CN108178218A - A kind of Waste water concentrating liquid stream crystallizing and drying system and method for air direct emission - Google Patents
A kind of Waste water concentrating liquid stream crystallizing and drying system and method for air direct emission Download PDFInfo
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- CN108178218A CN108178218A CN201810235433.3A CN201810235433A CN108178218A CN 108178218 A CN108178218 A CN 108178218A CN 201810235433 A CN201810235433 A CN 201810235433A CN 108178218 A CN108178218 A CN 108178218A
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- 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
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- 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
- C02F1/048—Purification of waste water by evaporation
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
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- 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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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a kind of Waste water concentrating liquid stream crystallizing and drying system and method for air direct emission, air is heated to obtain hot-air by the system and method from air inlet unit through heat exchanger, enter using the hot-air as carrier gas from fluidized crystallization drying tower air inlet, filler is blown into micro- floating fluidisation state between transfer roller inner/outer tube；Waste water concentrating liquid by preheating distributes to the atomizer being arranged on transfer roller inner cylinder, atomizing spray is to filler surface and hot-air heat and mass, moisture is walked wet saturated air by hot-air band, salinity in concentrate is hardened in fluidisation state filler surface crystallization drying, with the rotation of inner cylinder and the flowing of hot-air, it ground between salt lease making sphere padding, collide to come off and sink to bottom of towe to crystallize through outer barrel mesh screen and collect cone bucket, dehumidification by condensation after the wet preheated device phase-change heat-exchange of saturated air, dehumidified air direct emission.Air is carrier gas, carrier gas or use flue gas, helium, argon gas, nitrogen, CO2Or the gases such as steam.
Description
Technical field
The present invention relates to field of waste water treatment, are related to the end curing of waste water, and in particular to a kind of hot-air direct emission
Waste water concentrating liquid stream crystallizing and drying system and method, which can be desulfurization wastewater concentrate, air or adopt
With flue gas, helium, argon gas, nitrogen, CO2Or the gases such as steam are replaced.
Background technology
Desulfurization wastewater Zero discharging system generally comprises pretreatment unit, concentration decrement unit, end solidified cell three parts.
At present, 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 drying 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 have damage deduster, the risk for 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, along with 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 causes the discharges such as PM2.5 and mercury easily exceeded.
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：A large amount of steam, high energy consumption are needed, product can not utilize, it is difficult to handle.
Invention content
Present invention aims at the Waste water concentrating liquid stream crystallizing and drying systems and side for providing a kind of hot-air direct emission
Method, to realize that the end of Waste water concentrating liquid cures, which can be desulfurization wastewater concentrate, air or using cigarette
Gas, helium, argon gas, nitrogen, CO2Or the gases such as steam are replaced.
The above-mentioned purpose of the present invention is achieved by following technical solution：
A kind of Waste water concentrating liquid stream crystallizing and drying system of air direct emission, it is dense including air inlet unit, waste water
Contracting 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 cylinder 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 cylinder and outer barrel
There is the sphere padding that grain size is more than 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 with 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 connects；The periphery wall of the inner cylinder is additionally provided with the stirring blade for being stirred in rotation to sphere padding；
The air inlet unit includes air cleaner and wind turbine, and air-heating unit includes First Heat Exchanger, air
Enter tower body by the air inlet of air cleaner, wind turbine, heat exchanger from fluidized crystallization drying tower successively；The First Heat Exchanger
Also connected with the heat source heated for air；
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 on Waste water concentrating liquid inlet tube
Preheater on road, the preheated device preheating of Waste water concentrating liquid enter in the transfer roller in tower body；The preheater also with fluidized crystallization
The humid air outlet of drying tower, direct emission after the preheated device dehumidification by condensation of humid air；
The air is carrier gas, carrier gas or use flue gas, helium, argon gas, nitrogen, CO2Or the gases such as steam.
Further, what the Waste water concentrating liquid heating unit was further included in Waste water concentrating liquid input duct second changes
Hot device enters after the preheated device preheating of Waste water concentrating liquid, the heating of the second heat exchanger in the transfer roller in tower body；Second heat exchanger
Also connected with the heat source heated for Waste water concentrating liquid.
