CN106986401A - A kind of method for treating desulfurized wastewater - Google Patents
A kind of method for treating desulfurized wastewater Download PDFInfo
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- CN106986401A CN106986401A CN201710288666.5A CN201710288666A CN106986401A CN 106986401 A CN106986401 A CN 106986401A CN 201710288666 A CN201710288666 A CN 201710288666A CN 106986401 A CN106986401 A CN 106986401A
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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
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A20/138—Water desalination using renewable energy
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Abstract
The invention discloses a kind of method for treating desulfurized wastewater, belong to desulfurization wastewater process field.Hot air units are passed through hot-air into phase transformation generator;At the same time, waste water system delivers to desulfurization wastewater after the atomizer atomization in phase transformation generator, the hot blast formed with hot-air is exchanged by caloic, gas phase is become by liquid phase, as hot blast is discharged from phase transformation generator exports, impurity in desulfurization wastewater crystallizes the solid to be formed, under gravity into the solids outlet port hot air units hot air units of phase transformation generator.Hot-air and the desulfurization wastewater drop of atomization carry out matter, heat exchange in a kind of method for treating desulfurized wastewater disclosed by the invention, phase transformation generator, and gas solid separation is carried out after the evaporation of desulfurization wastewater drop, crystallization.The present invention is solved breaks the problem of original desulfurization balances and causes equipment corrosion during flue processing desulfurization wastewater, it is achieved thereby that no pollution and the zero-emission of desulfurization wastewater.
Description
Technical field
The invention belongs to desulfurization wastewater process field, more specifically to a kind of method for treating desulfurized wastewater.
Background technology
Coal electricity chemical enterprise is applied during desulfurization technology in production can produce a certain amount of desulfurization wastewater, desulfurization wastewater composition
Complexity, mainly contains high concentration suspended matter, oversaturated sulphite, soluble chloride and fluoride and various heavy
Impurity, wherein being much the first pollutant for requiring in national environmental standard strictly to control.Accordingly, it would be desirable to enter to desulfurization wastewater
The strict processing of row, can be only achieved desulfurization wastewater " zero-emission " standard of national requirements.The difficulty in treatment of desulfurization wastewater mainly has water
Matter, water are influenceed greatly by coal-fired, desulphurization system moisturizing and desulfurization operation condition, and variation water quality scope is very big;Concentration of suspension is high,
Fine particle ratio is big;Silicon, magnesium, organic matter isoconcentration are high, and calcium sulfate degree of supersaturation is high, and fouling tendency is strong.Desulfurization wastewater tradition
Complex treatment process, operation operational ton is big, is difficult to automatically control, most power plant's operation results are undesirable, and the waste water after processing is still
The right chlorion containing higher concentration, the corrosivity to metal and equipment is stronger.
Common FGD desulfurization wastewater treatment systems are " three header processing+clarification " technique, and three headers include neutralizing case, reaction
Case and flocculation tanks;The desulfurization wastewater that FGD eddy flows are stood out carries out aeration in waste water buffer pool and is well mixed, and then passes through waste water
Three headers are pumped to, feeding lime breast or sodium hydroxide in the neutralization case of three headers, quick stirring make the desulfurization of original acidity
Waste water is in alkalescence (pH is controlled 9.0~9.5), and most of heavy metal forms sl. sol. hydroxide and sunk from waste water during this
Shallow lake comes out, and neutralizes water outlet in case and, from reaction chamber is flow to, adds organic sulfur and flocculating agent in reaction chamber, it is impossible to hydroxide shape
The residual heavy metal of formula precipitation is removed in the form of sulfide precipitation, and reaction chamber water outlet enters flocculation tanks, is added in flocculation tanks
Flocculation aid, carries out flocculation reaction under slow-speed of revolution stirring, promotes flco further to grow up, and flocculation tanks water outlet gravity flow enters clarification
Device, waste water flco is further grown up in clarifier, and carries out precipitation separation by top swash plate, and top clear water is adjusted through acid adding
Gravity flow enters clear water reserviors after pH to 6~9, and clarifier sludge delivers to filter press and carries out press filtration.
The technique waste water of this pretreatment is only capable of handling suspension, but can not handle the chlorion in desulfurization wastewater, also not
Can directly it discharge, it is necessary to which advanced treating, advanced treating is used after above-mentioned pretreatment at present, then softens+membrane distillation+evaporative crystallization group
Handling process is closed, technology investment height (waste water per ton makes an investment in ten thousand yuan/ton of waste water of 70-200), high energy consumption, operating cost is high (every
Ton wastewater treatment is taken in 130-220 members/t waste water), and easily cause systemic breakdown the problems such as equipment blocking, corrosion and scaling.
Foreign countries also have a small amount of using flue facture, i.e., desulfurization wastewater is sprayed onto after air preheater, the cigarette before electric precipitation
Allow waste water to evaporate on road, the technique is entered in desulphurization system due to waste water, not only break original desulfurization wastewater balance, and chlorine from
Son can produce enrichment, it is necessary to increase more wastewater treatment capacities, it is also possible to corrode upstream device.
Chinese invention patent, publication number:105417604A, publication date:On March 23rd, 2016, disclose and utilize more than flue gas
The method and device of desulfurization wastewater is heat-treated, is specifically included:Boiler, air preheater, electric cleaner, desulfurizing tower and chimney, its feature
It is, an evaporation concentration device is set between electric cleaner and desulfurizing tower;In the bottom of evaporation concentration device, concentration is set
Desulfurization wastewater collecting pit;In desulfurization wastewater pond and evaporation concentration device, pipeline and water pump II are set;Air preheater and deduster it
Increase nozzle in Jian Yan lanes, pipeline and water pump I are set between nozzle and concentration desulfurization wastewater collecting pit.The present invention's is beneficial
Have the technical effect that and save the chemicals that Conventional waste water processing method is used;Overcome existing fume afterheat evaporation technique spray
Mist amount is big, and the problems such as deduster leading portion flue-gas temperature is low, water vapour content is high, pole plate of dust remover is hardened reaches truly
Desulfurization wastewater zero-emission.Its weak point is:(1) desulfurization wastewater enters and can break original de- in desulphurization system in the technique
Sulfur balance, and chlorion is also easy to produce enrichment, corrosion pipeline, thus need to increase more wastewater treatment capacities, with flushing pipe
Wall;(2) chlorion is entered in desulfurization wastewater by combustion system with flue gas after handling, and cl concn can not be reduced, and be directly affected de-
Sulphur efficiency, corrodes desulphurization plant, reduces the desulphurization plant life-span;(3) directly desulfurization wastewater is passed through in cigarette lane, smoke content is big,
Flying dust is easily deposited, and easily causes the blocking of cigarette lane;(4) desulfurization wastewater drop needs the cigarette lane evaporative crystallization of certain length, and actual
Cigarette lane is shorter, and the evaporation of desulfurization wastewater drop is incomplete, and unevaporated desulfurization wastewater drop is bonded with the flying dust in flue gas, thus pole
Yi Duiyan lanes and upstream device, for example, electric cleaner etc. causes corrosion.
