainly
So discharge.
10. according to the method described in claim 9, it is characterized in that：The heat source of heat exchanger is heat smoke before deduster.
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| CN201810234629.0A CN108640187A (en) | 2018-03-21 | 2018-03-21 | A kind of thermal wastewater concentration systems that hot-air pressure-cycling water is in line and method |
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Application publication date: 20181012 |