CN108117215A - High-salt wastewater cycles tubulation atmospheric evaporation decrement treatment method and apparatus - Google Patents
High-salt wastewater cycles tubulation atmospheric evaporation decrement treatment method and apparatus Download PDFInfo
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- CN108117215A CN108117215A CN201711423047.9A CN201711423047A CN108117215A CN 108117215 A CN108117215 A CN 108117215A CN 201711423047 A CN201711423047 A CN 201711423047A CN 108117215 A CN108117215 A CN 108117215A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/043—Details
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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
- C02F1/08—Thin film 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
- C02F1/10—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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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Abstract
The present invention announces a kind of high-salt wastewater Xun Huan tubulation atmospheric evaporation decrement treatment method and apparatus, and tubulation atmospheric evaporation concentration step is cycled using chemical coagulation physical filtering.The atmospheric evaporation tower especially used is to be entered by the air of dry higher enthalpy value under high-power shaft flow fan effect in tower, gas transfers heat to waste water in tower, partial heat needed for waste water evaporation is provided, the air of low enthalpy value high humility is extracted out by wind turbine afterwards, the evaporation capacity of recycling waste water is improved with this, achievees the purpose that concentration.Method and apparatus using the present invention can effectively solve the problems, such as that high-salt wastewater is handled in economic and technical.
Description
Technical field
The present invention relates to industrial wastewater pollution processing, more particularly to environmental protection technical fields, technology at high-salt wastewater decrement
With equipment.
Background technology
High-salt wastewater refer to from the total salinity of sanitary sewage and industrial wastewater be more than 1% waste discharge, containing compared with
It is high such as Cl-, SO4 2-, Na+, Ca2+Inorganic ions are waited, also containing some organic matters such as glycerine, middle low-carbon chain compound etc..Mainly
From the acquisition for directly utilizing industrial production, domestic water and the food processing factory of seawater, chemical plant and oil and natural gas
Processing etc..These high-salt wastewaters if unprocessed direct discharge, will certainly give birth to aqueous bio, Drinking Water and industrial or agricultural
Fisheries water generates greatly harm.But since its complicated component is various, salinity is high, therefore the wastewater processing technology difficulty is more than general
Logical sewage disposal is much greater.
Research and common high-salt wastewater method have electroosmose process, membrane separation process, evaporation and bioanalysis etc. at present.Electric osmose
Analysis method is applied much in the industrial production, but electroosmose process is very high to raw water requirement, and in general oil content will be less than 2mg/
L must be limited to one to salt content and be scheduled below concentration, and otherwise production cost raises rapidly；Membrane separation process is an advanced place
Reason technology, there is certain potentiality in high-salt wastewater treatment technology, and current main problem is equipment costliness, processing procedure is easily stifled,
It is easy to pollute, and the processing of high concentration salt bearing liquid wastes is difficult；Biochemical method facility is huge, complex treatment process, operating cost increase, and is
The drawbacks of can not be ignored；Evaporation such as negative pressure evaporation, mechanical pressurization evaporate, and also have that energy consumption is larger when being handled, investment
The problems such as higher.
China's high-salt wastewater generates quantity in total waste water up to 5%, is still increased every year with 2% rate.Therefore, it is with high salt useless
Water process has critical role in sewage disposal, is the emphasis and difficult point of wastewater treatment research.With domestic increasingly serious
Environmental problem and the requirement of Environmental control carry out efficient, low-cost processes to high-salt wastewater and compel as industrial development
It is essential and asks.This method is intended to have the characteristics that complicated component, variability and dispersiveness in itself for high-salt wastewater, from economy and skill
It is feasible in art to develop a kind of practical, effective and inexpensive high-salt wastewater atmospheric evaporation technology and device, realize the big of waste liquid
Width minimizing.
The content of the invention
It is an object of the invention to be directed to the problem of existing high-salt wastewater treating capacity is big, a kind of high treating effect, behaviour are provided
Make the high-salt wastewater evaporation decrement treatment method and apparatus easy, easy to remove, processing cost is low, applicability is wide, emphasis is real
Existing wastewater reduction, to solve the problems, such as that high-salt wastewater is handled.