Chinese invention patent, publication number:105692745A, publication date:On June 22nd, 2016, disclose a kind of hybrid
Flue gas is evaporated desulfurization wastewater device and method, specifically includes:Gaseous mixture is evaporated desulfurization portion and the quenched desulfurization portion of gas, and gaseous mixture steams
Dry desulfurization portion includes drying tower, Wastewater Pretreatment pipeline and mixed gas pipeline, and drying tower passes through offgas duct and flue main pipe
Lead to, gaseous mixture pipeline includes supervisor, the first branch pipe and leads to and flow through the second of the air preheater with outside air
The outside air of branch pipe, flue gas and heating is mixed and fed into drying tower and desulfurization wastewater is carried out to be evaporated processing.Effectively solve mixing
The wall sticking phenomenon that gas occurs in evaporation drying desulfurization wastewater, it is ensured that drying tower service life, moreover it is possible to effectively reduce because using outer
Influence of boundary's air to boiler efficiency, effectively improves desulfuration efficiency, moreover it is possible to reduces desulfurization wastewater amount, and then mitigates evaporation operation
Live load, reduces the thermal losses for evaporating desulfurization wastewater.Its weak point is:(1) atomizer is arranged on outside drying tower
Portion, desulfurization wastewater forms drop through atomization, drop easily diffusion pollution environment in atmosphere;(2) flue gas and preheated air
The mixed gas of formation and the desulfurization wastewater of atomization react, and react the smaller particle solids of generation easily with gases such as vapor
Flue main pipe is entered by offgas duct, thus easily causes the blocking of flue main pipe;(3) solid small particles thing enters flue and downstream is set
It is standby, the abrasion of flue and upstream device is easily caused, so as to influence service life of equipment;(4) if temperature is relatively low in flue, vapor
Condense, dissolving forms salting liquid to solid particulate matter in the vapor of condensation again, and salting liquid is easily set to flue or downstream
It is standby to cause corrosion.
The content of the invention
1st, the problem of solving
Enter for waste water in existing desulfurization wastewater processing procedure in desulphurization system, broken original desulfurization and balanced and cause
The problem of equipment corrosion, the present invention provides a kind of method for treating desulfurized wastewater.It will not enter original system, to desulphurization system without
Any influence.
2nd, technical scheme
To solve the above problems, the present invention is adopted the following technical scheme that:
A kind of method for treating desulfurized wastewater, hot air units are passed through hot-air into phase transformation generator;At the same time, waste water
System delivers to desulfurization wastewater after the atomizer atomization in phase transformation generator, and the hot blast that hot-air is formed is handed over by caloic
Change, gas phase is become by liquid phase, as hot blast is discharged from phase transformation generator exports, the impurity in desulfurization wastewater crystallizes consolidating of being formed
Body, under gravity into the solids outlet port of phase transformation generator.
Hot-air and the desulfurization wastewater mass heat transfer after atomization, realize the phase transformation of desulfurization wastewater, this process no pollution, zero
Discharge, and in the absence of pipe-line equipment etching problem, realize that environmental protection and energy saving are handled, water environment will not be polluted.
Preferably, high-temperature gas enters the entrance of passage one of the heat collector of hot air units, the entrance of passage two of heat collector
Air is blasted, air forms hot-air, passage two of the hot-air from heat collector in heat collector after the preheating of high-temperature gas
Outlet discharge, into phase transformation generator, high-temperature gas enters absorption tower from the outlet of passage one of heat collector.
The present apparatus utilizes high-temperature gas, such as industrial high temperature flue gas, and flue gas before such as desulfurization carries out pre- thermosetting heat to air
Air, hot-air enters phase transformation generator and matter thermal response generation solid particle occurs for the desulfurization wastewater of atomization, and liquid is evaporated
Moisture discharge is formed into air, the energy has both been saved, the temperature of flue gas before desulfurization is reduced again, desulfurization effect is favorably improved
Rate.
Preferably, the water pump of waste water system extracts the desulfurization wastewater in the waste water tank of waste water system and is delivered to phase transformation
Desulfurization wastewater is atomized by the atomizer in device, atomizer, is easy to that matter, heat exchange fully occur with hot-air, the water of desulfurization wastewater
Point forming moisture discharge is gone out, and any pollution will not be caused to environment.
Preferably, the desulfurization wastewater of atomization mixes progress matter, heat with the hot blast that hot-air is formed in phase transformation generator
Exchange, desulfurization wastewater is undergone phase transition, the moisture evaporation in desulfurization wastewater, impurity and salinity crystallization generation solid in desulfurization wastewater
Particle, a part of solid particle is fallen on phase transformation generator solids outlet port, vapor and another part solid by Action of Gravity Field
Grain from phase transformation generator exports enters gas-solid separator with hot blast.Wherein, a part of solid particle refers to bulky grain solid, i.e.,
The solid particle fallen by Action of Gravity Field;Another part solid particle refers to solid small particles, i.e., rise together with vapor
To the solid particle of phase transformation generator exports.
Outlet at the top of phase transformation generator is connected with gas-solid separator, and the bulky grain solid generated in phase transformation generator is direct
Drop into phase transformation generator bottom solids outlet port, solid small particles and vapor divide from phase transformation generator exports into gas-solid
From device.
