CN108947079A - A kind of hot compression zero emission treatment of desulfured waste water and system - Google Patents
A kind of hot compression zero emission treatment of desulfured waste water and system Download PDFInfo
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- 238000005352 clarification Methods 0.000 claims abstract description 66
- 238000012545 processing Methods 0.000 claims abstract description 59
- 238000002425 crystallisation Methods 0.000 claims abstract description 50
- 230000008025 crystallization Effects 0.000 claims abstract description 50
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 43
- 230000023556 desulfurization Effects 0.000 claims abstract description 43
- 208000028659 discharge Diseases 0.000 claims abstract description 34
- 238000012856 packing Methods 0.000 claims abstract description 7
- 238000001223 reverse osmosis Methods 0.000 claims description 92
- 239000012528 membrane Substances 0.000 claims description 71
- 238000000108 ultra-filtration Methods 0.000 claims description 71
- 238000001728 nano-filtration Methods 0.000 claims description 69
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- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 8
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- 238000010438 heat treatment Methods 0.000 claims description 6
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- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention provides a kind of hot compression zero emission treatment of desulfured waste water, four steps are handled including clarification and sofening treatment, concentration, evaporative crystallization and dry packing: can cost-effectively clarify and soften Desulphurization for Coal-fired Power Plant waste water through clarification of water and sofening treatment first in treatment process；Secondly concentrated processing can not only recycle water resource, realize discharged wastewater met the national standard, while using zero discharge treatment, can effectively reduce subsequent zero discharge treatment load；Both vapor compression technique is finally used, the heat-transfer effect of crystallizer is increased and prevents corrosion and fouling, and reduces energy consumption.The present invention also provides the processing system of hot compression desulfurization wastewater zero-emission, rationally, system run all right, waste water treatment efficiency is high for system flow design, effectively reduces processing cost.
Description
Technical field
The present invention relates to a kind of hot compression zero emission treatment of desulfured waste water and systems, belong to desulfurization wastewater processing neck
Domain.
Background technique
The country of great attention with to(for) atmospheric environment protection and water environment protection, the large scale industries such as coal-burning power plant flue gas
What emission standards for sulfur dioxide required becomes further stringent, after smoke-gas wet desulfurization technology is widely applied in coal-fired industry field,
The desulfurization wastewater that its system generates has become the problem of wastewater treatment since salt content is higher.It is right recently as country
The attention of correlative technology field is obtained in the zero-discharge technology of being gradually increased for industry water emission request, desulfurization wastewater, especially
It is to apply more to be paid close attention in the reliability of Desulphurization for Coal-fired Power Plant waste water zero-discharge technology.
Because coal-burning power plant's water consumption is big, and has a large amount of waste heat for utilizing, and is the main application of waste water zero emission
Field.Wet desulphurization waste water in coal-burning power plant's differs greatly with waste water caused by the other systems of power plant, is coal-burning power plant's water system
Interior water quality is most complicated, pollutes the water body of most serious.Desulfurization wastewater contains suspended matter, high chlorine root, high salinity and the height of high concentration
Concentration heavy metal, environmental pollution is extremely strong, therefore desulfurization wastewater zero-emission is imperative.
The difficulty in treatment of desulfurization wastewater is that its variation water quality is big, complicated component, hardness are high, and traditional treatment process master
Will be based on common chemical treatment, including processes such as neutralization, flocculating setting, mud-water separation are commonly called as three headers, and it is useless that treated
Its salt content not anti-reflection of water increases, if directly outlet can not only endanger environment but also also create the wasting of resources, in order to more efficient
Treatment of Power desulfurization wastewater and to greatest extent utilize resource, developing the new cycling and reutilization technique for desulfurization wastewater is
It is highly desirable.
Summary of the invention
The object of the present invention is to provide hot compression zero emission treatment of desulfured waste water and system, treatment process letters
List, effect are good, realize the zero-emission of desulfurization wastewater.