Technical scheme is as follows：
The present invention provides a kind of processing cost low high-salt wastewater evaporation decrement treatment method, using chemical coagulation, physics
Filtering includes with Xun Huan tubulation atmospheric evaporation combination technique, specific steps：
1st, by high-salt wastewater and sodium carbonate (Na2CO3) and aluminium system aluminium polychloride (PAC) and sodium hydroxide (NaOH) mixing
Coagulation pretreatment is carried out into dosing coagulation tank after uniformly, removes the Ca in waste water2+、Mg2+Ion, turbidity, suspended matter etc. into
Point, the impurity such as oils；
2nd, to physical filtering (as used space-changeable type filter) removal precipitation (suspension) substance of the suspension after coagulation, give up
Water enters regulating tank；
3rd, high-salt wastewater after pretreatment send to Xun Huan tubulation atmospheric evaporator and is evaporated concentration, and processing procedure is：
Waste water is first pumped into the spray system in evaporator through water circulating pump, equably sprayed into tower by water distributor be fully atomized it is useless
Water, atomization waste water flow through the heat cycles tubulation for being passed through high-temperature vapour, are filled between heat cycles tubulation under the effect of gravity
There is honeycomb padding, form thin film shape current, increase heat exchange area and heat-exchange time, the air of dry high break value is big
Entered under the action of power Fan by bottom in tower, and control evaporator outlet wind speed waste water flows through filler table in 12-20m/s
The moisture film formed during face and the air of high speed flow carry out heat exchange rapid vaporization and enter gas phase into vapor, realize the steaming of waste water
Hair concentration, air provide a part of heat needed for waste water evaporation, and another part heat has Xun Huan tubulation heating to provide, Zhi Hougao
The air of the low break value of humidity is extracted out from top of tower；Remaining waste water falls back to the cycling header tank of base of evaporator, then by cycling
Water pump is sent into spray system and is recycled；The water droplet carried secretly in air is stopped by the dehydrator in tower, falls after rise and is arranged into heat cycles
Reheated evaporation in pipe.
4th, the waste liquid after being concentrated by evaporation is discharged through cycling the cycle set water tank bottom pipeline of column tube evaporimeter bottom, after progress
Processing.
High-salt wastewater present invention simultaneously provides a set of realization above method cycles tubulation atmospheric evaporation decrement treatment equipment,
It includes being steamed by the sewage pump of pipeline connection, coagulation filling, space-changeable type filter, regulating tank, Xun Huan tubulation air successively
Device, water circulating pump, steam boiler, water softening plant and softening water tank are sent out, respective valves and suction pump on pipeline are set, steamed
Hair device bottom sets automatic water compensating valve and drainpipe.PAC chemicals feeders, sodium carbonate (Na is respectively adopted simultaneously2CO3) chemicals feeder and hydrogen-oxygen
Change sodium (NaOH) with the static mixer on pipeline to be connected, dosing is filled to coagulation by static mixer.
Equipment employs the cycling tubulation atmospheric evaporator of special construction, for square or circular tower structure, evaporator
Tower in wind turbine, water collection device, water distributor, cycle tube still heater, packing area and cycle header tank are set, set outside tower and draw water
Pump.
Wind turbine is axial-flow type high-power blower, is located at evaporator top exit, wind turbine model and power are by required evaporation
Air quantity determines, but the power of wind turbine must assure that evaporator outlet wind speed reaches 12-20m/s.
Water distributor is located at evaporator top, and by being in being formed with water conduit tube and branch pipe and nozzle for dendroid arrangement, nozzle is adopted
With big flow atomizer, moisturizing pipe diameter and nozzle specification are selected according to design water, and nozzle quantity and arrangement are by cloth
Water flow and single-nozzle spray flow determine.
Water collection device is mounted between water distributor and wind turbine, is corrosion-resistant material, is made as waveform.
It cycles in the packing area that tube still heater is mounted in the middle part of evaporator, using band fin anti-corrosion and high temperature resistant, high pressure
Stainless steel or copper tube make, and use shape as disc or U-typed coil arrangement, it is ensured that and the fluid of big flow suppresses Xun Huan,
Tube still heater and tower external heat source unicom are cycled, the length and the number of plies for cycling tubulation are calculated by required heat exchange amount.
The filler of packing area is made of heat safe anti-corrosion material, honeycomb structure, is filled in Xun Huan tubulation heating
Between device coil pipe, cycling tube still heater is surrounded.