Preferably, phase transformation generator exports are connected with gas-solid separator, and vapor enters gas with a part of solid small particles
Separated after solid separator, solid small particles enter gas-solid separator bottom ash bucket, moisture discharge is gone out.
Under blower fan air blast and the effect of phase transformation generator internal negative pressure, solid small particles and vapor enter gas-solid separator
Afterwards, vapor and solid small particles are separated, and solid small particles enter gas-solid separator bottom ash bucket, gas-solid separator bottom
The solid particle that ash bucket gathers periodically is discharged, unified to be handled.
Preferably, atomizer is connected with compressed air unit, and desulfurization wastewater is drawn into atomizer, the compression through water pump
The desulfurization wastewater is atomized by air with atomizer collective effect, enhances desulfurization wastewater atomizing effect, so as to generate diameter more
Desulfurization wastewater drop that is small, being more evenly distributed, so that hot-air is fully contacted with desulfurization wastewater drop, and then promote hot-air with
The matter of desulfurization wastewater drop, heat exchange.
Preferably, heat collector hot air units are provided with temperature-detecting device, temperature detection dress with phase transformation generator connectivity part
Put detection hot air units output hot air temperature, by the temperature control of hot-air more than 80 DEG C, so as to for hot-air with
The matter thermal response of desulfurization wastewater drop provides temperature conditionss.
Preferably, temperature-detecting device is provided with phase transformation generator exports, temperature-detecting device detection steam temperature will
Steam temperature control is sent out higher than more than 10 DEG C of dew-point temperature so as to effectively prevent the vapor after mass heat transfer in phase transformation
Condensed in raw device, so that vapor can be smoothly discharged to outside phase transformation generator by hot wind action.
Preferably, the pipeline that the waste water tank of waste water system is connected with atomizer is provided with regulating valve, and regulating valve is according to phase transformation
Temperature-detecting device at generator exports, controls the flow of desulfurization wastewater, on the one hand, prevent phase transformation generator is atomization from taking off
The steam temperature that sulphur waste water and hot-air react generation is too low and cause water vapor condensation to condense, and influences matter thermal response.
Preferably, the gas-solid separator connected with phase transformation generator exports includes ash discharging hole and exhaust outlet, the ash discharging hole
The bottom of the gas-solid separator is arranged on, the exhaust outlet is arranged on the top of the gas-solid separator, the heat collector
The entrance of passage two, the heat collector and the connectivity part of the phase transformation generator, the phase transformation generator and the gas-solid separator
Connectivity part and the gas-solid separator exhaust ports at least one at position be provided with blower fan.
Normal temperature air is incorporated into heat collector and preheated by blower fan, while blower fan is sent out into phase transformation warmed-up air
Facilitation is also played in raw device.In addition, blower fan is additionally aided the mixed of the vapor after mass heat transfer and solid small particles
Compound, by wind action from gas-solid separator is brought into phase transformation generator, while promoting gas-solid separator by vapor
Discharge.
3rd, beneficial effect
Compared to prior art, beneficial effects of the present invention are:
(1) method for treating desulfurized wastewater that the present invention is provided, the atomizer that desulfurization wastewater is set through phase transformation generator top
Atomization generation drop, drop is sprayed by phase transformation generator, and hot gas enters phase transformation by the hot gas inlet of phase transformation generator bottom
In device, hot-air and desulfurization wastewater droplets mixing simultaneously carry out matter, heat exchange, and desulfurization wastewater drop thermal dehydration is formed after being evaporated
The solid particle of sulfur-bearing, chlorine, solid particle directly falls into the solids outlet port of phase transformation generator bottom under gravity, and water steams
Gas is discharged under blower fan blasting action by phase transformation generator exports, and the matter of desulfurization wastewater and hot-air, heat exchanging process need not
Into flue, thus desulphurization reaction balance will not be destroyed, it also avoid causing flue corrosion, and desulfurization wastewater and hot gas are anti-
The solid particle that should be generated is easy to collect recycling, so as to reach the purpose for making full use of resource;
(2) method for treating desulfurized wastewater that the present invention is provided, utilizes high-temperature gas, such as industrial high temperature flue gas, such as desulfurization
Preceding flue gas, is preheated to air, and preheated air enters phase transformation generator and the desulfurization wastewater reaction generation solid of atomization
Particle, the present apparatus both saves the energy, and the temperature of flue gas before desulfurization is reduced again, lower temperature is provided for desulfurization, is conducive to
Desulfuration efficiency is improved, technique water consumption is decreased;
(3) desulfurization wastewater is delivered to the mist in phase transformation generator by the method for treating desulfurized wastewater that the present invention is provided, water pump
Change device be atomized, heat collector (1) export hot-air be atomized by atomizer after waste water system desulfurization wastewater in phase
Become mixing in generator and occur mass heat transfer, form vapor and solid particle, vapor passes through phase transformation generator top exit
Discharge, solid particle is discharged by the solids outlet port of phase transformation generator bottom;Phase transformation generator provides place for mass heat transfer,
After mass heat transfer, desulfurization wastewater is undergone phase transition, and the liquid phase of script has not existed, and the hot blast of hot-air formation takes vapor out of,
Solid particle is fallen by Action of Gravity Field, realizes the environmental protection and energy saving processing of desulfurization wastewater;Technological process is simple, realizes no pollution zero-emission
Put;In addition to the desulfurization wastewater pipeline that waste water system is connected with atomizer, remaining process whole process dry state, by the possibility of equipment corrosion
Reduction;
(4) method for treating desulfurized wastewater that the present invention is provided, phase transformation generator exports are connected with gas-solid separator, phase transformation hair
The bulky grain solid generated in raw device directly drops into phase transformation generator bottom solids outlet port, solid small particles and vapor
Enter gas-solid separator under blower fan blasting action, process engineering simplifies, do not add extra chemical reagent, processing cost drop
It is low;
(5) method for treating desulfurized wastewater that the present invention is provided, after blower fan starts, solid small particles and vapor are roused in blower fan
Enter gas-solid separator under wind effect, solid small particles fall into gas-solid separator ash discharging hole under gravity, and vapor is in wind
Discharged under machine effect by exhaust outlet, so as to be sufficiently separated the solid particle for reclaiming generation, it is to avoid the outer blowdown of less solid particle
Contaminate environment;
(6) method for treating desulfurized wastewater that the present invention is provided, desulfurization wastewater is drawn into atomizer, compressed air through water pump
Unit provides compressed air for atomizer, and compressed air is mixed with desulfurization wastewater further promotes desulfurization wastewater atomization, atomization
The liquid-drop diameter of generation is smaller, be more evenly distributed, so that promote desulfurization wastewater drop carries out matter, heat exchange with hot gas;
(7) method for treating desulfurized wastewater that the present invention is provided, in heat collector, industrial high temperature flue gas heats normal temperature air
To 80 DEG C of hot-airs formed above, hot-air is passed into phase transformation generator, to provide temperature conditionss for matter thermal response.
