CN108314119A - Desulfurization wastewater phase transformation flash crystallization Zero discharging system and method for treating desulfurized wastewater - Google Patents
Desulfurization wastewater phase transformation flash crystallization Zero discharging system and method for treating desulfurized wastewater Download PDFInfo
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- CN108314119A CN108314119A CN201710034509.1A CN201710034509A CN108314119A CN 108314119 A CN108314119 A CN 108314119A CN 201710034509 A CN201710034509 A CN 201710034509A CN 108314119 A CN108314119 A CN 108314119A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 90
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 51
- 230000023556 desulfurization Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007599 discharging Methods 0.000 title claims abstract description 17
- 238000002425 crystallisation Methods 0.000 title claims abstract description 14
- 230000009466 transformation Effects 0.000 title claims abstract description 13
- 230000008025 crystallization Effects 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 150000003839 salts Chemical class 0.000 claims abstract description 46
- 239000013078 crystal Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000007701 flash-distillation Methods 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 238000001704 evaporation Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 5
- 238000010025 steaming Methods 0.000 claims description 4
- 238000011282 treatment Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000011010 flushing procedure Methods 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical class [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
Abstract
The invention discloses a kind of desulfurization wastewater phase transformation flash crystallization Zero discharging system and method for treating desulfurized wastewater.The Zero discharging system of the present invention includes water pump, drum, flash vessel, condenser, salt separator and First Heat Exchanger；Water pump, drum and flash vessel pass sequentially through fluid communication；First Heat Exchanger is set at the top of drum and for heating desulfurization wastewater；Condenser is in fluid communication with flash vessel and is used to condense the not saliferous steam after flash distillation；And salt separator is connected to the lower flow of flash vessel and is used to detach crystal salt and water after flash distillation；Wherein, the waste water that crystal salt is not precipitated is flowed out from the bottom of flash vessel and is mixed with the untreated effluent in pipeline, and the First Heat Exchanger on drum top is flowed into through water pump.The desulfurization wastewater phase transformation flash crystallization Zero discharging system of the present invention can efficiently recycle the salt in water resource and waste water, saved the water consume of power plant, improved system economy, ensure that boiler safety stable operation.
Description
Technical field
The present invention relates to industrial waste water treatments, more particularly to a kind of desulfurization wastewater Zero discharging system and desulfurization
Wastewater treatment method.
Background technology
Thermal power generation occupys an important position in the power generation field in China.The fire coal electricity in 90% or more China at present
Factory uses limestone-gypsum wet flue gas desulfurization technology.In wet fuel gas desulfurizing technology, in order to maintain system stable operation
With guarantee gypsum product quality, need to control Cl in slurries-Chlorine ion concentration cannot excessively high (10000-20000mg/L), therefore
It needs that a part of slurries are discharged, to generate desulfurization wastewater.One coal-burning power plant 600MW, desulfurization wastewater amount is usually on the left sides 6t/h
It is right.Impurity content in desulfurization wastewater is very high, mainly include suspended matter, oversaturated sulphite, sulfate and heavy metal,
Wherein it is much the first pollutant to be controlled in national environmental standard.Traditional method for treating desulfurized wastewater is mainly three
The case precipitation method remove the pollutants such as heavy metal and suspended matter in desulfurization wastewater using neutralization, precipitation, disorderly solidifying technique.But it is discharged
Salt content is still higher.
With the proposition of nearest coal-burning power plant's near-zero release concept, requirement of the society to power plant's environmental emission standard is also more next
Higher, the zero-emission of power plant effluent is also more important.It is directed to the zero discharge treatment of desulfurization wastewater at present, it is main to use two kinds
Method, one is evaporative crystallisation process, and one is flue method of evaporating.
Traditional evaporative crystallisation process, energy consumption is big, easy fouling, of high cost, but can effectively recycle water resource and crystal salt；
Desulfurization wastewater atomization is directly injected to boiler back end ductwork and is evaporated by flue method of evaporating, and solid salt and ash enter together
Power plant's electrostatic precipitator carries out efficient removal, realizes the zero-emission of desulfurization wastewater.This method has simple process and low cost, right
The advantages that power plant's influence on system operation is small.Usual waste water sprays into position and is exported between deduster entrance in air preheater, this section
Flue-gas temperature is at 130 degree or so.But, it is contemplated that the safe operation of flue and the efficiency of dust collection of electrostatic precipitator are required to
Flue-gas temperature, which declines, caused by evaporating waste water is no more than 5 degree, causes evaporation time of the waste water in flue very long, even
Have effluent part fail evaporating completely just and flue dust enter deduster, lead to deduster fouling and seriously corroded, influence power plant
Safe operation.Further, since power plant's operating load is unstable, flue-gas temperature can usually be less than 130 degree, further result in waste water
Evaporation is incomplete, and flue and deduster will appear fouling and corrosion.