Evaporator lower part sets air inlet, and bottom sets cycling header tank.
It is encapsulated outside said structure using anti-corrosion material, forms Xun Huan tubulation atmospheric evaporator unit casing.
Compared with prior art, the present invention it has the characteristics that：
1st, place before the method for the present invention is concentrated using chemical coagulation-physical filtering combination technique as Xun Huan tubulation atmospheric evaporation
Manage step.Water outlet is directly sent into regulating tank after the filtering of space-changeable type filter after coagulation pretreatment, and standby be concentrated by evaporation is used.This work
Skill flow is simple, at low cost, efficient.The overwhelming majority in waste water can be effectively removed by chemical coagulation and depth-type filtration processing
Suspended solid and colloid realize separation of solid and liquid, can effectively improve the evaporation efficiency of waste water, mitigate fouling of evaporator.
2nd, the special atmospheric evaporator for employing the column tube evaporimeter containing cycle of the present invention is as evaporation concentration equipment, to materialization
Processed waste water carries out low-temperature evaporation concentration, and the outer freight volume of waste water is greatly reduced, can effectively reduce processing cost.The present invention's is big
The evaporator or cooling tower that gas evaporator and the prior art often use are structurally different, also there is essential distinction in principle.It is logical
Normal evaporator or cooling tower is to be entered by the air of low break value in tower, and the processing current higher with temperature carry out heat exchange
Afterwards, the hot wind of high break value is extracted out from top, achievees the purpose that cooling processing water water temperature；And the cycling tubulation atmospheric evaporation of the present invention
Device is to be entered by the air of dry higher enthalpy value under high-power shaft flow fan effect in tower, and gas passes heat in tower
Waste water is passed, the partial heat needed for waste water evaporation is provided, the air of low enthalpy value high humility is extracted out by wind turbine afterwards, is carried with this
The evaporation capacity of high circulation waste water, achievees the purpose that concentration.This atmospheric evaporator has several apparent structure innovations, concrete analysis
It is as follows：
(1) this evaporator has to using high-power blower, i.e., to ensure that evaporator outlet wind speed reaches 12-20m/s, this
It is because this evaporator purpose to be achieved is：Waste water evaporates required energy and is not all of being provided by heating tubulation, but
Design heating tubulation only provides part evaporation institute calorific requirement, and a large amount of enthalpies that another part is pumped by high-power blower are higher
Air provides.I.e. in atmospheric evaporator, a required heat part for waste liquid evaporation is conducted heat by air to be provided, and a part is by following
The heating of circular row pipe provides.Since liquid evaporation speed is related with liquid surface air velocity, the flowing velocity of moisture film liquid level air
It is bigger, be more conducive to accelerate evaporation rate, therefore by high-power blower, using the advantage that its wind speed is high, gas flux is big, add
Keen draft leads to, and improves the flowing velocity of water surface air, the water vapour molecule of effusion is made to spread rapidly, maintains evaporation and diffusion power
For constant, do not make its reduction, gas flow and gas flow rate in evaporator can be improved, so as to improve evaporation efficiency, can so save
Heating energy consumption is saved, the energy consumption that total energy consumption is heated offer waste water evaporation institute calorific requirement by heating tubulation more entirely is greatly reduced, this essence
It is the innovation in this evaporator principle.
(2) in order to improve the enthalpy of the air of high-power blower suction, the air inlet of evaporator can first pass through evaporator one side
Set into air duct, into air duct in be provided with air dry combustion method pipe, to being heated into the air in evaporator, further improve
The enthalpy of air and air inlet is made to keep drying, improved so as to be conducive to evaporation efficiency inside evaporator.
(3) the cycling tubulation of this evaporator is arranged in packing area rather than arranged apart, when waste water is drenched into packing area
A longer residence time can be obtained, this time can be utilized by circulating-heating tubulation simultaneously, when lengthening the heating to waste water
Between, while packing area surface area is big, heat transfer area increases after waste water forms moisture film, can improve the efficiency of heating surface.