(8) method for treating desulfurized wastewater that the present invention is provided, temperature-detecting device monitors and feeds back phase transformation in real time!
The temperature of exit vapor, thus the temperature value fed back according to temperature-detecting device, adjust hot air units to phase transformation in time
The desulfurization wastewater amount that the air capacity and waste water system being passed through in generator are conveyed to atomizer, it is ensured that phase transformation generator endoplasm
The temperature of the vapor generated after thermal response is consistently higher than dew-point temperature more than 10 DEG C, it is to avoid temperature is too low in phase transformation generator,
So as to prevent that the temperature in phase transformation generator of the vapor after mass heat transfer is too low and condenses, so that vapor can pass through hot blast
Effect be smoothly discharged to outside phase transformation generator;
(9) method for treating desulfurized wastewater that the present invention is provided, is provided with regulating valve and flowmeter between water pump and atomizer,
Temperature-detecting device is provided with phase transformation generator exports, by governor valve control desulfurization wastewater flow, and then passes through observed temperature
The steam temperature of reaction generation in the temperature value that detection means is detected, control phase transformation generator, so that it is guaranteed that atomization is de-
The steam temperature that sulphur waste water and hot-air solid/liquid/gas reactions are generated is all the time more than dew-point temperature, so as to effectively prevent vapor gas
Generation condensation and dewfall, is easy to vapor to be discharged into time outside phase transformation generator, realizes moisture and solid impurity in desulfurization wastewater
Be completely separated;
(10) normal temperature air is introduced and preheated in heat collector by the method for treating desulfurized wastewater that the present invention is provided, blower fan,
Preheated air is blasted progress matter thermal response in phase transformation generator in the presence of blower fan, and blower fan is endlessly to phase transformation
Hot-air is blasted in generator, so as to help, by the vapor and the mixture of solid small particles after mass heat transfer, blasting
Flowing hot-air in the presence of from gas-solid separator is brought into phase transformation generator, the mixture in phase transformation generator is continuous
Entrance gas-solid separator, vapor is discharged so as to promote gas-solid separator;
(11) agitator is provided with the method for treating desulfurized wastewater that the present invention is provided, waste water tank, is precipitated to prevent desulfurization wastewater,
The desulfurization wastewater of even in liquid phase distribution is formed, water pump pumps out the desulfurization wastewater in waste water tank, passes through desulfurization wastewater pipeline
To the atomizer in phase transformation generator, the flow of the governor valve control desulfurization wastewater on desulfurization wastewater pipeline, flowmeter is used to see
The flow of desulfurization wastewater is surveyed, by the flow monitoring effect of the flow control action of regulating valve, and flowmeter, in conjunction with phase transformation
Temperature-detecting device in generator is measured to temperature value, it is therefore prevented that the vapor after mass heat transfer is in phase transformation generator
Condensation, so that the hot blast effect that vapor can be formed by hot-air is smoothly discharged to outside phase transformation generator.
Brief description of the drawings
Fig. 1 is desulfurizing waste water processing device schematic diagram.
In figure:1st, heat collector;2nd, phase transformation generator;3rd, gas-solid separator;4th, blower fan;5th, waste water tank;6th, water pump;7th, adjust
Valve;8th, flowmeter;9th, atomizer;10th, compressed air unit.
Embodiment
The present invention is further described below with reference to specific embodiment.
Embodiment 1
Such as Fig. 1, a kind of desulfurizing waste water processing device, including waste water system, in addition to phase transformation generator 2 and hot-air list
Member, the top of the phase transformation generator 2 is provided with outlet, and the bottom of phase transformation generator 2 is provided with solids outlet port, the phase
Become generator 2 to connect with hot air units, the waste water system is connected with the atomizer 9 in phase transformation generator 2.
The hot-air of hot air units output is sent out with the desulfurization wastewater by the waste water system after the atomization of atomizer 9 in phase transformation
Mass heat transfer occurs for mixing in raw device 2, forms vapor and solid particle, and vapor is arranged by the top exit of phase transformation generator 2
Go out, solid particle is discharged by the solids outlet port of the bottom of phase transformation generator 2;Phase transformation generator 2 provides place for mass heat transfer,
After mass heat transfer, desulfurization wastewater is undergone phase transition, and the liquid phase of script has not existed, and the hot blast of hot-air formation takes vapor out of,
Solid particle is fallen by Action of Gravity Field, realizes the environmental protection and energy saving processing of desulfurization wastewater;Technological process is simple, realizes no pollution zero-emission
Put;Except waste water system with addition to the desulfurization wastewater pipeline that atomizer 9 is connected, remaining process whole process dry state, by the possibility of equipment corrosion
Property reduction.
Embodiment 2
Such as Fig. 1, a kind of desulfurizing waste water processing device of the present embodiment, compared with Example 1 compared with addition to compressed air list
Member 10, the compressed air unit 10 is connected with the atomizer 9.
Compressed air unit 10 is passed into atomizer 9, enhances desulfurization wastewater atomizing effect so that desulfurization wastewater is formed
More small drop, occurs more sufficient matter thermal response, so as to desulfurization wastewater so as to the drop of hot-air and desulfurization wastewater
In moisture more thoroughly formed vapor evaporate.