Further, the fluidized crystallization drying system further include air inlet modulating mechanism at tower body air inlet 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 on inlet gas distributed modulation device under
Side is used for entrance guiding plate of the horizontal gas flow guiding for uprush；The bleed modulation mechanism includes exit gas distribution and adjusts
Device processed and multiple be set on above exit gas distributed modulation device are used for outlet deflector of the uprush guiding for horizontal gas flow；
The inlet gas distributed modulation device, exit gas distributed modulation device respectively include intermediate modulation axis body and are set on
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 on the lower end of cylinder, is used for including multiple be in tilted layout 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
The segmental arc composition of vertical section connection 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, be air or Waste water concentrating liquid heating heat source be hot water, steam or heat smoke.
Further, scraper plate of the outer tube inner wall bottom equipped with multiple raising sphere paddings grindings, collision efficiency.
Further, the preheater is multistage bubble column heat exchanger, is equipped with from bottom to top in multistage bubble column multiple
(condenser is generally the tubular type or plate-type condenser of finned coil formula condenser or other forms to condenser, such as：
Coiler type condenser, fin plate condenser, plate and frame condenser etc.), the bottom of multistage bubble column is equipped with cold inlet, under
And equipped with multiple hot inlets corresponding to each condenser, the cold inlet is Waste water concentrating liquid entrance, and the hot-fluid enters
Mouth is communicated in the humid air that different temperatures is extracted at the different height of fluidized crystallization drying tower, and multiple hot-fluids by pipeline respectively
Correspondence is communicated in the top-down humid air extraction opening of fluidized crystallization drying tower to entrance respectively from bottom to top；The side of multistage bubble column
Face is equipped with condensation production water out, and top is equipped with the thermal wastewater concentrated solution outlet of the dehumidified air outlet and preheating of cooling.
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 heat exchanger, enters using the hot-air as carrier gas from the air inlet of fluidized crystallization drying tower, in transfer roller
Sphere padding is blown into micro- floating fluidisation state between outer barrel；Waste water concentrating liquid by preheating, which is distributed to, to be arranged on transfer roller inner cylinder
Atomizer, atomizing spray to sphere padding surface and hot-air carry out heat and mass, and moisture is taken away to obtain wet full by hot-air
And air, the salinity in concentrate is hardened in fluidisation state sphere padding surface crystallization drying, rotation and hot-air with inner cylinder
Flowing, between salt lease making sphere padding grinding, collision come off and collect cone bucket through the crystallization that outer barrel mesh screen sinks to bottom of towe, it is wet full
Condensed water and dehumidified air, dehumidified air direct emission are formed with condensation after the preheated device phase-change heat-exchange of air；Air is carrier gas,
Carrier gas uses flue gas, helium, argon gas, nitrogen, CO2Or the gases such as steam.
The basic principle of the present invention (by taking desulfurization wastewater concentrate as an example, carrier gas is by taking air as an example)：Hot-air from bottom of towe into
Gas port enters, and is modulated into cyclone flow patterns through gas modulation mechanism, fills inertia sphere padding layer between transfer roller inner/outer tube, blown into
Micro- floating fluidisation state.Preheating or the desulfurization wastewater concentrate further heated distribute to arrangement through the liquid dispensing apparatus in transfer roller
Atomizer on transfer roller inner cylinder, atomizing spray to pellet surface and hot-air carry out heat and mass, and moisture vaporization is arranged with gas
Go out tower body, salinity is hardened in fluidisation state inertia spherolite surface crystallization drying, with transfer roller rotation and be modulated into cyclone flow patterns
The flowing of hot-air, fluidize state inertia spherolite between grinding, collision come off, rotated with transfer roller, crystallizing and drying salt is through outer barrel sieve
It sinks to bottom of towe to collect and discharge.The moisture being evaporated is discharged with hot-air, the preheated device recycling heat of High Temperature Moist Air of discharge
Dehumidified air direct emission is obtained, 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 concentrate of atomizing spray to pellet surface is dried, and carries the wet full of moisture
With air from humid air export discharge, salinity fluidisation state inertia spherolite surface crystallization drying it is hardened after with spherolite grinding,