Therefore, this field urgent need is developed new, simple for process, at low cost and small or even without influence on power plant's influence on system operation
Desulfurization wastewater Zero discharging system and method for treating desulfurized wastewater.
Invention content
In view of the deficiencies of the prior art, it is an object of the present invention to provide simple in structure, at low cost, the high desulfurization of flash efficiency
Waste water phase transformation flash crystallization Zero discharging system.
In the first aspect of the present invention, the present invention provides a kind of desulfurization wastewater phase transformation flash crystallization Zero discharging system, institutes
The system of stating includes water pump, drum, flash vessel, condenser, salt separator and heat exchanger；
The water pump, drum and the flash vessel pass sequentially through fluid communication；
The heat exchanger is set at the top of the drum and for heating desulfurization wastewater；
The condenser is in fluid communication with the flash vessel and is used to condense the not saliferous steam after flash distillation；And
The salt separator is connected to the lower flow of the flash vessel and is used to detach crystal salt and water after flash distillation；
Wherein,
The waste water that crystal salt is not precipitated is flowed out from the bottom of the flash vessel and is mixed with the untreated effluent in the pipeline
It closes, the heat exchanger on the drum top is flowed into through the water pump.
In another preferred example, the system also includes evaporating heat exchanger, the evaporating heat exchanger is set to the drum
Bottom and for heating water in the drum.
In another preferred example, the system also includes heat exchanger, the heat exchanger is set in the flue of boiler tail,
And it is connect with the evaporating heat exchanger.
The condenser and the cooling tower of power plant are in fluid communication, and the water of the cooling tower from power plant is introduced as cold
Condensate.
Desulfurization wastewater entrance is provided on connecting pipeline of the water pump with the flash vessel, desulfurization wastewater is de- by this
Sulphur waterwater entrance enters pipeline.
In another preferred example, the system also includes electric lock pneumatic device, the electric lock pneumatic device is arranged in the flash distillation
Between device and the salt separator, the crystal salt for the flasher base to be precipitated is delivered to the salt separator.
In another preferred example, the system is connect with flusher, passes through what is deposited in flushing water periodic flushing system
Salinity prevents block system and weakens the exchange capability of heat of heat exchanger.
In another preferred example, the condenser is connect with flusher, by sinking in flushing water periodic flushing condenser
Long-pending salinity prevents from blocking condenser and weakens the exchange capability of heat of condenser.
In another preferred example, vacuum pump is equipped in the condenser.
In another preferred example, the heat exchanger connect forming circuit with the evaporating heat exchanger, is equipped in the circuit
Force (forcing) pump, the cycle for phase change medium in the heat exchanger provide power.
In another preferred example, the flash vessel exit is equipped with heating device.
In another preferred example, the pipeline is anti-corrosion pipeline.
In another preferred example, flow controller is equipped in the system.
In the second aspect of the present invention, the present invention provides a kind of method of the desulfurization wastewater for the treatment of of Power, the methods
Desulfurization wastewater is handled including the use of system as described in the first aspect of the invention.
It should be understood that within the scope of the present invention, above-mentioned each technical characteristic of the invention and have in below (eg embodiment)
It can be combined with each other between each technical characteristic of body description, to form a new or preferred technical solution.As space is limited, exist
This no longer tires out one by one states.
Description of the drawings
Fig. 1 is a kind of typical desulfurization wastewater phase transformation flash crystallization system schematic of the present invention.
It is respectively marked in attached drawing as follows：
1：Pipeline；
2：Water pump；
3：First Heat Exchanger；
4：Salt separator；
5：Electric lock pneumatic device；
6：Condenser；
7：Flash vessel；
8：Drum；
A：Fresh desulfurization wastewater；
B：Cycle saturation waste water；
C：Second heat exchanger；
D：Evaporating heat exchanger.