Embodiment 3
Such as Fig. 1, a kind of desulfurizing waste water processing device of the present embodiment further changes on the basis of embodiment 1 or 2
Enter, in addition to gas-solid separator 3 and blower fan 4, the described front end of gas-solid separator 3 and the outlet of phase transformation generator 2 are described
The rear end of gas-solid separator 3 connected with blower fan 4.
After mass heat transfer, impurity and salinity crystallization generation solid particle in desulfurization wastewater, solid particle include bulky grain
Solid and solid small particles, bulky grain solid refer to the solid particle by hot blast and Action of Gravity Field whereabouts, and solid small particles are
Refer to the solid particle risen together with vapor, bulky grain solid is fallen on the solids outlet port of phase transformation generator 2 by Action of Gravity Field,
Vapor and solid small particles are as hot blast is from the outlet of phase transformation generator 2 into gas-solid separator 3, and gas-solid separator 3 steams water
Gas is separated with solid small particles, and blower fan 4 discharges the vapor that gas-solid separator 3 is separated by wind action.
Described one end of blower fan 4 can also be connected with gas-solid separator 3, the other end of blower fan 4 goes out with phase transformation generator 2
Mouth connection;Blower fan 4 is by the vapor and the mixture of solid small particles after mass heat transfer, by wind action from phase transformation generator
It is brought into 2 in gas-solid separator 3, while promoting gas-solid separator 3 to discharge vapor.
The porch of passage two of heat collector 1, the connectivity part of the heat collector 1 and the phase transformation generator 2, the phase transformation are sent out
Raw device 2 is provided with position at least one in the connectivity part of the gas-solid separator 3 and the exhaust ports of the gas-solid separator 3
Blower fan 4.Embodiment 4
Such as Fig. 1, a kind of desulfurizing waste water processing device of the present embodiment, in the base of any one technical scheme of embodiment 1-3
It is further improved on plinth, described waste water system includes waste water tank 5, water pump 6, regulating valve 7 and flowmeter 8, waste water tank 5 and phase
Become on the pipeline that the atomization device 9 of generator 2 is connected and be sequentially provided with water pump 6, regulating valve 7 and flowmeter 8.
Agitator is provided with waste water tank 5, is precipitated to prevent desulfurization wastewater, the desulfurization wastewater of even in liquid phase distribution, water pump 6 is formed
Desulfurization wastewater in waste water tank 5 is pumped out, passes through desulfurization wastewater pipeline to the atomization device 9 of phase transformation generator 2, desulfurization wastewater
Regulating valve 7 on pipeline controls the flow of desulfurization wastewater, and flowmeter 8 is used for the flow for observing desulfurization wastewater, passes through regulating valve 7
Flow control action, and flowmeter 8 flow monitoring effect, in conjunction with the temperature value in phase transformation generator 2, control is realized
Prevent the vapor after mass heat transfer from being condensed in phase transformation generator 2, so that vapor can smoothly be arranged by hot wind action
Go out to outside phase transformation generator 2.
Embodiment 5
Such as Fig. 1, a kind of desulfurizing waste water processing device of the present embodiment, in the base of any one technical scheme of embodiment 1-4
It is further improved on plinth, the hot air units include heat collector 1, the heat collector 1 includes passage one and passage two, passage
One entrance is connected with high-temperature gas (such as industrial high temperature flue gas), and the outlet of passage one is connected with absorption tower, and the entrance of passage two is passed through often
Warm air, the outlet of passage two is connected with the phase transformation generator 2.
In heat collector 1, normal temperature air is heated to 80 DEG C of hot-airs formed above by industrial high temperature flue gas, and hot-air is passed through
Into phase transformation generator 2, to provide temperature conditionss for matter thermal response.On the other hand, high-temperature flue gas is taking heat with normal temperature air
Carried out in device 1 after heat exchange, the reduction of industrial high temperature flue-gas temperature, then the high-temperature flue gas that temperature is reduced is passed through in absorption tower, entered
Row desulfurization process, the technique water consumption cooled to high-temperature flue gas is also reduced, thus reduces industrial high temperature flue gas desulfurization
The cost of processing.
Blower fan is connected with the entrance of passage two, and normal temperature air is blown into heat collector 1 by the wind of blower fan, while entering to hot-air
Enter phase transformation generator 2 and also function to facilitation;Blower fan can also be arranged on passage two and export between the phase transformation generator 2,
Hot-air is smoothly brought into phase transformation generator 2 by the wind of blower fan, to occur matter thermal response.
Embodiment 6
Such as Fig. 1, a kind of desulfurizing waste water processing device of the present embodiment, any scheme in embodiment 1-5 in can using, this
A kind of control system of desulfurizing waste water processing device of embodiment, including water pump 6, in addition to controller, regulating valve 7, flowmeter
8th, compressed air unit 10, temperature-detecting device, blower fan 4 and heat collector 1, described controller and water pump 6, regulating valve 7, flow
Meter 8, compressed air unit 10, temperature-detecting device, blower fan 4 and heat collector 1 are electrically connected.
Controller controls the open and close of water pump 6, realizes the control that phase transformation whether is participated in desulfurization wastewater, controller control
Regulating valve 7 processed adjusts the flow of desulfurization wastewater, and the real-time traffic for the desulfurization wastewater that flowmeter 8 is monitored feeds back to controller, controls
What the flow value for the compressed air that device control compressed air unit 10 is passed through, controller control rotation speed of fan and heat collector 1 were passed through
Temperature value in phase transformation generator 2 is fed back to controller by hot air flowrate, temperature-detecting device, so as to controller combination flow
The real-time flow data of the desulfurization wastewater of the feedback of meter 8, and then the flow that valve 7 adjusts desulfurization wastewater is controlled to adjust, prevent mass heat transfer
Vapor afterwards condenses in phase transformation generator 2, the smooth row of hot blast effect that can be formed so as to vapor by hot-air
Go out to outside phase transformation generator 2.
Embodiment 7
Such as Fig. 1, a kind of control system of desulfurizing waste water processing device of the present embodiment, make on the basis of embodiment 6 into
One step is improved, and temperature-detecting device is provided with the phase transformation generator 2.