Collision comes off collects cone bucket through the crystallization that outer barrel mesh screen sinks to bottom of towe.Air cleaner is used for air filtration, and wind turbine is used for
Power is provided for air.On the one hand preheater tentatively preheats desulfurization wastewater concentrate for collecting the heat of humid air, another
Aspect carries out dehumidification by condensation, the air direct emission of dehumidifying to humid air.Heat exchanger is used for the desulfurization wastewater to air or preheating
Concentrate is heated to required temperature, and 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
Tower height is reduced, reduces equipment investment and occupied space, needs to improve Air Fluidized crystallizing and drying efficiency, air inlet modulating mechanism and row
Gas modulating mechanism can play this effect.Inlet gas distributed modulation device, exit gas distributed modulation device respectively include centre
Modulation axis body and set on modulation axis body surrounding modulation blade.Exit gas distributed modulation device is located at inlet gas distributed modulation
The vertical direction of device, is all located on the center line of tower body；Entrance guiding plate is located at inlet gas distributed modulation in vertical direction
Below device, face air intake pipe in horizontal direction；It exports deflector and is located at exit gas distributed modulation in vertical direction
Above device, face air exhaust pipeline in horizontal direction；Air enters from admission line blows to entrance guiding plate by horizontal fluidised form
It guides as vertical fluidised form, then blows to inlet gas distributed modulation device rotation is modulated to by vertical ascent fluidised form and rise fluidised form, with spray
Exit gas distributed modulation device, outlet deflector discharge are blowed to successively after drenching the sphere padding mass transfer of concentrate.Exit gas point
The modulation axis body of cloth modulator and a pair of virtual bearing of the modulation axis body picture of inlet gas distributed modulation device, inlet gas distribution are adjusted
Device processed, exit gas distributed modulation device make air-flow be modulated into cyclone flow patterns jointly, realize efficient mass transfer heat transfer, make air inlet/outlet more
Uniformly, space availability ratio greatly improves in tower, effectively reduces tower height degree.The centre of the modulation axis body of inlet gas distributed modulation device
For cylinder, both ends are semicircle sphere or cone, can be with enhanced modulation blade to the rotation modulation intensity of gas, exit gas
The lower end semicircle sphere or cone of the modulation axis body of distributed modulation device have same effect.
Advantages of the present invention：
1st, 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；2nd, anti-fouling performance is extremely strong：Heat and mass main body-inertia
Sphere padding in micro- floating state in tower, and is moved with transfer roller, and anti-fouling performance is extremely strong；3rd, process equipment is simple, small investment, accounts for
Ground area is small；4th, stable and reliable operation；5th, 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 be desulfurization wastewater concentrate fluidized crystallization drying system structure diagram (desulfurization wastewater concentrate is only pre-
Heat)；
Fig. 2 be desulfurization wastewater concentrate fluidized crystallization drying system structure diagram (desulfurization wastewater concentrate preheat simultaneously
Heating)；
Fig. 3 is the structure diagram of inlet gas distributed modulation device；
Fig. 4 is the structure diagram of the modulation blade of inlet gas distributed modulation device；
Fig. 5 is the structure diagram of inlet gas distributed modulation device and entrance guiding plate；
Fig. 6 is exit gas distributed modulation device and the structure diagram for exporting deflector；
Fig. 7 is the structure diagram of transfer roller；
Fig. 8 is the dispensing orifice end view of inner cylinder and distributing valve structure diagram；
Fig. 9 is the structure diagram of the end face opposite with dispensing orifice of inner cylinder；
Figure 10 is inner cylinder and hydrojet pipeline, the structure diagram of distributing valve；
Figure 11 is the connection relation of fluidized crystallization drying tower and bubble column in Fig. 1 fluidized crystallization drying systems；
Figure 12 is the connection relation of fluidized crystallization drying tower and bubble column in Fig. 2 fluidized crystallization drying systems；
Wherein, 21- entrance guidings plate, 22- outlets deflector, 23- modulation axis bodies, 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,
The pipeline of 38- inlet openings, 39- stirring blades, 40- scraper plates, 41- connection hydrojet pipelines and dispensing orifice, 42- desulfurization wastewater concentrates
Entrance, 43- stirring blades.
Specific embodiment
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.