(4) this evaporator does not carry out additional heating first and is steamed to improve to the waste water by water circulating pump promotion circulated sprinkling
Efficiency is sent out, is because if waste water is first heated, waste water temperature can be more much higher than air themperature, and the heat of water can pass to temperature
Relatively low air causes thermal loss, and waste water evaporation process is an endothermic process, and such case appearance can be unfavorable for waste water
Evaporation, the waste water cycle of this evaporator is to be put into using circulating pump Natural Circulation, while by steam heating tubulation in packing area,
The temperature difference between air and waste water will not be caused, so as to reduce unnecessary heat loss.It is carried in addition, atmospheric evaporator is provided with
Air dry combustion method pipe into air duct, the air into evaporator can be heated one step ahead, improve the enthalpy into evaporator air
Value, the air of entrance, which transfers heat to waste water, can be more advantageous to waste water evaporation endothermic.
(5) filler of honeycomb structure and high-temperature resistant anti-corrosive material is employed in this atmospheric evaporator, service life is long, bee
Nest shape structured packing large specific surface area, the contact area that on the one hand can be effectively increased between waste water and air make hydrone escape machine
It can increase, on the other hand, increase heat exchange area, accelerate evaporation rate.
3rd, operational efficiency of the present invention is high, and clean moisture is directly evaporate into air, processing procedure non-secondary pollution produce
It is raw.
4th, present system is compact-sized, and using skid-mounted type platform, dismounting is easy to assembly, realizes mobile operational process, operation effect
Rate is higher.
5th, operation expense of the present invention is low, and equipment is simple, and flow is short, easy to maintain, and service life is long, whole set process stream
Journey can realize automation control, greatly reduce personnel depaly.
Treatment technology of the present invention is a kind of with high salt to handle using chemical coagulation-physical filtering-high-efficiency evaporating concentration technique
The physical chemistry combination treatment method and equipment of waste water, method and apparatus using the present invention can be in economic and technicals effectively
Solve the problems, such as that high-salt wastewater is handled.
Description of the drawings
Fig. 1 is the schematic diagram of high-salt wastewater Xun Huan tubulation atmospheric evaporation decrement treatment equipment of the present invention.
Fig. 2 is a kind of structure diagram of the Xun Huan tubulation atmospheric evaporator of concrete structure of the present invention.
Fig. 3 is the structure diagram of the Xun Huan tubulation atmospheric evaporator of another concrete structure of the invention.
In figure, 1-sewage pump；2-static mixer；3-coagulation fills；4-space-changeable type filter；5-PAC chemicals feeders；
6-sodium carbonate chemicals feeder；7-sodium hydroxide chemicals feeder；8-regulating tank；9-Xun Huan tubulation atmospheric evaporator, 10-steam
Boiler；11-softening water tank；12-water softening plant；901-axial flow blower；902-shell；903-water collection device；904-cloth
Hydrophone；905-nozzle；906-Xun Huan tubular heat exchanger；907-filler；908-air-inlet grille；909-flowmeter；910—
Water circulating pump；911-make-up cooling water case；912-automatic water replenishing device；913-discharge outlet；914-pedestal；915-pressure gauge；
916-observation window；917-air inlet tube stent；918-into air duct；919-air dry combustion method pipe.
Specific embodiment
It is further illustrated the present invention below in conjunction with attached drawing：
Referring to Fig. 1, high-salt wastewater Xun Huan tubulation atmospheric evaporation decrement treatment equipment includes the sewage connected successively by pipeline
Pump 1, coagulation fill 3, space-changeable type filter 4, regulating tank 8, Xun Huan tubulation atmospheric evaporator 9, steam boiler 10, water softening plant
12 and softening water tank 11.PAC chemicals feeders 5, sodium carbonate (Na is respectively adopted in equipment2CO3) chemicals feeder 6 and sodium hydroxide (NaOH) plus
Medicine machine 7 is connected with the static mixer 2 on pipeline, and 3 dosings are filled to coagulation by static mixer 2.Equipment is in pipeline
Upper setting respective valves and suction pump set automatic water compensating valve and drainpipe steaming 9 hair tower bottom of Xun Huan tubulation atmospheric evaporator.
Referring to Fig. 2, the shell 902 of Xun Huan tubulation atmospheric evaporator 9 is circular tower structure, and axial flow blower is set in tower
901st, water collection device 903, water distributor 904, Xun Huan tube still heater 906, packed bed 907 and Xun Huan header tank 911, tower set pumping outside
Water pump 910.