Temperature in temperature-detecting device monitoring phase transformation generator 2, to feed back to controller, prevents temperature too low, matter heat
Vapor after exchange condenses in phase transformation generator 2, so that vapor can smoothly be discharged to phase transformation by hot wind action
Outside generator 2.
Embodiment 8
Such as Fig. 1, a kind of control system of desulfurizing waste water processing device of the present embodiment, any technology in embodiment 6-7
It is further improved on the basis of scheme, described temperature-detecting device is separately positioned on the exit of phase transformation generator 2, Yi Jisuo
State phase transformation generator 2 and hot air units connectivity part.
The steam temperature value for the temperature-detecting device monitoring that phase transformation generator 2 is exported feeds back to controller, another temperature
Detection arrangement monitors hot air temperature is spent, controller controls to adjust the flow of valve 7, so that steam temperature is higher than dew-point temperature 10
DEG C so that, prevent condensation, hot air temperature be higher than 80 DEG C, to undergo phase transition desulfurization wastewater.
Embodiment 9
Such as Fig. 1, a kind of control system of desulfurizing waste water processing device of the present embodiment, any technology in embodiment 6-8
It is further improved on the basis of scheme, after controller control water pump 6 is opened, controller control compressed air unit 10 is opened,
The blower fan at compressed air, controller control heat collector 1 is passed through into phase transformation generator 2 to open, and normal temperature is sent into heat collector 1
Air, control industrial high temperature flue gas is passed into heat collector 1, heats normal temperature air, and controller receives temperature-detecting device feedback
Temperature value, compared with dew-point temperature, control to adjust valve 7 aperture, and then monitor flowmeter 8 numerical value so that phase transformation send out
The temperature that raw device 2 is exported is higher than dew-point temperature more than 10 DEG C.Described temperature-detecting device is separately positioned on phase transformation generator 2
Exit, and the phase transformation generator 2 and hot air units connectivity part.
Embodiment 10
Such as Fig. 1, a kind of desulfurizing waste water processing device of the present embodiment, any scheme in embodiment 1-5 in can using, this
A kind of control system of desulfurizing waste water processing device of embodiment, can use any technical scheme, the present embodiment in embodiment 6-9
A kind of method for treating desulfurized wastewater, hot air units are passed through hot-air into phase transformation generator 2;At the same time, waste water system
Desulfurization wastewater is delivered to after the atomizer 9 in phase transformation generator 2 is atomized, and the hot blast that hot-air is formed is exchanged by caloic,
Gas phase is become by liquid phase, discharged as hot blast is exported from phase transformation generator 2, the impurity in desulfurization wastewater crystallizes to form solid,
Enter the solids outlet port of phase transformation generator 2 in the presence of gravity.
Hot-air and the desulfurization wastewater mass heat transfer after atomization, realize the phase transformation of desulfurization wastewater, this process no pollution, zero
Discharge, realizes that environmental protection and energy saving are handled, will not pollute water environment.
Embodiment 11
Such as Fig. 1, a kind of method for treating desulfurized wastewater of the present embodiment is made on the basis of any technical scheme of embodiment 10
Further improve, high-temperature gas (can use industrial high temperature flue gas) enters the entrance of passage one of the heat collector 1 of hot air units,
The entrance of passage two of heat collector 1 blasts air, and air forms heat sky in heat collector 1 after the preheating of industrial high temperature flue gas
Gas, hot-air exports discharge from the passage two of heat collector 1, into phase transformation generator 2, and industrial high temperature flue gas is from heat collector 1
The outlet of passage one enters absorption tower.
Embodiment 12
Such as Fig. 1, a kind of method for treating desulfurized wastewater of the present embodiment, on the basis of any technical scheme of embodiment 10 and 11
On be further improved, the desulfurization wastewater that the water pump 6 of waste water system is extracted in waste water tank 5 is simultaneously delivered in phase transformation generator 2
Desulfurization wastewater is atomized by atomizer 9, atomizer 9.
Embodiment 13
Such as Fig. 1, a kind of method for treating desulfurized wastewater of the present embodiment, on the basis of any technical schemes of embodiment 10-12
On be further improved, the hot blast that desulfurization wastewater and the hot-air of atomization are formed mix in phase transformation generator 2 carries out matter, heat
Exchange, desulfurization wastewater is undergone phase transition, the moisture evaporation formation vapor in desulfurization wastewater, impurity and salinity knot in desulfurization wastewater
Crystalline substance generation solid particle, solid particle includes bulky grain solid and solid small particles, and (bulky grain solid refers to by hot blast and again
The solid particle that power effect is fallen, solid small particles refer to the solid particle risen together with vapor), bulky grain solid is by weight
Power is acted on, and falls on the solids outlet port of phase transformation generator 2, and vapor and solid small particles are exported with hot blast from phase transformation generator 2
Into gas-solid separator 3.
Embodiment 14
Such as Fig. 1, a kind of method for treating desulfurized wastewater of the present embodiment, on the basis of any technical schemes of embodiment 10-13
On be further improved, phase transformation generator 2 outlet connected with gas-solid separator 3, vapor is separated with solid small particles,
Solid small particles enter the bottom ash bucket of gas-solid separator 3, and periodically discharge, is uniformly processed.
Embodiment 15
Such as Fig. 1, a kind of method for treating desulfurized wastewater of the present embodiment, on the basis of any technical schemes of embodiment 10-14
On be further improved, atomizer 9 is connected with compressed air unit 10, and desulfurization wastewater is drawn into atomizer 9 through water pump 6, pressure
The desulfurization wastewater is atomized by the compressed air in contracting air element 10 with the collective effect of atomizer 9.
Embodiment 16
Such as Fig. 1, a kind of method for treating desulfurized wastewater of the present embodiment, on the basis of any technical schemes of embodiment 10-15
On be further improved, hot air units and the connectivity part of phase transformation generator 2 are provided with temperature-detecting device in phase transformation generator 2,
The hot air temperature of temperature-detecting device detection hot air units output, by the temperature control of hot-air more than 80 DEG C, so as to
With the desulfurization wastewater after atomization matter thermal response occurs for hot-air.