Specific implementation mode
The present inventor after extensive and in-depth study, develops a kind of desulfurization wastewater phase transformation flash crystallization zero-emission for the first time
System.
The system includes water pump, drum, flash vessel, condenser, salt separator and heat exchanger；Within the system, it takes off
Sulphur waste water passes through flash separation, and the crystal salt in desulfurization wastewater is precipitated, and salt-free steam is condensed as pure water, can return
Receipts recycle；The waste water that crystal salt is not precipitated is mixed with fresh wastewater, carries out flash separation again, realizes following for wastewater treatment
Ring.Steam is carried out after flash distillation to continue condensation, the vacuum state of flash vessel is maintained, to realize that brine efficiently separates.
The present invention is completed on this basis.
Term
As used herein, term " electric lock pneumatic device " is for conveyings such as thermal power plant, chemical plant, cement plant, grain departments
Gas is locked when dry powdery, granular material, even feeding is used.
As used herein, term " flash vessel " is a vacuum-pumping container, when the hot water (waste water) under certain pressure sprays into
Afterwards, it is depressured rapidly, the part sensible heat of water releases, this part excess heat will be absorbed in the form of latent heat, part water
Meeting double evaporation-cooling, obtained steam is flash-off steam.This container and corresponding auxiliary system are " flash vessel ".
Main advantages of the present invention include：
(a) heat exchanger in Zero discharging system of the present invention has very high heat exchange efficiency, and size is small, is favorably used in boiler
The installation of back-end ductwork is particularly suitable for the power plant equipped with low low-level (stack-gas) economizer；
(b) Zero discharging system of the invention realizes efficient indirect communication of the flue gas heat to desulfurization wastewater, fume side with
Waste water side is completely independent separation, is saved to effectively prevent low temperature of the desulfurization wastewater to boiler flue, inside flue
The corrosion of coal device, deduster has ensured the safe and stable operation of power plant system；
(c) condenser in Zero discharging system of the present invention realizes the lasting condensation to the steam flashed off, maintains flash distillation
High vacuum state in device, the flash separation efficiency greatly improved, and moisture can be recycled；The pure water of recycling can be used for mending
Desulfurization slurry water is filled, supplement boiler water supply is can be used for；
(d) solid salt that Zero discharging system flash crystallization of the present invention comes out, purity is high, has and utilizes subsequent recycling
Processing；
(e) Zero discharging system of the invention is simple in structure, at low cost, and transformation is convenient, shutdown maintenance is not needed subsequently, to pot
Stove is run without influence.
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In the following examples, the experimental methods for specific conditions are not specified, usually according to conventional strip
Part, or according to the normal condition proposed by manufacturer.Unless otherwise stated, otherwise percentage and number are weight percent and weight
Number.
It should be noted that in the claim and specification of this patent, such as first and second or the like relationship
Term is only used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying
There are any actual relationship or orders between these entities or operation.Moreover, the terms "include", "comprise" or its
Any other variant is intended to non-exclusive inclusion so that including the processes of a series of elements, method, article or
Equipment includes not only those elements, but also includes other elements that are not explicitly listed, or further include for this process,
Method, article or the intrinsic element of equipment.In the absence of more restrictions, being wanted by what sentence " including one " limited
Element, it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.
Embodiment 1
Fig. 1 shows a kind of typical desulfurization wastewater phase transformation flash crystallization Zero discharging system of the present invention, as shown in Figure 1, this is
System includes pipeline 1, water pump 2, First Heat Exchanger 3, salt separator 4, condenser 6, flash vessel 7 and drum 8.Water pump 2, vapour
Packet 8 and flash vessel 7 pass sequentially through the fluid communication of pipeline 1.First Heat Exchanger 3 is set to 8 top of drum and for heating desulfurization
Waste water；Condenser 6 is in fluid communication with flash vessel 7 and for condensing the not saliferous steam after flashing；Salt separator 4 and flash vessel
7 lower flow is connected to and is used to detach crystal salt and water after flash distillation.The system further includes evaporating heat exchanger D, which changes
Hot device is set to the bottom of drum 8 and for heating the water in drum 8.The system further includes the second heat exchanger C, the second heat exchanger
C is set in the flue of boiler tail, and is connect with evaporating heat exchanger D.Second heat exchanger C is phase-change heat-exchanger, passes through absorption
The heat of flue gas in boiler back end ductwork, the heat conduction phase change medium heated in phase-change heat-exchanger store energy.Condenser 6 and power plant
Cooling tower be in fluid communication, the water of the cooling tower from power plant is introduced and is used as condensed water.In connection water pump 2 and flash vessel
Desulfurization wastewater entrance is provided on 7 pipeline, desulfurization wastewater enters pipeline 1 by the desulfurization wastewater entrance.The system further includes
Electric lock pneumatic device 5, electric lock pneumatic device 5 are arranged between flash vessel 7 and salt separator 4, for what 7 bottom of flash vessel was precipitated
Crystal salt is delivered to salt separator 4.