In order to solve the above technical problems, the present invention adopts the following technical scheme that:
A kind of hot compression zero emission treatment of desulfured waste water, comprising the following steps:
(1) clarification and sofening treatment: introducing efficient clarification system for desulfurization wastewater and acid-alkali regeneration waste water, described efficiently clear
Clear system includes mixing pit, flocculation basin and concentrating clarifying pond, adds flocculant, NaOH and Na respectively in mixing pit2CO3It eliminates
Calcium and magnesium ion continuously adds flocculation aid in flocculation basin, is separated by solid-liquid separation subsequently into concentrating clarifying pond, removes ammonia nitrogen simultaneously
PH value is adjusted, water outlet enters softening pond, the sludge outward transport of generation, and the water outlet for softening pond repeats aforementioned treatment Step 1 time；
(2) concentration: softened water enters ultrafiltration apparatus after cooling and is handled, and ultrafiltration apparatus water outlet enters nanofiltration and fills
It sets and is handled, handled subsequently into reverse osmosis unit, the fresh water collecting after reverse osmosis unit is concentrated to fresh-water tank, by
Water is pumped to reuse in boiler of power plant make up water treatment system ultrafiltration water tank, and strong brine is collected to strong brine case, ultrafiltration apparatus and
The draining of nanofiltration device is recycled to step (1) and is handled；
(3) evaporative crystallization: strong brine enters evaporated crystallization device, and temperature rises to boiling point after exchanging heat, subsequently into degassing
Tower；In degassing tower, strong brine on filler, and flows downward be in contact with upstream steam step by step through nozzles spray,
On-condensible gas is removed, the gas of removing drains into atmosphere together with steam；Strong brine after degassed is sent from degassing tower discharge to knot
Brilliant device, heated and flash distillation, water is separated as a vapor, becomes hypersaturated state, and the crystal of salt is from solution therewith
Middle precipitation forms dense salt slurry；
(4) dry packing is handled: dense salt slurry drains into centrifugal drying system and carries out solid-liquor separation, and solid is packed after drying,
Centrifugate is collected the return crystallizer in tank and is handled again.
Preferably, described to pass through at two secondary clearings and softening in hot compression zero emission treatment of desulfured waste water above-mentioned
The total hardness with calcium carbonate of softened water after reason is controlled in 20mg/L hereinafter, avoiding subsequent high pressure reverse osmosis unit and evaporation
The scale problems of crystallization apparatus.
Preferably, in hot compression zero emission treatment of desulfured waste water above-mentioned, ultrafiltration apparatus is super in the step (2)
Filter membrane uses ceramic membrane, and material is α-aluminium oxide, and pore size filter is not more than 50nm, and operating flux is not higher than 150L/m2·h；It receives
Filter device in nanofiltration membrane use scroll-type antipollution low pressure (7.6-30bar) organic hybrid films, two sections of level-one, average flux value
For 15~20LMH；Reverse osmosis unit is high pressure (40-82bar) rolling (STRO), and wherein reverse osmosis membrane is anti-using network pipe type high pressure
Permeable membrane, operating pressure 90-120bar, average flux value are 10-15LMH.It is compared to other ceramic membranes, α-oxidation
Aluminium ceramic membrane has the advantages that 1, membrane lifetime is longer；2, membrane flux is higher than other materials film；3, without fracture of wire；4, for outstanding
The degrees of tolerance of floating object is higher；5, the rate of recovery is higher (92-99%)；6, chemical stability it is higher (oxidation resistance is strong, tolerance more
Wide PH range is resistant to cation type polymer, is resistant to grease)；7, operating pressure range is wide (1-10bar)；So that α-aluminium oxide
Ceramic membrane is especially suitable for the processing to desulfurization wastewater.
Preferably, in hot compression zero emission treatment of desulfured waste water above-mentioned, the step (3) is using steam heat
Driven compressor forced circulation crystal system.Steam hot compression technique (Thermal Vapour Recompressor, TVR) is
According to heat pump principle, pressurizeed, heated the skill of recycling using the steam of high voltage power work self-heating in initial steam future room
Art.During thermodynamic steam recompression, a part for the secondary steam that last effect is separated is in high voltage power steam
Drive under enter both vapor compression injector after mixing increasing temperature and pressure enter first effect as heating steam use.Another part
Steam enters condenser as superfluous residue vapor, is discharged after condensation, and the energy and supplement for the superfluous residue vapor being discharged are dynamic
Power steam energy is suitable, i.e., the energy of power steam must be as Decay heat removal to secondary steam.According to its performance characteristics, use
The energy that one thermodynamic steam compression injection device is saved is suitable with the energy that 1st effective evaporator is saved is increased, and handles in guarantee
Energy consumption is greatly reduced while effect.