Embodiment 17
Such as Fig. 1, a kind of method for treating desulfurized wastewater of the present embodiment, on the basis of any technical schemes of embodiment 10-16
On be further improved, the exit of phase transformation generator 2 be provided with temperature-detecting device, temperature-detecting device detection steam temperature,
By steam temperature control higher than more than 10 DEG C of dew-point temperature, prevent Water vapor condensation from condensing, fall together with solid particle
Or stay in phase transformation generator 2, realize being completely separated for moisture and solid in desulfurization wastewater.
Embodiment 18
Such as Fig. 1, a kind of method for treating desulfurized wastewater of the present embodiment, on the basis of any technical schemes of embodiment 10-17
On be further improved, the pipeline that waste water tank 5 is connected with atomizer 9 be provided with regulating valve 7, regulating valve 7 is according to phase transformation generator 2
The temperature-detecting device in exit, controls the flow of desulfurization wastewater, prevents that temperature is too low in phase transformation generator 2, causes vapor
Condensation.
Embodiment 19
Such as Fig. 1, a kind of method for treating desulfurized wastewater of the present embodiment, on the basis of any technical schemes of embodiment 10-18
On be further improved, include ash discharging hole and exhaust outlet, the ash discharge with the gas-solid separator 3 of the outlet of phase transformation generator 2
Mouth is arranged on the bottom of the gas-solid separator 3, and the exhaust outlet is arranged on the top of the gas-solid separator 3, described to take heat
The entrance of passage two, the connectivity part of the heat collector 1 and the phase transformation generator 2, the phase transformation generator 2 and the gas of device 1
In the connectivity part of solid separator 3 and the exhaust ports of the gas-solid separator 3 at least one at position be provided with blower fan 4, in this reality
Apply in example, blower fan 4 is connected with the exhaust outlet of gas-solid separator 3, set blower fan 4 to send out from heat collector 1, phase transformation successively herein
Raw device 2 to the space of gas-solid separator 3 forms negative pressure section, it is ensured that normal temperature air enters after the passage two of heat collector 1 along negative
Section flowing is pressed, the mixture of vapor and solid small particles that generation is avoided to a certain extent leaks.
When setting blower fan 4 in the way of being mentioned in the present embodiment, due to the effect of negative pressure section, normal temperature air will in a steady stream not
Hot-air is formed after disconnected entrance heat collector 1 is preheated to enter in phase transformation generator 2 in progress matter thermal response, phase transformation generator 2
Original air then flow in gas-solid separator 3 and discharged, no matter therefore blower fan 4 be located at the passage two of heat collector 1 and enter
Mouth, heat collector 1 and the connectivity part of phase transformation generator 2, the connectivity part and gas-solid separator 3 of phase transformation generator 2 and gas-solid separator 3
Rear end in any position, or multiple positions wherein are equipped with blower fan 4, and blower fan 4 both contributes to draw normal temperature air
Enter into heat collector 1 and preheated, while 4 pairs of warmed-up air of blower fan, which enter, also plays promotion work in phase transformation generator 2
With.In addition, blower fan 4 is additionally aided the vapor and the mixture of solid small particles after mass heat transfer, pass through air flow
Effect is brought into out of phase transformation generator 2 in gas-solid separator 3, while promoting gas-solid separator 3 to discharge vapor.
Embodiment 20
Such as Fig. 1, a kind of desulfurizing waste water processing device of the present embodiment is made in embodiment 1-5 on the basis of any scheme
Further improvement, in addition to gas-solid separator 3 and blower fan 4, the described front end of gas-solid separator 3 and going out for phase transformation generator 2
Mouth connection, the entrance of passage two of the heat collector 1, the connectivity part of the heat collector 1 and the phase transformation generator 2, the phase transformation
Generator 2 is provided with wind with position at least one in the connectivity part of the gas-solid separator 3 and the rear end of the gas-solid separator 3
Machine 4, in the present embodiment, blower fan 4 is connected with the rear end of gas-solid separator 3.
In the set-up mode of blower fan 4 mentioned above, due to the effect of negative pressure section, normal temperature air, which endlessly enters, takes heat
Hot-air is formed after device 1 is preheated enter and matter thermal response is carried out in phase transformation generator 2, original air is then in phase transformation generator 2
Flow in gas-solid separator 3 and discharge, no matter therefore blower fan 4 be located at the entrance of passage two of heat collector 1, heat collector 1 with
Connectivity part, phase transformation generator 2 and the appointing in the connectivity part of gas-solid separator 3 and the rear end of gas-solid separator 3 of phase transformation generator 2
One position, or multiple positions wherein are equipped with blower fan 4, and blower fan 4 both contributes to normal temperature air being incorporated into heat collector 1
It is interior to be preheated, while 4 pairs of warmed-up air of blower fan, which enter in phase transformation generator 2, also plays facilitation;In addition, blower fan
4 additionally aid the vapor and the mixture of solid small particles after mass heat transfer, are sent out by the effect of air flow from phase transformation
It is brought into raw device 2 in gas-solid separator 3, while promoting gas-solid separator 3 to discharge vapor.
For example, the blower fan 4 of the connectivity part setting in heat collector 1 and phase transformation generator 2, one side blower fan 4 and heat collector 1
The outlet of passage two, normal temperature air is introduced and preheated in the passage two of heat collector 1, the work of preheated air in blower fan 4
Matter thermal response is carried out with lower blasted in phase transformation generator 2, blower fan 4 endlessly blasts hot-air into phase transformation generator 2,
So as to contribute to the vapor and the mixture of solid small particles after mass heat transfer, the slave phase under the mobilization for blasting air
Become in generator 2 and be brought into gas-solid separator 3, air endlessly then promotes gas solid separation into gas-solid separator 3
Device 3 discharges vapor.