Wherein, axial flow blower 901 is located at the top of evaporator, is axial-flow type high-power blower, and power of fan needs to ensure to steam
Hair device air outlet velocity reaches 12-20m/s.
Water distributor 904 is located at evaporator top, by being in being formed with water conduit tube and branch pipe and nozzle for dendroid arrangement, nozzle
Using big flow atomizer, moisturizing pipe diameter and nozzle specification are selected according to design water, nozzle quantity and arrangement by
Cloth water flow and single-nozzle spray flow determine.
Water collection device 903 is mounted between water distributor 904 and axial flow blower 901, is corrosion-resistant material, is made as waveform.
Cycle tube still heater 906 be mounted on evaporator in the middle part of, using band fin anti-corrosion and high temperature resistant, high pressure stainless steel or
Copper tube makes, and shape is U-typed coil arrangement, and the length and the number of plies for cycling tubulation are calculated by required heat exchange amount, it is ensured that
The fluid of big flow suppresses Xun Huan, Xun Huan tube still heater and 10 unicom of heat source stream boiler outside tower.
Packed bed 907 is made of heat safe anti-corrosion material, honeycomb structure, is filled in Xun Huan tube still heater
Between coil pipe.Evaporation packed bed has wider passages, and crystallization condition is not achieved in entire evaporation process, packed bed will not be caused to block up
Plug is readily disassembled, rinses and regular maintenance.
Air-inlet grille 908 is arranged on the setting of evaporator lower part, and Xun Huan header tank 911 is located at base of evaporator.
More than structural outer is encapsulated using anti-corrosion material, forms Xun Huan tubulation atmospheric evaporator unit casing 902.
Fig. 3 is another structure type of Xun Huan tubulation atmospheric evaporator 9, on the basis of Fig. 2, is added into air duct
918, it is therefore an objective to improve the temperature for the air being pumped into tower.It is connected into air duct 918 with evaporator at evaporator lower inlet, into
Air duct shell is sealed with evaporator shell junction but detachably, disconnected one side is sealed with anti-corrosion material, into air duct by stent
917 supports need to install air-inlet grille simultaneously into air duct top, air dry combustion method pipe 919 is installed into air duct.
High-salt wastewater is handled using more than equipment and is as follows：
1st, high-salt wastewater is pumped into tubular static mixer 2 and sodium carbonate (Na by sewage pump 12CO3) and aluminium system polymerization chlorine
After the medicaments such as change aluminium (PAC) and sodium hydroxide (NaOH) are mixed, coagulation is carried out into dosing coagulation tank 3, is removed in waste water
Ca2+、Mg2+The impurity such as ion, turbidity, suspended matter, oils.During the coagulation pretreatment, the hydraulic detention time of flocculation process
For 15 ± 5min.
2nd, the suspension after coagulation, which is pumped into, becomes gap pressure filter 4 and removes precipitation (suspension) substance in water removal, goes out space-changeable type mistake
The waste water of filter enters regulating tank 8.
3rd, high-salt wastewater self-regulated water-saving box after pretreatment is pumped to Xun Huan tubulation atmospheric evaporator 9 by water and is steamed
Hair concentration, enters softening water tank 11 by the water of softening equipment 12, enters back into steam boiler 10, the circulating-heating into evaporator
High-temperature vapour is passed through in tubulation.
4th, the waste liquid after evaporation and concentration, the cycle set water tank bottom pipeline through cycling tubulation atmospheric evaporator lower part are arranged
It removes, outward transport processing.Sludge caused by backwash space-changeable type filter carries out outward transport sanitary landfills processing.
Waste water is as follows in the concentration and evaporation processing step of Xun Huan tubulation atmospheric evaporator 9：High-salt wastewater after pretreatment
During into atmospheric evaporator, waste water is first pumped into the spray system 905 of 906 top of circulating-heating tubulation through water circulating pump 910, passes through
Water distributor 904 equably sprays into suitable waste water being fully atomized into tower, and atomization waste water flows through under the effect of gravity to be added
Thermal cycle tubulation 906 is filled with honeycomb padding 907 between heat cycles tubulation, forms thin film shape current, to increase heat exchange
Area and heat-exchange time improve heat exchange efficiency.Spent shower water passes through rapid vapour after fully exchanging heat with air and heat cycles tubulation
Chemical conversion vapor enters gas phase, and the vapor after vaporization is taken away by high-power blower 901, so as to fulfill the evaporation and concentration of waste water.