The processing system for implementing hot compression zero emission treatment of desulfured waste water above-mentioned, including the connected waste water of sequence
Pond, high efficiency clarification tank A, softening pond A, high efficiency clarification tank B, softening pond B, concentrating and treating system, evaporative crystallization processing system,
Centrifugal drying system and automatic packaging system；Wherein high efficiency clarification tank A and B is identical, includes the connected mixing pit of sequence, flocculation
Pond and concentrating clarifying pond；It is identical with softening pond B to soften pond A；Concentrating and treating system include the connected plate heat exchanger of sequence,
Ultrafiltration apparatus, nanofiltration device and reverse osmosis unit, the fresh-water tank and boiler of power plant make up water treatment system of the reverse osmosis unit
Ultrafiltration water tank is connected, the strong brine case of reverse osmosis unit is connected with evaporative crystallization processing system；The row of evaporative crystallization processing system
Liquid mouth is connected with the feed inlet of centrifugal drying system；The mother liquor tank of centrifugal drying system and the inlet of evaporative crystallization processing system
It is connected.
Further, in hot compression desulfurization wastewater zero-discharge treatment system above-mentioned, the wastewater disposal basin dischargeable capacity must not
Processing water less than 48h；It is respectively equipped with mud scraper on the high efficiency clarification tank A and B, and wadding is set on mixing pit therein
Solidifying agent medicine system, NaOH medicine system and Na2CO3Medicine system, is arranged flocculation aid medicine system on flocculation basin, mixing pit and
It is additionally provided with blender inside flocculation basin, hydrochloric acid dosing pump, sodium hypochlorite dosing pump and sodium hydroxide are set on concentrating clarifying pond
Mechanical agitating clarifier is arranged in concentrating clarifying pond in dosing pump, and mud discharging mouth A and mud discharging mouth B is respectively set in concentrating clarifying bottom of pond portion
And it is connected by sludge pump with plate and frame filter press；The softening pond and be underground type armored concrete system, dischargeable capacity be height
Imitate 1~2h amount of clarifying basin A and B.When it is implemented, should have the measure for extending hydraulic detention time, waterpower in high efficiency clarification tank
Residence time is about 2 hours, and liquidometer, mud level meter and PH meter is arranged, and interior anti-corrosion is using lining glass flake.
Further, in hot compression desulfurization wastewater zero-discharge treatment system above-mentioned, the ultrafiltration of the concentrating and treating system
Device includes connected plate heat exchanger, self-cleaning filter, ultrafiltration apparatus and the ultrafiltration water tank of sequence, is wherein surpassed in ultrafiltration apparatus
Filter membrane uses ceramic membrane, and the material of ceramic membrane is α-aluminium oxide, and pore size filter is not more than 50nm, the fortune of Ceramic excessive filtration membrane component
Row flux is not higher than 150L/m2·h；The nanofiltration device of the concentrating and treating system includes the connected nanofiltration water pump of sequence, nanofiltration
Cartridge filter, nanofiltration equipment and nanofiltration water producing tank, wherein nanofiltration membrane uses scroll-type antipollution low pressure (7.6- in nanofiltration equipment
30bar) organic hybrid films, two sections of level-one, the average flux value of nanofiltration membrane is 15-20LMH；The concentrating and treating system it is anti-
Permeability apparatus is high pressure (40-82bar) rolling, including the connected reverse osmosis delivery pump of sequence, reverse osmosis cartridge filter, reverse osmosis
Saturating booster and reverse osmosis equipment, wherein the reverse osmosis membrane in reverse osmosis equipment uses network pipe type high pressure reverse osmosis membrane, operation pressure
Power is 90-120bar, and average flux value is 10-15LMH.When it is implemented, pipe heat exchanger should be according to influent quality and water
Temperature selects suitable heat exchange area and equipment material, and softened water flow passage components material is S22053 stainless steel；Self-cleaning filter
It using stacked filter plant, can be backwashed according to pressure difference or timing controlled, cleaning way is endogenous water backwash；Nanofiltration is protected
The structure of peace filter and reverse osmosis cartridge filter should meet the requirement of quick-replaceable filtering element, ontology material carbon steel, liner
S25073 stainless steel, filtering element use melt-blown filter；Reverse osmosis booster should with supply suitable energy recycle device, pump case, impeller,
The material of the flow passage components such as energy recycle device is all made of S25073 stainless steel, and the sealing of pump should be able to be anti-corrosion, and sealing means are resistance to
Corrode double mechanical seal；Ultrafiltration water tank and nanofiltration water tank material are steel glass inner-lining scale, and fresh-water tank material is steel
Interior spray polyurea, strong brine box lumber matter are steel glass inner-lining scale.