Above-mentioned desulfurization wastewater phase transformation flash crystallization Zero discharging system, can efficiently recycle water resource, and recycle in waste water
Salt, provide the foundation for the recycling of desulfurization wastewater salt, improve system economy.The system realizes desulfurization wastewater
The independent operating of Zero emission device and flue ensure that the safe and stable operation of boiler.Meanwhile the fresh water of recycling can be again
The water consume of power plant has been saved in reuse.
Embodiment 2
A kind of method of the desulfurization wastewater for the treatment of of Power of the present invention carries out desulfurization wastewater using system as shown in Figure 1
Processing.Fresh desulfurization wastewater A from desulfurizing tower is mixed with the cycle saturation waste water B that flash vessel comes out in pipeline 1, through water pump
2 send into the First Heat Exchanger 3 mounted on 8 top of drum, and waste water absorbs drum steam heat, and increasing temperature and pressure subsequently enters sudden strain of a muscle
Steaming device 7 carries out flash separation, crystal salt is precipitated.The not saliferous steam flashed off leaves from 7 top of flash vessel, by condensing
Device 6 is condensed into pure water, recycles.Meanwhile steam maintains negative-pressure vacuum shape after the condensation of condenser 6 in flash vessel 7
State further promotes the flash distillation of waste water.The flash vessel 7 of vacuum state is conducive to the precipitation of salt.The supersaturated waste water of saliferous is dodging
Partially crystallizable salt is precipitated in 7 bottom of steaming device, and the separation of crystal salt and water is realized into salt separator 4 by electric lock pneumatic device 5.
The saturation waste water of crystal salt is not precipitated, from the outflow of 7 bottom of flash vessel and fresh wastewater mixing, enters 8 top of drum through water pump 2
First Heat Exchanger 3 realizes the cycle of waste water side.
Second heat exchanger C is placed in boiler back end ductwork, absorbs the heat of heat smoke, heats leading in the second heat exchanger C
Hot phase change medium stores energy.Then pressurized to be pumped to 8 bottom evaporating heat exchanger D of drum, the water of 8 the inside of heating drum steams
Production high-temperature steam occurs.The high-temperature steam of generation rises to 8 top of drum, and flowing through this by the heating of top First Heat Exchanger 3 changes
Desulfurization wastewater in hot device pipe.The condensation waste water of condenser can be directly from power plant cooling water tower.
Fresh wastewater and recycling waste water are pumped up to drum top heat exchanger and are heated to be thermal wastewater, are dodged subsequently into vacuum
Steaming device is flashed, and realizes being partially separated for brine.Waste water circular flow by water pump is the 15-30 of fresh wastewater flow
Times, big circulating ratio ensures that the wastewater flow rate of flash distillation is realized with fresh wastewater amount and balances.The crystal salt of precipitation is through salt separator
It realizes and collects, undecomposed waste water containing salt loading is continued cycling through, mixed with low temperature fresh wastewater.The steam that flash vessel top comes out
It is condensed and recycles by condenser, boiler feedwater is done for supplementing desulfurizing tower slurrying water or being further processed as fresh water.Waste water
The heat of heating comes from heat exchanger.Vacuum pump is arranged in condenser, is used for the foundation of initial vacuum.It is placed in boiler back end ductwork
Heat exchanger absorb heat smoke heat, phase transformation heat carrier enters the heat exchanger on drum top, and hot steam reheats waste water.Waste water stream
The pipeline of warp is anti-corrosion pipe.Recycling waste water Wen Sheng after electrical heating or steam heating in the moment for flowing out flash vessel
It 5 DEG C or so, prevents saturation waste water salt from analyzing, blocks circulation line.Flushing water is arranged in entire circulation line and condenser pipeline,
The salinity deposited in system is rinsed well using flushing water after operation a period of time, prevent block system and weakens heat exchanger
Exchange capability of heat.Size of heat exchanger is small, there is installation in back-end ductwork using it.
