CN108408811A - The thermal wastewater concentrate fluidized crystallization drying system and method for hot-air Natural Circulation - Google Patents
The thermal wastewater concentrate fluidized crystallization drying system and method for hot-air Natural Circulation Download PDFInfo
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- CN108408811A CN108408811A CN201810235080.7A CN201810235080A CN108408811A CN 108408811 A CN108408811 A CN 108408811A CN 201810235080 A CN201810235080 A CN 201810235080A CN 108408811 A CN108408811 A CN 108408811A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 63
- 238000001035 drying Methods 0.000 title claims abstract description 55
- 238000002425 crystallisation Methods 0.000 title claims abstract description 53
- 230000008025 crystallization Effects 0.000 title claims abstract description 53
- 239000012141 concentrate Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012546 transfer Methods 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000005243 fluidization Methods 0.000 claims abstract description 15
- 238000007667 floating Methods 0.000 claims abstract description 11
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- 238000009833 condensation Methods 0.000 claims abstract description 9
- 230000005494 condensation Effects 0.000 claims abstract description 9
- 239000007921 spray Substances 0.000 claims abstract description 9
- 150000003839 salts Chemical class 0.000 claims abstract description 5
- 239000012159 carrier gas Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 87
- 239000007788 liquid Substances 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000779 smoke Substances 0.000 claims description 12
- 238000007791 dehumidification Methods 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 description 23
- 230000023556 desulfurization Effects 0.000 description 23
- 238000010586 diagram Methods 0.000 description 9
- 230000003009 desulfurizing effect Effects 0.000 description 6
- 239000012717 electrostatic precipitator Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 230000003373 anti-fouling effect Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 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
- 238000004064 recycling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- 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
-
- 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
- C02F1/12—Spray evaporation
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses the thermal wastewater concentrate fluidized crystallization drying systems and method of hot-air Natural Circulation, the system and method heat air from air inlet unit to obtain hot-air through First Heat Exchanger, enter from the air inlet of fluidized crystallization drying tower using the hot-air as carrier gas, sphere padding is blown into micro- floating fluidisation state between transfer roller inner/outer tube；Preheated device preheating, the thermal wastewater concentrate of second heat exchanger heating distributes to the atomizer being arranged on transfer roller inner cylinder, atomizing spray to sphere padding surface and hot-air carries out heat and mass, moisture is taken away to obtain wet saturated air by hot-air, salinity in concentrate is hardened in fluidisation state sphere padding surface crystallization drying, with the rotation of inner cylinder and the flowing of hot-air, it is ground between salt lease making sphere padding, collision falls off and cone bucket is collected in the crystallization to sink to bottom of tower through outer barrel mesh screen, after the wet preheated device phase-change heat-exchange of saturated air, condensation forms dehumidified air, dehumidified air enters air inlet unit Natural Circulation.
Description
Technical field
The present invention relates to field of waste water treatment, are related to the end solidification of waste water, and in particular to a kind of hot-air Natural Circulation
Thermal wastewater concentrate fluidized crystallization drying system and method, the Waste water concentrating liquid be desulfurization wastewater concentrate.
Background technology
Desulfurization wastewater Zero discharging system generally comprises pretreatment unit, concentration decrement unit, end solidified cell three parts.
Currently, the end curing technology used both at home and abroad mainly has：Evaporative crystallization drying, direct-injection flue crystallizing and drying, side
Road flue crystallizing and drying, hot wind crystallizing and drying.
Evaporative crystallization is dried：Evaporation and crystal process consumes a large amount of steam and/or electric power, takes up an area and the floor area of building is big, build
If higher with O＆M cost, equipment scaling and seriously corroded.Evaporative crystallization dries ton water treatment facilities investment about more than 100 ten thousand；Ton
Water process O＆M expense is about more than 100 yuan.