Remaining waste water falls back to the cycling header tank 911 of base of evaporator, then is sent into spray system 905 by water circulating pump 910 and cycles
It uses.The water droplet carried secretly in air is stopped by water collection device 903, falls after rise in cycling tube still heater and passes through in heating evaporation.Xun Huan
High-temperature vapour is passed into heating tubulation, high-temperature vapour enters cycling tubulation by coil pipe upper steam entrance, with cycling tubulation pipe
Outer spent shower water and air carry out heat exchange, and liquid is gradually condensed by gaseous state, export and flow out from lower steam, pass back into
Softening water tank.Meanwhile dry temperature higher air is entered by bottom inlet air grid 908 in tower (Fig. 2) under the action of wind turbine,
Or into air duct 918 (Fig. 3), filler table is flowed through into the packing area of evaporator, waste water after the heating of air dry combustion method pipe 919
Moisture film is formed during face and air carries out heat exchange, the relatively low air of high humility temperature is extracted out from top, and waste liquid evaporates required
A heat part is conducted heat by air to be provided, and a part is heated by cycling tubulation and provided.Remaining water of waste liquid instills bottom cycle and catchments
In case.The waste water for instilling bottom cycle header tank is pumped into spray system again through water circulating pump, and water Xun Huan is got up, and Xun Huan sprinkling is useless
Water improves evaporation efficiency.In evaporator, the ratio of design treatment water and quantity of circulating water is 1:10, evaporation efficiency 50%.
High-power blower is compared with wind turbine used by common evaporator used by this evaporator, difference lies in：Commonly
Steam in tower only there are one drainage, only by wind turbine is aspirated and draws evaporator by the fan action of evaporator；And
This evaporator uses high-power blower, can improve gas flow and gas flow rate in evaporator, and evaporation rate is empty with liquid level surface
Gas velocity is related, and air velocity is bigger, is more conducive to evaporate；And it is also otherwise varied with conventional evaporator in this evaporator principle,
The required energy of conventional evaporator evaporation is substantially all to be provided by heating tubulation, and an energy part needed for the evaporation of this evaporator
It is provided by heating tube, another part is provided by the higher air of enthalpy, can be saved heating energy consumption, therefore is also required to using more powerful
Wind turbine to provide the gas flow of bigger, but more common evaporator is greatly reduced on total energy consumption；Evaporator fan power needs
According to evaporator packing area height, designed rating size determines, depending on actual conditions evaporator outlet wind speed need to be ensured about in 12-
20m/s, exit wind speed when air outlet velocity is much larger than common evaporator operation.In energy consumption, common evaporator often evaporates 1kg water
The quantity of steam being actually needed is about in 1.2-1.6kg, and this evaporator often evaporates the quantity of steam that 1kg water is actually needed and about exists
0.6-0.8kg, this evaporator overall energy consumption are about the 50%-60% of common evaporator overall energy consumption, and specific effect regards live ring
Border temperature, humidity variation have certain fluctuation.
Claims (9)
1. a kind of high-salt wastewater cycles tubulation atmospheric evaporation decrement treatment method, arranged using chemical coagulation, physical filtering and Xun Huan
Pipe atmospheric evaporation combination technique, step include：
（1）High-salt wastewater and sodium carbonate and aluminium system aluminium polychloride and sodium hydroxide are located in advance into progress coagulation after mixing
Reason removes the Ca in waste water2+、Mg2+The impurity such as the ingredients such as ion, turbidity, suspended matter, oils；
（2）Precipitation is removed with physical filtering to the suspension after coagulation and suspended material, waste water enter regulating tank；
（3）High-salt wastewater after pretreatment send to Xun Huan tubulation atmospheric evaporator and is evaporated concentration：
Waste water is first pumped into the spray system in evaporator through water circulating pump, and fully atomization is equably sprayed into tower by water distributor
Waste water, atomization waste water flow through the heat cycles tubulation for being passed through high-temperature vapour under the effect of gravity, filled between heat cycles tubulation
There is honeycomb padding, form thin film shape current, increase heat exchange area and heat-exchange time, the air of dry high break value is big
Entered under the action of power Fan by bottom in tower, and control evaporator outlet wind speed waste water flows through filler table in 12-20m/s
The moisture film formed during face and swiftly flowing air carry out heat exchange rapid vaporization and enter gas phase into vapor, realize the steaming of waste water
Hair concentration, air provide a part of heat needed for waste water evaporation, and another part heat is heated by cycling tubulation and provided, Zhi Hougao
The air of the low break value of humidity is extracted out from top of tower；Remaining waste water falls back to the cycling header tank of base of evaporator, then by cycling
Water pump is sent into spray system circulating and evaporating；The water droplet carried secretly in air is stopped by the dehydrator in tower, falls after rise and is arranged into heat cycles
The reheated evaporation of pipe surface；
（4）Waste liquid after evaporation and concentration is post-processed.