Embodiment 21
Such as Fig. 1, a kind of method for treating desulfurized wastewater of the present embodiment, including heat collector 1, the normal temperature air in heat collector 1
Heat exchange is carried out with industrial high temperature flue gas, industrial high temperature flue-gas temperature, the normal temperature air formation hot-air of heat external, heat is reduced
Air enters phase transformation generator 2, in phase transformation generator 2, and the desulfurization wastewater and hot-air after atomization carry out being sufficiently mixed heat
Mass transter, undergoes phase transition, the vapor of discharge with the mixture of solid small particles after gas-solid separator 3 is separated, row up to standard
Put, the solid of collection is uniformly processed.
The nucleus equipment of present invention process is phase transformation generator 2:In technique in the present invention, desulfurization wastewater is by water pump 6
After (compression pump can be used) supercharging, deliver in phase transformation generator 2 and sprayed after atomization, carried out after fully being contacted with hot-air mixing
Matter, heat exchange, desulfurization wastewater become solid phase by liquid phase, complete flash evaporation and instantaneous dry.So as to obtain solid particle.Big solid
Particle is discharged from phase transformation generator 2, and small solid particle is reclaimed through gas-solid separator 3, and small solid particle is received by gas-solid separator 3
Collection, clean tail gas is extracted out by blower fan to be emptied.
In certain desulfurization case, former industrial high temperature flue-gas temperature is 150 DEG C, and exhaust gas volumn is 800000Nm3/ h, produces desulfurization
Wastewater flow rate (solid content is 3%, and chlorine ion concentration is 20000mg/L) 2t/h.Normal temperature air 50000Nm3/ h, through over-heat-exchanger
After (i.e. heat collector 1), air themperature is 145 DEG C, after the evaporation of phase transformation generator 2, flue gas (i.e. vapor and small solid particle
Mixture) temperature is reduced to 65 DEG C, higher than 12 DEG C of dew-point temperature, the diameter 2.8m of phase transformation generator 2, height 4m, atomizer 9 is adopted
With single-phase flow spray gun or two-phase flow spray gun, two-phase flow spray gun is used in the present embodiment, gas-solid separator 3 uses sack cleaner,
Filter area is 720m2, concentration of emission is less than 5mg/Nm3, dust (i.e. small solid particle) collects 60kg/h, and fan pressure head is
3000Pa, flow is 55000m3/ h, motor (is used to drive blower fan to rotate) power 75kW, is calculated by 0.5 yuan of electricity is often spent, ton water
Processing cost reduces by 2 DEG C less than 20 yuan/t, former industrial high temperature flue-gas temperature.
Claims (10)
1. a kind of method for treating desulfurized wastewater, it is characterised in that:Hot air units are passed through hot-air into phase transformation generator (2);
At the same time, waste water system delivers to desulfurization wastewater after atomizer (9) atomization in phase transformation generator (2), and hot-air institute shape
Into hot blast by caloic exchange, gas phase is become by liquid phase, with hot blast from phase transformation generator (2) export discharge, desulfurization wastewater
In impurity crystallize the solid to be formed, under gravity into the solids outlet port of phase transformation generator (2).
2. method for treating desulfurized wastewater according to claim 1, it is characterised in that:High-temperature gas enters hot air units
The entrance of passage one of heat collector (1), the entrance of passage two of heat collector (1) blasts air, and air is in heat collector (1) by industry
Hot-air is formed after the preheating of high-temperature flue gas, hot-air exports discharge from the passage two of heat collector (1), into phase transformation generator
(2) in, high-temperature gas enters absorption tower from the outlet of passage one of heat collector (1).
3. method for treating desulfurized wastewater according to claim 1, it is characterised in that:The water pump (6) of waste water system extracts useless
Desulfurization wastewater in the waste water tank (5) of water system and the atomizer (9) being delivered in phase transformation generator (2).
4. a kind of processing method of desulfurization wastewater according to claim 1, it is characterised in that:The desulfurization wastewater of atomization and heat
The hot blast that air is formed mixing in phase transformation generator (2) carries out matter, heat exchange, and desulfurization wastewater is undergone phase transition, desulfurization wastewater
In moisture evaporation, impurity and salinity crystallization generation solid particle in desulfurization wastewater, a part of solid particle by Action of Gravity Field,
Fall on phase transformation generator (2) solids outlet port, vapor and another part solid particle go out with hot blast from phase transformation generator (2)
Mouth enters gas-solid separator (3).
5. method for treating desulfurized wastewater according to claim 1, it is characterised in that:Phase transformation generator (2) is exported and gas-solid
Separator (3) is connected, and vapor is separated after entering gas-solid separator (3) with a part of solid particle, and solid particle enters
Gas-solid separator (3) bottom ash bucket, moisture discharge is gone out.
6. method for treating desulfurized wastewater according to claim 1, it is characterised in that:Atomizer (9) and compressed air unit
(10) it is connected, desulfurization wastewater is drawn into atomizer (9) through water pump (6).
7. a kind of processing method of desulfurization wastewater according to claim 1, it is characterised in that:Heat collector (1) hot-air list
Member is provided with temperature-detecting device with phase transformation generator (2) connectivity part, and the heat of temperature-detecting device detection hot air units output is empty
Temperature degree, by the temperature control of hot-air more than 80 DEG C.
8. method for treating desulfurized wastewater according to claim 1, it is characterised in that:Phase transformation generator (2) exit is provided with
Temperature-detecting device, temperature-detecting device detection steam temperature, by steam temperature control higher than 10 DEG C of dew-point temperature with
On.
9. method for treating desulfurized wastewater according to claim 1, it is characterised in that:The waste water tank (5) and mist of waste water system
The pipeline for changing device (9) connection is provided with regulating valve (7).
10. method for treating desulfurized wastewater according to claim 2, it is characterised in that:With phase transformation generator (2) outlet
Gas-solid separator (3) include ash discharging hole and exhaust outlet, the ash discharging hole is arranged on the bottom of the gas-solid separator (3), institute
State the top that exhaust outlet is arranged on the gas-solid separator (3), the entrance of passage two, the heat collector (1) of the heat collector (1)
The connectivity part and institute of connectivity part, the phase transformation generator (2) with the gas-solid separator (3) with the phase transformation generator (2)
State position at least one in the exhaust ports of gas-solid separator (3) and be provided with blower fan (4).
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