Direct-injection flue crystallizing and drying：Using direct-injection high-temperature flue crystallizing and drying, a large amount of high-temperature flue gas heats are consumed, are directly dropped
Low air preheater efficiency, high energy consumption, while the risk for having damage deduster, reducing efficiency of dust collection；It is crystallized using direct-injection low temperature flue
It is dry, it is limited by low temperature flue flue-gas temperature and dew-point temperature, transpirable wastewater flow rate is limited, can not evaporating completely.And it deposits
In following problem：
(1) after desulfurization wastewater evaporation, highly corrosive chloride cannot cause it in desulfurization completely by electrostatic precipitator collecting
It is accumulated on tower and follow-up equipment, causes heavy corrosion, significantly increase maintenance of equipment frequency and maintenance cost；
(2) goods and materials such as heavy metal are enriched in flying dust in desulfurization wastewater, the recycling of extreme influence flying dust and the peace of user
Quan Xing.
(3) heavy corrosion and fouling are caused to flue, electrostatic precipitator and upstream device after waste water atomization, influences equipment
Operation steady in a long-term, such as：Electrostatic precipitator pole plate fouling reduces efficiency of dust collection, or even influences electrostatic precipitator normal operation.
(4) atomizer and flue serious wear add the corrosion of high concentration chloride, equipment rapid failure.
(5) technique rely primarily on electrostatic precipitator removing evaporative crystallization product, the substance that electrostatic precipitator cannot remove,
Desulfurizing tower is returned to flue gas, continuous circulation collection increases desulfurizing tower load, and it is exceeded to cause the discharges such as PM2.5 and mercury to be easy.
Bypass flue crystallizing and drying：It needs to draw and connects high-temperature flue gas, consume a large amount of high-temperature flue gas heats, directly reduce air preheater
Efficiency, high energy consumption, high equipment cost, equipment scaling and seriously corroded.Bypass flue crystallizing and drying ton water treatment facilities are invested about
3000000, and atomization plant is replaced frequently.
Hot wind crystallizing and drying：Need a large amount of steam, high energy consumption, product that can not utilize, it is difficult to handle.
Invention content
The purpose of the present invention is to overcome the deficiency in the prior art, provides a kind of thermal wastewater concentrate of hot-air Natural Circulation
Fluidized crystallization drying system and method, to realize that the end of Waste water concentrating liquid cures, which concentrates for desulfurization wastewater
Liquid.
The above-mentioned purpose of the present invention is achieved by following technical solution：
A kind of thermal wastewater concentrate fluidized crystallization drying system of hot-air Natural Circulation, including it is air inlet unit, useless
Concentrated liquid feed liquor unit and fluidized crystallization drying tower and air-heating unit, Waste water concentrating liquid heating unit；
The lower part of the fluidized crystallization drying tower is equipped with air inlet, and bottom is equipped with crystallization and collects cone bucket, and top is equipped with wet sky
Gas exports；Tower body is internally provided with the transfer roller being made of inner barrel and outer barrel, and outer barrel is that the peripheral wall that both ends are fixed on tower body wall is net
The tubular structure of sieve-like, inner cylinder are rotatably connected on by two shaft end on tower body wall, are set in the space between inner barrel and outer barrel
There is grain size to be more than the sphere padding in outer barrel mesh screen aperture；The periphery wall of the inner cylinder is equipped with more hydrojet pipelines, each hydrojet pipeline
Multiple atomizers are equipped with, the end face of a shaft end of inner cylinder is equipped with multiple dispensing orifices corresponding with more hydrojet pipelines, respectively
Dispensing orifice is connected to corresponding hydrojet pipeline, and the endface of the shaft end is additionally provided with a distributing valve being fixed on tower body wall, end face
For close-fitting on distributing valve, which is equipped with an inlet opening, as inner cylinder rotates, each dispensing orifice of shaft end successively with the feed liquor
Hole is connected to；The periphery wall of the inner cylinder is additionally provided with the stirring blade for being stirred to sphere padding in rotation；
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 fluidized crystallization drying tower；The heat exchanger
Also it is connected to for the heat source that air heats；
The Waste water concentrating liquid feed liquor unit includes Waste water concentrating liquid input duct, one end of the pipeline and the inlet opening
Connection, the other end are Waste water concentrating liquid inlet；The Waste water concentrating liquid heating unit includes being set to Waste water concentrating liquid inlet tube
Preheater on road and the second heat exchanger, the preheated device preheating of Waste water concentrating liquid, the heating of the second heat exchanger, which enter in tower body, to be turned
In roller；For the preheater also with the humid air outlet of fluidized crystallization drying tower, the preheated device dehumidification by condensation of humid air is laggard
Enter air inlet unit cycle；Second heat exchanger is also connected to the heat source heated for Waste water concentrating liquid.