The method of above-mentioned processing desulfurization wastewater, can high efficiente callback water resource and crystal salt, realize the resource of desulfurization wastewater
Change and utilize, saves electric energy, improve economy of power plant.This method efficiently uses boiler back end ductwork flue gas heat, energy-saving
While improve power plant operation stability.
All references mentioned in the present invention is incorporated herein by reference, independent just as each document
It is incorporated as with reference to such.In addition, it should also be understood that, after reading the above teachings of the present invention, those skilled in the art can
To be made various changes or modifications to the present invention, such equivalent forms equally fall within model defined by the application the appended claims
It encloses.
Claims (10)
1. a kind of desulfurization wastewater phase transformation flash crystallization Zero discharging system, which is characterized in that the system comprises water pump, drum, sudden strains of a muscle
Steaming device, condenser, salt separator and First Heat Exchanger；
The water pump, drum and the flash vessel pass sequentially through fluid communication；
The First Heat Exchanger is set at the top of the drum and for heating desulfurization wastewater；
The condenser is in fluid communication with the flash vessel and is used to condense the not saliferous steam after flash distillation；And
The salt separator is connected to the lower flow of the flash vessel and is used to detach crystal salt and water after flash distillation；Its
In,
The waste water that crystal salt is not precipitated is flowed out from the bottom of the flash vessel and is mixed with the untreated effluent in the pipeline, is passed through
The water pump flows into the First Heat Exchanger on the drum top.
2. system according to claim 1, which is characterized in that the system also includes evaporating heat exchanger, the evaporation is changed
Hot device is set to the bottom of the drum and for heating the water in the drum.
3. system according to claim 2, which is characterized in that the system also includes the second heat exchanger, described second changes
Hot device is set in the flue of boiler tail, and is connect with the evaporating heat exchanger.
4. system according to claim 1, which is characterized in that the condenser and the cooling tower of power plant are in fluid communication,
The water of cooling tower from power plant is introduced and is used as condensed water.
5. system according to claim 1, which is characterized in that set on connecting pipeline of the water pump with the flash vessel
It is equipped with desulfurization wastewater entrance, desulfurization wastewater enters pipeline by the desulfurization wastewater entrance.
6. system according to claim 1, which is characterized in that the system also includes electric lock pneumatic device, the electric lock
Gas device is arranged between the flash vessel and the salt separator, the crystal salt conveying for the flasher base to be precipitated
To the salt separator.
7. system according to claim 1, which is characterized in that be equipped with vacuum pump in the condenser.
8. system according to claim 1, which is characterized in that the flash vessel exit is equipped with heating device.
9. system according to claim 1, which is characterized in that the pipeline is anti-corrosion pipeline.
10. a kind of method of the desulfurization wastewater for the treatment of of Power, which is characterized in that the method includes using such as claim 1-9
Any one of them system handles desulfurization wastewater.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710034509.1A CN108314119A (en) | 2017-01-17 | 2017-01-17 | Desulfurization wastewater phase transformation flash crystallization Zero discharging system and method for treating desulfurized wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034509.1A CN108314119A (en) | 2017-01-17 | 2017-01-17 | Desulfurization wastewater phase transformation flash crystallization Zero discharging system and method for treating desulfurized wastewater |
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| CN201710034509.1A Pending CN108314119A (en) | 2017-01-17 | 2017-01-17 | Desulfurization wastewater phase transformation flash crystallization Zero discharging system and method for treating desulfurized wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110182874A (en) * | 2019-05-15 | 2019-08-30 | 宁波大学 | A kind of super low energy consumption flash concentration desulfurization wastewater and industrial brine waste zero emission system |
| CN110627289A (en) * | 2019-10-28 | 2019-12-31 | 中国华电科工集团有限公司 | Low-temperature flue gas heating wastewater concentration system |
| CN114605018A (en) * | 2022-02-04 | 2022-06-10 | 重庆大学 | Method for treating phosphorus-containing fluorine-containing high-salt organic wastewater and recycling salt |
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