Further, in hot compression desulfurization wastewater zero-discharge treatment system above-mentioned, the evaporative crystallization processing system is adopted
It is steam thermocompressor (TVR) driving forced circulation crystal system.Steam thermocompressor (TVR) drives forced circulation crystallization
The flash tank of system crystallizer connects a shell-and-tube heater by circulation pipe.Circulating pump send strong brine to adding from flash tank
Hot device carries out heat exchange, and the heater of crystallizer is horizontal two tube sides heat exchanger.Crystallizer water inlet and the dense salt recycled in system
Slurry mixing has 2~6 degree of temperature rises (sensible heat), is re-introduced into flash tank, flashes after being added heater to heat, and salt is precipitated
Crystallization.Enter from the dense salt slurry that heat exchanger comes out from tangent line in the middle part of flash tank, vortex is generated in tank.The generation of vortex facilitates
Form bigger liquid flashes surface.Steam is by demister except the drop contained and particle in devaporation, the water of generation
Steam is extracted rear portion and is sent directly into thermocompressor to be compressed by the factory steam from buyer systems, the mixing of discharge
Steam reaches enough saturation temperatures and pressure is sent to heater shell side, by latent heat treatment to the dense salt slurry of circulation.Compressed steam
While discharging latent heat, distilled water is condensed into heat exchange pipe outer wall and enters to distill water pot.And by pumping through distillation water- to-water heat exchanger to new
Into high slat-containing wastewater heating after outlet reuse.The vapor that machine utilizes that is not thermally compressed generated in crystallizer is directly conveyed
Enter the surface condenser water condensation that is cooled and gets off to be formed distilled water transmitting system to be further processed or reuse.Salt crystal is being tied
It is constantly formed in brilliant device flash tank.During heating and flash distillation, water is separated as a vapor, and dense salt slurry becomes
Hypersaturated state, the crystal of salt is precipitated from solution therewith.The dense salt slurry in part is immediately discharged to centrifugal drying system from circulating line
System carries out solid-liquor separation.Centrifuge mother liquor collection returns to crystallizer in mother liquor tank.Organic concentration mistake in crystallizer in order to prevent
Height is limited in an acceptable range, sub-fraction centrifuge mother liquor may in the form of blowdown discharge system.This
The TVR steam autoclave that system uses, working media are that the high temperature and high pressure steam that power plant comes reaches this hot pressing after adjusting pressure
Machine needs operating pressure, and compressed media is the secondary steam generated in evaporator, and secondary steam enters evaporator after compression
Heater shell side, and undergo phase transition, be changed into condensed water after discharging heat.
Further, in hot compression desulfurization wastewater zero-discharge treatment system above-mentioned, the centrifugal drying system includes
Cyclone hydraulic separators, centrifugal dehydrator and the drier of sequential connection wherein install the air inducing for having bag filter on drier
Machine.When work, aqueous 5% or so wet sodium chloride crystal enters drying system, and moisture content is reduced to 0.8% or hereinafter, is obtained
The sodium chloride crystal salt for being 97.5% or so to product purity, then final products are obtained after being packaged by pack.
Further, in hot compression desulfurization wastewater zero-discharge treatment system above-mentioned, the automatic packaging system includes
The connected feed bin of sequence, automatic gauge claim, automatic packaging machine, sack closer, net belt type conveyer and automatic stacking machine；It is wherein automatic
The feed bin of packaging system is connected with the drier of centrifugal drying system.