Further, the fluidized crystallization drying system 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, heat source is hot water, steam or heat smoke.
Further, outer tube inner wall bottom is equipped with multiple scraper plates.
A kind of Waste water concentrating liquid stream crystallizing and drying method using above system, including：By air from air inlet list
Member heats to obtain hot-air through First Heat Exchanger, enters from the air inlet of fluidized crystallization drying tower using the hot-air as carrier gas, turns
Sphere padding is blown into micro- floating fluidisation state between roller inner/outer tube；Preheated device preheating, the thermal wastewater of the second heat exchanger heating are dense
Contracting liquid distributes to the atomizer being arranged on transfer roller inner cylinder, and atomizing spray to sphere padding surface carries out heat transfer biography with hot-air
Matter, moisture are taken away to obtain wet saturated air by hot-air, and the salinity in concentrate is in fluidisation state sphere padding surface crystallization drying
It is hardened, with the rotation of inner cylinder and the flowing of hot-air, ground between salt lease making sphere padding, collision falls off and heavy through outer barrel mesh screen
Cone bucket is collected in the crystallization for dropping down onto bottom of tower, and after the wet preheated device phase-change heat-exchange of saturated air, condensation forms condensed water and dehumidified air,
The dehumidified air enters air inlet unit Natural Circulation.
Further, the heat source of heat exchanger is heat smoke before deduster.
The basic principle of the present invention (by taking desulfurization wastewater concentrate as an example)：Hot-air enters from bottom of tower air inlet, through gas
Modulating mechanism is modulated into cyclone flow patterns, and inertia sphere padding layer is filled between transfer roller inner/outer tube, is blown into micro- floating fluidisation state.Through
The thermally desulfurizing Waste water concentrating liquid for crossing heating distributes to the atomizer being arranged on transfer roller inner cylinder through the liquid dispensing apparatus in transfer roller,
Atomizing spray to pellet surface and hot-air carries out heat and mass, and tower body is discharged with gas in moisture vaporization, and salinity is lazy in fluidisation state
Property pellet surface crystallizing and drying it is hardened, with the rotation of transfer roller, and be modulated into the flowing of the hot-air of cyclone flow patterns, fluidisation state it is lazy
Property spherolite between grinding, collision fall off, rotated with transfer roller, crystallizing and drying salt through outer barrel sieve sink to bottom of tower collect be discharged.Quilt
The moisture of evaporation is discharged with hot-air from tower top, and the preheated device recycling heat of the High Temperature Moist Air obtains dehumidified air cycle profit
With, and can output higher degree salinity.
In above-mentioned technical proposal, the air of heating enters tower body from air inlet, with spinning updraft by inertia in tower
Sphere padding blows into micro- floating fluidisation state, and the thermally desulfurizing Waste water concentrating liquid of atomizing spray to pellet surface is dried, and carries
The wet saturated air of moisture is exported from humid air and is discharged, and salinity is after fluidisation state inertia spherolite surface crystallization drying is hardened with ball
Grinding, the collision of grain, which fall off, to sink through outer barrel mesh screen to the crystallization collection cone bucket of bottom of tower.Air cleaner is used for air filtration,
Wind turbine is used to provide power for air.First Heat Exchanger provides heat for being heated to required temperature to air for First Heat Exchanger
The heat source of amount can be hot water, steam or the heat smoke of power plant.Preheater is on the one hand for collecting the heat of humid air to desulfurization
Waste water concentrating liquid tentatively preheats, and on the other hand carries out dehumidification by condensation to humid air, and the air of dehumidifying is continued with from air inlet, kept away
Exempt to discharge exhaust gas into air.Second heat exchanger is for being further heated to required temperature to the Waste water concentrating liquid of preheating