Following embodiments are by taking desulfurization wastewater as an example, and carrier gas is by taking air as an example.
A kind of desulfurization wastewater concentrate fluidized crystallization drying system of air direct emission as shown in Figure 1, including air into
Gas unit, desulfurization wastewater concentrate feed liquor unit and fluidized crystallization drying tower and air-heating unit, desulfurization wastewater concentrate add
Hot cell；
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 cylinder 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 cylinder and outer barrel
There is the sphere padding that grain size is more than 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 with 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 connects；The periphery wall of the inner cylinder be additionally provided with for sphere padding is stirred in rotation stirring blade (such as Fig. 7-
Shown in 10)；
The air inlet unit includes air cleaner and wind turbine, and air-heating unit includes First Heat Exchanger, air
Enter tower body by the air inlet of air cleaner, wind turbine, heat exchanger from fluidized crystallization drying tower successively；The First Heat Exchanger
Also connected with the heat source heated for air；
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 on
Preheater in desulfurization wastewater concentrate input duct, the preheated device preheating of desulfurization wastewater concentrate enter the transfer roller in tower body
In；The preheater also with the humid air outlet of fluidized crystallization drying tower, after the preheated device dehumidification by condensation of humid air directly
Discharge.
The desulfurization wastewater concentrate fluidized crystallization drying system of a kind of air direct emission as shown in Figure 2, in Fig. 1 systems
On the basis of, the desulfurization wastewater concentrate heating unit further includes the second heat exchange in desulfurization wastewater concentrate input duct
Device enters after the preheated device preheating of desulfurization wastewater concentrate, the heating of the second heat exchanger in the transfer roller in tower body；Second heat exchange
Device is also connected with the heat source heated for desulfurization wastewater concentrate.
In fluidized crystallization drying system shown in Fig. 1 and 2, the fluidized crystallization drying system further include set on tower body into
Air inlet modulating mechanism at gas port and the bleed modulation mechanism (as seen in figures 3-6) set on tower body humid air exit；
The air inlet modulating mechanism include inlet gas distributed modulation device and it is multiple be set on inlet gas distributed modulation device under
Side is used for entrance guiding plate of the horizontal gas flow guiding for uprush；The bleed modulation mechanism includes exit gas distribution and adjusts
Device processed and multiple be set on above exit gas distributed modulation device are used for outlet deflector of the uprush guiding for horizontal gas flow；
The inlet gas distributed modulation device, exit gas distributed modulation device respectively include intermediate modulation axis body and are set on
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 on the lower end of cylinder, is used for including multiple be in tilted layout 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；It is heated for air or desulfurization wastewater concentrate
Heat source is hot water, steam or heat smoke；Scraper plate of the outer tube inner wall bottom equipped with multiple raising sphere paddings grindings, collision efficiency.
The preheater is the connection relation such as figure of multistage bubble column heat exchanger, fluidized crystallization drying tower and bubble column
11st, being equipped with multiple coiled tube condensers from bottom to top shown in 12, in multistage bubble column, (the present embodiment is condensed using finned coil formula
The tubular type or plate-type condenser of device or other forms, such as：Coiler type condenser, fin plate condenser, plate and frame are cold
Condenser etc.), the bottom of multistage bubble column is equipped with cold inlet, from bottom to top equipped with multiple heat corresponding to each coiled tube condenser
Inflow entrance, the cold inlet are desulfurization wastewater concentrate entrance, and the hot inlet is communicated in fluidisation knot by pipeline respectively
The humid air of different temperatures is extracted at the different height of brilliant drying tower, and correspondence is communicated in multiple hot inlets respectively from bottom to top
The top-down humid air extraction opening of fluidized crystallization drying tower；The side of multistage bubble column is equipped with condensation production water out, and top is set
The dehumidified air for having cooling exports and the outlet of the thermally desulfurizing Waste water concentrating liquid of preheating.