It in order to illustrate technical solution of the present invention, prevents from obscuring, to the title of treated water in the application, be explained as follows:
1) desulfurization wastewater --- the 1. desulfurization wastewater of FGD (flue gas desulphurization system) discharge；
Acid-alkali regeneration waste water --- 2. condensed water precision processing system mixed bed and Boiler water Feeding System system ion-exchanger
The waste water of acid-alkali regeneration discharge.
2) softened water --- NaOH, Na are added in light salt brine2CO3Demineralized water, and intake as concentration systems.
3) strong brine --- be concentrated softened water using ultrafiltration apparatus, nanofiltration device and reverse osmosis unit, strong brine directly into
Enter the dry salt manufacturing of Multi-effect evaporation crystallizer, the fresh water reuse of generation.
4) condensed water --- strong brine is through evaporating the fresh water generated when evaporated crystallization device.
5) saturated solution containing crystal salt that salt slurry --- strong brine is generated through evaporated crystallization device.
6) crystallizing and drying --- the crystal salt that moisture content is less than set quota is heated and is precipitated to salt slurry using steam.
7) pack --- crystal salt is packed, sealed and is neatly placed.
The beneficial effects of the present invention are: hot compression zero emission treatment of desulfured waste water provided by the invention and system, first
First hardness is effectively reduced and removes the impurity such as removing heavy metals through useless water softening treatment plant；Secondly concentrated processing can be provided with recycle-water
Source efficiently separates divalent salts and monovalent salt, reduces subsequent zero discharge treatment load；Hot compression steam cycle is finally used, is improved
The utilization rate of steam increases the heat-transfer effect of crystallizer and prevents corrosion and fouling, and reduces energy consumption.Place of the present invention
Rationally, system run all right, waste water treatment efficiency is high, effectively reduces processing cost for science and engineering skill and system flow design.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of hot compression desulfurization wastewater zero-discharge treatment system of the present invention.
Appended drawing reference: 1- wastewater disposal basin, 2- high efficiency clarification tank A, 3- soften pond A, and 4- high efficiency clarification tank B, 5- soften pond
B, 6- concentrating and treating system, 7- evaporative crystallization processing system, 8- centrifugal drying system, 9- automatic packaging system, 10- plate-type heat-exchange
Device, 11- ultrafiltration apparatus, 12- nanofiltration device, 13- reverse osmosis unit, 14- fresh-water tank, 15- strong brine case, 16- mud discharging mouth A, 17-
Mud discharging mouth B, 18- sludge pump, 19- plate and frame filter press, 20- cyclone hydraulic separators, 21- centrifugal dehydrator, 22- drier.
Specific embodiment
Embodiment 1
A kind of hot compression zero emission treatment of desulfured waste water, comprising the following steps:
(1) clarification and sofening treatment: introducing efficient clarification system for desulfurization wastewater and acid-alkali regeneration waste water, described efficiently clear
Clear system includes mixing pit, flocculation basin and concentrating clarifying pond, adds flocculant, NaOH and Na respectively in mixing pit2CO3It eliminates
Calcium and magnesium ion continuously adds flocculation aid in flocculation basin, is separated by solid-liquid separation subsequently into concentrating clarifying pond, removes ammonia nitrogen simultaneously
PH value is adjusted, water outlet enters softening pond, the sludge outward transport of generation, and the water outlet for softening pond repeats aforementioned treatment Step 1 time；
(2) concentration: softened water enters ultrafiltration apparatus after cooling and is handled, and ultrafiltration apparatus water outlet enters nanofiltration and fills
It sets and is handled, handled subsequently into reverse osmosis unit, the fresh water collecting after reverse osmosis unit is concentrated to fresh-water tank, by
Water is pumped to reuse in boiler of power plant make up water treatment system ultrafiltration water tank, and strong brine is collected to strong brine case, ultrafiltration apparatus and
The draining of nanofiltration device is recycled to step (1) and is handled；
(3) evaporative crystallization:
Strong brine enters evaporated crystallization device, and temperature rises to boiling point after exchanging heat, subsequently into degassing tower；In degassing tower
Interior, strong brine on filler, and flows downward be in contact with upstream steam step by step through nozzles spray, removes fixed gas
The gas of body, removing drains into atmosphere together with steam；Strong brine after degassed is sent from degassing tower discharge to crystallizer, heated
And flash distillation, water are separated as a vapor, become hypersaturated state, therewith the crystal of salt be precipitated from solution formed it is dense
Salt slurry；
(4) dry packing is handled: dense salt slurry drains into centrifugal drying system and carries out solid-liquor separation, and solid is packed after drying,
Centrifugate is collected the return crystallizer in tank and is handled again.