The heat source that two heat exchangers provide heat can be hot water, steam or the heat smoke of power plant.In order to reduce tower height, equipment investment is reduced
And occupied space, it needs to improve fluidized crystallization drying efficiency, air inlet modulating mechanism and bleed modulation mechanism can play this effect
Fruit.Inlet gas distributed modulation device, exit gas distributed modulation device respectively include intermediate modulation axis body and set on modulation axis bodies
The modulation blade of surrounding.Exit gas distributed modulation device is located at the vertical direction of inlet gas distributed modulation device, is all located at tower body
Center line on；Entrance guiding plate is located at below inlet gas distributed modulation device in vertical direction, and face is empty in horizontal direction
Gas admission line；It exports deflector to be in vertical direction located above exit gas distributed modulation device, face is empty in horizontal direction
Gas discharge duct；Air from admission line enter blow to entrance guiding plate by horizontal fluidised form guiding be vertical fluidised form, then blow into
Gas distributed modulation device is modulated to rotation by vertical ascent fluidised form and rises fluidised form, after the sphere padding mass transfer of spray concentrate
Exit gas distributed modulation device, outlet deflector discharge are blowed to successively.The modulation axis body and entrance of exit gas distributed modulation device
A pair of virtual bearing of modulation axis body picture of gas distributed modulation device, inlet gas distributed modulation device, exit gas distributed modulation device
So that air-flow is modulated into cyclone flow patterns jointly, realize efficient mass transfer heat transfer, keep air inlet/outlet more uniform, space availability ratio is substantially in tower
It improves, effectively reduces 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 with enhanced modulation blade to the rotation modulation intensity of gas, the modulation axis body of exit gas distributed modulation device
Lower end semicircle sphere or cone have same effect.
Advantages of the present invention：
1, heat and mass is efficient：The built-in ball rate of transfer roller is high, and inertia sphere padding is in micro- floating state in tower, and using straight
Heat exchange is connect, heat and mass area is significantly increased, heat and mass is efficient；2, anti-fouling performance is extremely strong：Heat and mass main body-inertia
Sphere padding is in micro- floating state in tower, and is moved with transfer roller, and anti-fouling performance is extremely strong；3, process equipment is simple, small investment, accounts for
Ground area is small；4, stable and reliable operation；5, operating cost is low：Heat source uses 120-150 DEG C of heat smoke before coal-burning power plant's deduster
【Can also be other heat sources, such as steam】, hot blast rate is smaller, is heated using fume afterheat, almost without operating cost.
Description of the drawings
Fig. 1 is the structural schematic diagram of desulfurization wastewater concentrate fluidized crystallization drying system；
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；
Fig. 6 is the structural schematic diagram of transfer roller；
Fig. 7 is the dispensing orifice end view and distributing valve structural schematic diagram of inner cylinder；
Fig. 8 is the structural schematic diagram of the end face opposite with dispensing orifice of inner cylinder；
Fig. 9 is the structural schematic diagram of inner cylinder and hydrojet pipeline, distributing valve；
Wherein, 21- entrance guidings plate, 22- export deflector, and 23- modulates axis body, 24- blades, stirrup in 25-, outside 26-
Stirrup, 31- inner cylinders, 32- outer barrels, 33- sphere paddings, 34- hydrojet pipelines, 35- atomizers, 36- dispensing orifices, 37- distributing valves,
38- inlet openings, 39- stir blade, 40- scraper plates, and 41- is connected to the pipeline of hydrojet pipeline and dispensing orifice, 42- desulfurization wastewater concentrates
Entrance, 43- stir blade.
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 routine test operation that the test operation not being described in detail in experiment is well known to the skilled person.
The embodiment is by taking desulfurization wastewater concentrate as an example.