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 heat exchanger, enters using the hot-air as carrier gas from the air inlet of fluidized crystallization drying tower, turns
Sphere padding is blown into micro- floating fluidisation state between roller inner/outer tube；Desulfurization wastewater concentrate by preheating, which is distributed to be arranged in, to be turned
Atomizer on roller inner cylinder, atomizing spray to sphere padding surface carry out heat and mass with hot-air, and moisture is taken away by hot-air
Obtain wet saturated air, the salinity in concentrate is hardened in fluidisation state sphere padding surface crystallization drying, with inner cylinder rotation and
The flowing of hot-air, between salt lease making sphere padding grinding, collision come off and sink through outer barrel mesh screen to the crystallization collection of bottom of towe
Cone bucket, after the wet preheated device phase-change heat-exchange of saturated air condensation form condensed water and dehumidified air, dehumidified air direct emission.
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；Pressure gauge, thermometer should be configured in different operating section.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
The rubber or plastics of concentration selection 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 concentrate of atomizing spray to pellet surface is dried, and carries the wet full of moisture
With air from humid air export discharge, salinity fluidisation state inertia spherolite surface crystallization drying it is hardened after with spherolite grinding,
Collision comes off collects cone bucket through the crystallization that outer barrel mesh screen sinks to bottom of towe.Air cleaner is used for air filtration, and wind turbine is used for
Power is provided for air.On the one hand preheater tentatively preheats desulfurization wastewater concentrate for collecting the heat of humid air, another
Aspect carries out dehumidification by condensation, the air direct emission of dehumidifying to humid air.Heat exchanger is used for the desulfurization wastewater to air or preheating
Concentrate is heated to required temperature, and 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
Tower height is reduced, reduces equipment investment and occupied space, needs to improve Air Fluidized crystallizing and drying efficiency, air inlet modulating mechanism and row
Gas modulating mechanism can play this effect.Inlet gas distributed modulation device, exit gas distributed modulation device respectively include centre
Modulation axis body and set on modulation axis body surrounding modulation blade.Exit gas distributed modulation device is located at inlet gas distributed modulation
The vertical direction of device, is all located on the center line of tower body；Entrance guiding plate is located at inlet gas distributed modulation in vertical direction
Below device, face air intake pipe in horizontal direction；It exports deflector and is located at exit gas distributed modulation in vertical direction
Above device, face air exhaust pipeline in horizontal direction；Air enters from admission line blows to entrance guiding plate by horizontal fluidised form
It guides as vertical fluidised form, then blows to inlet gas distributed modulation device rotation is modulated to by vertical ascent fluidised form and rise fluidised form, with spray
Exit gas distributed modulation device, outlet deflector discharge are blowed to successively after drenching the sphere padding mass transfer of concentrate.Exit gas point
The modulation axis body of cloth modulator and a pair of virtual bearing of the modulation axis body picture of inlet gas distributed modulation device, inlet gas distribution are adjusted
Device processed, exit gas distributed modulation device make air-flow be modulated into cyclone flow patterns jointly, realize efficient mass transfer heat transfer, make air inlet/outlet more
Uniformly, space availability ratio greatly improves in tower, effectively reduces tower height degree.The centre of the modulation axis body of inlet gas distributed modulation device
For cylinder, both ends are semicircle sphere or cone, can be with enhanced modulation blade to the rotation modulation intensity of gas, exit gas
The lower end semicircle sphere or cone of the modulation axis body of distributed modulation device 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：
1st, 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；2nd, anti-fouling performance is extremely strong：Heat and mass main body-inertia
Sphere padding in micro- floating state in tower, and is moved with transfer roller, and anti-fouling performance is extremely strong；3rd, process equipment is simple, small investment, accounts for
Ground area is small；4th, stable and reliable operation；5th, 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 (10)
1. a kind of Waste water concentrating liquid stream crystallizing and drying system of air direct emission, it is characterised in that：Including air inlet list
Member, Waste water concentrating 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 goes out equipped with humid air
Mouthful；Tower body is internally provided with the transfer roller being made of inner cylinder 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 cylinder 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 with 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 successively with the inlet opening
It is logical；The periphery wall of the inner cylinder is additionally provided with the stirring blade for being stirred in rotation to sphere padding；
The air inlet unit includes air cleaner and wind turbine, and air-heating unit includes First Heat Exchanger, and air is successively
Air inlet by air cleaner, wind turbine, heat exchanger from fluidized crystallization drying tower enters tower body；The First Heat Exchanger also with
Heat source connection for 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 on Waste water concentrating liquid input duct
On preheater, the preheating of Waste water concentrating liquid preheated device enters in the transfer roller in tower body；The preheater is also done with fluidized crystallization
The humid air outlet of dry tower, direct emission after the preheated device dehumidification by condensation of humid air；
The air is carrier gas, carrier gas or use flue gas, helium, argon gas, nitrogen, CO2Or the gases such as steam.