2. high-salt wastewater as described in claim 1 cycles tubulation atmospheric evaporation decrement treatment method, it is characterised in that：The object
Reason filtering is using the precipitation and suspended material of the suspension after the space-changeable type filter removal coagulation, space-changeable type filter
Generated sludge carries out outward transport sanitary landfills processing.
3. high-salt wastewater as described in claim 1 cycles tubulation atmospheric evaporation decrement treatment method, it is characterised in that：It is described mixed
During solidifying pretreatment, the hydraulic detention time of flocculation process is 15 ± 5min.
4. a kind of high-salt wastewater cycles tubulation atmospheric evaporation decrement treatment equipment, which is characterized in that including being connected successively by pipeline
Sewage pump, coagulation filling, space-changeable type filter, regulating tank, cycle tubulation atmospheric evaporator, steam boiler, water softening
Equipment and softening water tank set respective valves and suction pump on pipeline, automatic water compensating valve and drainpipe are set in base of evaporator；
PAC chemicals feeders, sodium carbonate chemicals feeder and sodium hydroxide is respectively adopted with the static mixer on pipeline to be connected, by quiet
State mixer fills dosing to coagulation；
The Xun Huan tubulation atmospheric evaporator is square or circular tower structure, and the high-power wind of axial-flow type is set in the tower of evaporator
Machine, water collection device, water distributor, Xun Huan tube still heater, packing area and Xun Huan header tank, tower set suction pump outside；The axial-flow type
High-power blower is located at evaporator top exit, and the power of wind turbine need to ensure that evaporator outlet wind speed reaches 12-20m/s；Cloth
Hydrophone is located at evaporator top, and water collection device is mounted between water distributor and axial-flow type high-power blower；It is filler in the middle part of evaporator
Area, the heat safe anti-corrosion material filled with honeycomb structure, Xun Huan tube still heater is arranged in packing area, around by filler
It surrounds, with tower external heat source unicom, the length and the number of plies for cycling tubulation are calculated the Xun Huan tube still heater by required heat exchange amount
It arrives；Evaporator lower part sets air inlet, and base of evaporator sets Xun Huan header tank.
5. high-salt wastewater as claimed in claim 4 cycles tubulation atmospheric evaporation decrement treatment equipment, it is characterised in that：It is described into
Be also associated at air port into air duct, air dry combustion method pipe be installed into air duct, be tightly connected into air duct and evaporator air inlet and
For detachable structure.
6. high-salt wastewater as claimed in claim 4 cycles tubulation atmospheric evaporation decrement treatment equipment, it is characterised in that：Evaporator
Air inlet and the air inlet of air duct is provided with air-inlet grille.
7. high-salt wastewater as claimed in claim 4 cycles tubulation atmospheric evaporation decrement treatment equipment, it is characterised in that：The receipts
Hydrophone is corrosion-resistant material, is made as waveform.
8. high-salt wastewater as claimed in claim 4 cycles tubulation atmospheric evaporation decrement treatment equipment, it is characterised in that：The cloth
Hydrophone is by being in being formed with water conduit tube and branch pipe and nozzle for dendroid arrangement, and nozzle uses big flow atomizer, nozzle number
Amount and arrangement are determined by cloth water flow and single-nozzle spray flow.
9. high-salt wastewater as claimed in claim 4 cycles tubulation atmospheric evaporation decrement treatment equipment, it is characterised in that：It is described to follow
Circular row pipe heater uses band fin anti-corrosion and high temperature resistant, high pressure stainless steel or copper tube make, use shape for disc or
U-typed coil arrangement.
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