A kind of thermally desulfurizing Waste water concentrating liquid stream crystallizing and drying system of hot-air Natural Circulation as shown in Figure 1, including
Air inlet unit, desulfurization wastewater concentrate feed liquor unit and fluidized crystallization drying tower and air-heating unit, desulfurization wastewater
Concentrate heating unit；
The lower part of the fluidized crystallization drying tower is equipped with air inlet, and bottom is equipped with crystallization and collects cone bucket, and top is equipped with wet sky
Gas exports；Tower body is internally provided with the transfer roller being made of inner barrel and outer barrel, and outer barrel is that the peripheral wall that both ends are fixed on tower body wall is net
The tubular structure of sieve-like, inner cylinder are rotatably connected on by two shaft end on tower body wall, are set in the space between inner barrel and outer barrel
There is grain size to be more than the sphere padding in outer barrel mesh screen aperture；The periphery wall of the inner cylinder is equipped with more hydrojet pipelines, each hydrojet pipeline
Multiple atomizers are equipped with, the end face of a shaft end of inner cylinder is equipped with multiple dispensing orifices corresponding with more hydrojet pipelines, respectively
Dispensing orifice is connected to corresponding hydrojet pipeline, and the endface of the shaft end is additionally provided with a distributing valve being fixed on tower body wall, end face
For close-fitting on distributing valve, which is equipped with an inlet opening, as inner cylinder rotates, each dispensing orifice of shaft end successively with the feed liquor
Hole is connected to；The periphery wall of the inner cylinder is additionally provided with stirring blade (such as Fig. 6-9 for being stirred to sphere padding in rotation
It is shown)；
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 fluidized crystallization drying tower；The heat exchanger
Also it is connected to for the heat source that air heats；
The desulfurization wastewater concentrate feed liquor unit includes desulfurization wastewater concentrate input duct, one end of the pipeline and institute
Inlet opening connection is stated, the other end is desulfurization wastewater concentrate inlet；The desulfurization wastewater concentrate heating unit includes being set to
Preheater in desulfurization wastewater concentrate input duct and the second heat exchanger, the preheated device preheating of desulfurization wastewater concentrate, second
Heat exchanger heating enters in the transfer roller in tower body；The preheater is wet also with the humid air outlet of fluidized crystallization drying tower
Enter air inlet unit after the preheated device dehumidification by condensation of air to recycle；Second heat exchanger also with for desulfurization wastewater concentrate
The heat source of heating is connected to.
The fluidized crystallization drying system further include be set to tower body air inlet at air inlet modulating mechanism and be set to tower body
The bleed modulation mechanism (as shown in Figure 2-5) in 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.
Wherein, the entrance guiding plate or outlet deflector are respectively by horizontal segment, vertical section and by horizontal segment and vertically
The segmental arc composition of section connection transition；Stirrup and outer stirrup are equidistantly circumferentially fixed in the modulation vanes and are set in gas
The lower end of the cylinder of distributed modulation device；The modulation axis body is hollow structure；Heat source is hot water, steam or heat smoke；Outer barrel
Inner wall bottom is equipped with multiple scraper plates, to improve the efficiency that hardened salinity is detached from from sphere padding.
A kind of desulfurization wastewater concentrate fluidized crystallization drying means using above system, including：By air from air into
Gas unit heats to obtain hot-air through First Heat Exchanger, using the hot-air as carrier gas from the air inlet of fluidized crystallization drying tower into
Enter, sphere padding is blown into micro- floating fluidisation state between transfer roller inner/outer tube；Preheated device preheating, the heat of the second heat exchanger heating are de-
Sulphur Waste water concentrating liquid distributes to the atomizer being arranged on transfer roller inner cylinder, and atomizing spray to sphere padding surface is carried out with hot-air
Heat and mass, moisture are taken away to obtain wet saturated air by hot-air, and the salinity in concentrate is tied on fluidisation state sphere padding surface
Crystalline substance drying is hardened, with the rotation of inner cylinder and the flowing of hot-air, is ground between salt lease making sphere padding, collision falls off and through outer barrel
Cone bucket is collected in the crystallization that mesh screen sinks to bottom of tower, and after the wet preheated device phase-change heat-exchange of saturated air, condensation forms condensed water and removes
Humid air, the dehumidified air enter air inlet unit Natural Circulation.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 by inertia in tower
Sphere padding blows into micro- floating fluidisation state, and the thermally desulfurizing Waste water concentrating liquid of atomizing spray to pellet surface is dried, and carries
The wet saturated air of moisture is exported from humid air and is discharged, and salinity is after fluidisation state inertia spherolite surface crystallization drying is hardened with ball
Grinding, the collision of grain, which fall off, to sink through outer barrel mesh screen to the crystallization collection cone bucket of bottom of tower.Air cleaner is used for air filtration,
Wind turbine is used to provide power for air.First Heat Exchanger provides heat for being heated to required temperature to air for First Heat Exchanger
The heat source of amount can be hot water, steam or the heat smoke of power plant.Preheater is on the one hand for collecting the heat of humid air to desulfurization
Waste water concentrating liquid tentatively preheats, and on the other hand carries out dehumidification by condensation to humid air, and the air of dehumidifying is continued with from air inlet, kept away