2. fluidized crystallization drying system according to claim 1, it is characterised in that：The Waste water concentrating liquid heating unit is also
Including the second heat exchanger being set in Waste water concentrating liquid input duct, the preheated device preheating of Waste water concentrating liquid, the second heat exchanger add
Enter in the transfer roller in tower body after heat；Second heat exchanger is also connected with the heat source heated for Waste water concentrating liquid.
3. fluidized crystallization drying system according to claim 1 or 2, it is characterised in that：It further includes set on tower body air inlet
The air inlet modulating mechanism at place and the bleed modulation mechanism set on tower body humid air exit；
The air inlet modulating mechanism includes inlet gas distributed modulation device and multiple be set below inlet gas distributed modulation device is used
In by horizontal gas flow guiding for uprush entrance guiding plate；The bleed modulation mechanism includes exit gas distributed modulation device
It is used for above exit gas distributed modulation device by outlet deflector of the uprush guiding for horizontal gas flow with multiple；
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 on cylinder is modulated, is used for including multiple be in tilted layout 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.
4. fluidized crystallization drying system according to claim 3, 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.
5. fluidized crystallization drying system according to claim 3, it is characterised in that：Stirrup and outer in the modulation vanes
Stirrup is equidistantly circumferentially fixed and the lower end of cylinder that is set in gas distributed modulation device.
6. fluidized crystallization drying system according to claim 3, it is characterised in that：The modulation axis body is hollow structure.
7. fluidized crystallization drying system according to claim 1 or 2, it is characterised in that：Add for air or Waste water concentrating liquid
The heat source of heat is hot water, steam or heat smoke.
8. fluidized crystallization drying system according to claim 1 or 2, it is characterised in that：Outer tube inner wall bottom is equipped with multiple
The grinding of raising sphere padding, the scraper plate of collision efficiency.
9. fluidized crystallization drying system according to claim 1 or 2, it is characterised in that：The preheater is multistage bubble-cap
Tower heat exchanger is equipped with multiple condensers in multistage bubble column from bottom to top, and the bottom of multistage bubble column is equipped with cold inlet, from
It is lower and equipped with multiple hot inlets corresponding to each condenser, the cold inlet is Waste water concentrating liquid entrance, the hot-fluid
Entrance is communicated in the humid air that different temperatures is extracted at the different height of fluidized crystallization drying tower, and multiple heat by pipeline respectively
Correspondence is communicated in the top-down humid air extraction opening of fluidized crystallization drying tower to inflow entrance respectively from bottom to top；Multistage bubble column
Side is equipped with condensation production water out, and top is equipped with the thermal wastewater concentrated solution outlet of the dehumidified air outlet and preheating of cooling.
10. a kind of Waste water concentrating liquid stream crystallizing and drying method using any systems of claim 1-9, feature exists
In：Air is heated from air inlet unit to obtain hot-air through heat exchanger, is dried using the hot-air as carrier gas from fluidized crystallization
The air inlet of tower enters, and sphere padding is blown into micro- floating fluidisation state between transfer roller inner/outer tube；Waste water concentrating liquid by preheating
The atomizer being arranged on transfer roller inner cylinder is distributed to, atomizing spray to sphere padding surface carries out heat and mass, water with hot-air
Point take away to obtain wet saturated air by hot-air, the 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, between salt lease making sphere padding grind, collide come off and through outer barrel mesh screen sink to
Cone bucket is collected in the crystallization of bottom of towe, is condensed after the wet preheated device phase-change heat-exchange of saturated air and is formed condensed water and dehumidified air, dehumidified
Air direct emission；Air is carrier gas, carrier gas or use flue gas, helium, argon gas, nitrogen, CO2Or the gases such as steam.
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| CN108178218B (en) | 2023-06-30 |
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