Exempt to discharge exhaust gas into air.Second heat exchanger is for being further heated to required temperature to the Waste water concentrating liquid of preheating
The heat source that two heat exchangers provide heat can be hot water, steam or the heat smoke of power plant.In order to reduce tower height, equipment investment is reduced
And occupied space, it needs to improve fluidized crystallization drying efficiency, air inlet modulating mechanism and bleed modulation mechanism can play this effect
Fruit.Inlet gas distributed modulation device, exit gas distributed modulation device respectively include intermediate modulation axis body and set on modulation axis bodies
The modulation blade of surrounding.Exit gas distributed modulation device is located at the vertical direction of inlet gas distributed modulation device, is all located at tower body
Center line on；Entrance guiding plate is located at below inlet gas distributed modulation device in vertical direction, and face is empty in horizontal direction
Gas admission line；It exports deflector to be in vertical direction located above exit gas distributed modulation device, face is empty in horizontal direction
Gas discharge duct；Air from admission line enter blow to entrance guiding plate by horizontal fluidised form guiding be vertical fluidised form, then blow into
Gas distributed modulation device is modulated to rotation by vertical ascent fluidised form and rises fluidised form, after the sphere padding mass transfer of spray concentrate
Exit gas distributed modulation device, outlet deflector discharge are blowed to successively.The modulation axis body and entrance of exit gas distributed modulation device
A pair of virtual bearing of modulation axis body picture of gas distributed modulation device, inlet gas distributed modulation device, exit gas distributed modulation device
So that air-flow is modulated into cyclone flow patterns jointly, realize efficient mass transfer heat transfer, keep air inlet/outlet more uniform, space availability ratio is substantially in tower
It improves, effectively reduces 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 with enhanced modulation blade to the rotation modulation intensity of gas, the modulation axis body of exit gas distributed modulation device
Lower end semicircle sphere or cone have same effect.
System and method provided by the invention can compared with the prior art have as follows with efficient drying desulfurization wastewater concentrate
Advantage：
1, heat and mass is efficient：The built-in ball rate of transfer roller is high, and inertia sphere padding is in micro- floating state in tower, and using straight
Heat exchange is connect, heat and mass area is significantly increased, heat and mass is efficient；2, anti-fouling performance is extremely strong：Heat and mass main body-inertia
Sphere padding is in micro- floating state in tower, and is moved with transfer roller, and anti-fouling performance is extremely strong；3, process equipment is simple, small investment, accounts for
Ground area is small；4, stable and reliable operation；5, operating cost is low：Heat source uses 120-150 DEG C of heat smoke before coal-burning power plant's deduster
【Can also be other heat sources, such as steam】, hot blast rate is smaller, is heated using fume afterheat, almost without operating cost.
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 concentrate fluidized crystallization drying system of hot-air Natural Circulation, it is characterised in that：Including air into
Gas unit, Waste water concentrating liquid feed liquor unit and fluidized crystallization drying tower and air-heating unit, Waste water concentrating liquid heating list
Member；
The lower part of the fluidized crystallization drying tower is equipped with air inlet, and bottom is equipped with crystallization and collects cone bucket, and top goes out equipped with humid air
Mouthful；Tower body is internally provided with the transfer roller being made of inner barrel and outer barrel, and outer barrel is that the peripheral wall that both ends are fixed on tower body wall is mesh
Tubular structure, inner cylinder is rotatably connected on by two shaft end on tower body wall, and grain is equipped in the space between inner barrel and outer barrel
Diameter is more than the sphere padding in outer barrel mesh screen aperture；The periphery wall of the inner cylinder is equipped with more hydrojet pipelines, is set on each hydrojet pipeline
There are multiple atomizers, the end face of a shaft end of inner cylinder is equipped with multiple dispensing orifices corresponding with more hydrojet pipelines, each to distribute
Hole is connected to corresponding hydrojet pipeline, and the endface of the shaft end is additionally provided with a distributing valve being fixed on tower body wall, end face close-fitting
On distributing valve, which is equipped with an inlet opening, and as inner cylinder rotates, each dispensing orifice of shaft end connects with the inlet opening successively
It is logical；The periphery wall of the inner cylinder is additionally provided with the stirring blade for being stirred to sphere padding in rotation；
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 fluidized crystallization drying tower by air cleaner, wind turbine, First Heat Exchanger；The heat exchanger also with
For the heat source connection of air heating；
The Waste water concentrating liquid feed liquor unit includes Waste water concentrating liquid input duct, and one end of the pipeline connects with the inlet opening
Logical, the other end is Waste water concentrating liquid inlet；The Waste water concentrating liquid heating unit includes being set to Waste water concentrating liquid input duct
On preheater and the second heat exchanger, the preheating of Waste water concentrating liquid preheated device, the heating of the second heat exchanger enter the transfer roller in tower body
In；The preheater also with the humid air outlet of fluidized crystallization drying tower, enters after the preheated device dehumidification by condensation of humid air
Air inlet unit recycles；Second heat exchanger is also connected to the heat source heated for Waste water concentrating liquid.
2. fluidized crystallization drying system 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. fluidized crystallization drying system 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. fluidized crystallization drying system 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. fluidized crystallization drying system according to claim 2, it is characterised in that：The modulation axis body is hollow structure.
6. fluidized crystallization drying system according to claim 1, it is characterised in that：Heat source is hot water, steam or heat smoke.
7. fluidized crystallization drying system according to claim 1, it is characterised in that：Outer tube inner wall bottom is equipped with multiple scrape
Plate.
8. a kind of Waste water concentrating liquid stream crystallizing and drying method using any systems of claim 1-7, it is characterised in that：
Air is heated from air inlet unit to obtain hot-air through First Heat Exchanger, is dried from fluidized crystallization using the hot-air as carrier gas
The air inlet of tower enters, and sphere padding is blown into micro- floating fluidisation state between transfer roller inner/outer tube；Preheated device preheating, the second heat exchange
The thermal wastewater concentrate of device heating distributes to the atomizer being arranged on transfer roller inner cylinder, atomizing spray to sphere padding surface and heat
Air carries out heat and mass, and moisture is taken away to obtain wet saturated air by hot-air, and the salinity in concentrate is filled out in fluidisation state spherolite
Expect that surface crystallization drying is hardened, with the rotation of inner cylinder and the flowing of hot-air, is ground between salt lease making sphere padding, collision falls off
And cone bucket is collected in the crystallization to sink to bottom of tower through outer barrel mesh screen, after the wet preheated device phase-change heat-exchange of saturated air, condensation forms cold
Condensate and dehumidified air, the dehumidified air enter air inlet unit Natural Circulation.
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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810235080.7A CN108408811A (en) | 2018-03-21 | 2018-03-21 | The thermal wastewater concentrate fluidized crystallization drying system and method for hot-air Natural Circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810235080.7A CN108408811A (en) | 2018-03-21 | 2018-03-21 | The thermal wastewater concentrate fluidized crystallization drying system and method for hot-air Natural Circulation |
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ID=63133125
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112024151A (en) * | 2020-09-04 | 2020-12-04 | 万载鹏威实业有限公司 | Spray gun for spraying production line |
| CN114111224A (en) * | 2021-11-24 | 2022-03-01 | 浙江迦南科技股份有限公司 | Recovery device capable of recovering redundant heat generated by fluidized bed |
| CN115337741A (en) * | 2022-08-26 | 2022-11-15 | 浙江汇隆新材料股份有限公司 | Circulating air filtering device of crystallization drying tower |
-
2018
- 2018-03-21 CN CN201810235080.7A patent/CN108408811A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112024151A (en) * | 2020-09-04 | 2020-12-04 | 万载鹏威实业有限公司 | Spray gun for spraying production line |
| CN112024151B (en) * | 2020-09-04 | 2021-10-08 | 万载鹏威实业有限公司 | Spray gun for spraying production line |
| CN114111224A (en) * | 2021-11-24 | 2022-03-01 | 浙江迦南科技股份有限公司 | Recovery device capable of recovering redundant heat generated by fluidized bed |
| CN114111224B (en) * | 2021-11-24 | 2022-11-29 | 浙江迦南科技股份有限公司 | Recovery device capable of recovering redundant heat generated by fluidized bed |
| CN115337741A (en) * | 2022-08-26 | 2022-11-15 | 浙江汇隆新材料股份有限公司 | Circulating air filtering device of crystallization drying tower |
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