Embodiment 2
A kind of hot compression zero emission treatment of desulfured waste water, comprising the following steps:
(1) clarification and sofening treatment: introducing efficient clarification system for desulfurization wastewater and acid-alkali regeneration waste water, described efficiently clear
Clear system includes mixing pit, flocculation basin and concentrating clarifying pond, adds flocculant, NaOH and Na respectively in mixing pit2CO3It eliminates
Calcium and magnesium ion continuously adds flocculation aid in flocculation basin, is separated by solid-liquid separation subsequently into concentrating clarifying pond, removes ammonia nitrogen simultaneously
PH value is adjusted, water outlet enters softening pond, the sludge outward transport of generation, and the water outlet for softening pond repeats aforementioned treatment Step 1 time；
The total hardness with calcium carbonate of the softened water after two secondary clearings and sofening treatment is controlled in 20mg/L or less；
(2) concentration: softened water enters Ceramic excessive filtration device and is handled, and enters after the water outlet of Ceramic excessive filtration device is cooling
Nanofiltration device is handled, and is handled subsequently into reverse osmosis unit, and the fresh water collecting after reverse osmosis unit is concentrated is to light
Water tank is pumped to reuse in boiler of power plant make up water treatment system ultrafiltration water tank by water, and strong brine is collected to strong brine case；Wherein
The ultrafiltration membrane of ultrafiltration apparatus uses ceramic membrane, and material is α-aluminium oxide, pore size filter 30nm, operating flux 150L/m2·h；
Nanofiltration membrane uses scroll-type antipollution low pressure organic hybrid films in nanofiltration device, and two sections of level-one, average flux value is 15LMH；
Reverse osmosis membrane uses network pipe type high pressure reverse osmosis membrane, operating pressure 90bar in reverse osmosis unit, and average flux value is
10LMH。
(3) evaporative crystallization: strong brine enters steam heat driven compressor forced circulation crystal system, the temperature liter after exchanging heat
Extremely close to boiling point, subsequently into degassing tower；In degassing tower, strong brine flows downward on filler, and step by step through nozzles spray
It is in contact with upstream steam, removes on-condensible gas, the gas of removing drains into atmosphere together with steam；It is dense after degassed
Salt water is sent from degassing tower discharge to crystallizer, and heated and flash distillation, water are separated as a vapor, becomes supersaturated shape
State, the crystal of salt is precipitated from solution and forms dense salt slurry therewith；
(4) dry packing is handled: dense salt slurry drains into centrifugal drying system and carries out solid-liquor separation, and solid is packed after drying,
Centrifugate is collected the return crystallizer in tank and is handled again.
Embodiment 3
A kind of hot compression zero emission treatment of desulfured waste water, comprising the following steps:
(1) clarification and sofening treatment: introducing efficient clarification system for desulfurization wastewater and acid-alkali regeneration waste water, described efficiently clear
Clear system includes mixing pit, flocculation basin and concentrating clarifying pond, adds flocculant, NaOH and Na respectively in mixing pit2CO3It eliminates
Calcium and magnesium ion continuously adds flocculation aid in flocculation basin, is separated by solid-liquid separation subsequently into concentrating clarifying pond, removes ammonia nitrogen simultaneously
PH value is adjusted, water outlet enters softening pond, the sludge outward transport of generation, and the water outlet for softening pond repeats aforementioned treatment Step 1 time；
The total hardness with calcium carbonate of the softened water after two secondary clearings and sofening treatment is controlled in 10mg/L or less；
(2) concentration: softened water enters Ceramic excessive filtration device and is handled, and enters after the water outlet of Ceramic excessive filtration device is cooling
Nanofiltration device is handled, and is handled subsequently into reverse osmosis unit, and the fresh water collecting after reverse osmosis unit is concentrated is to light
Water tank is pumped to reuse in boiler of power plant make up water treatment system ultrafiltration water tank by water, and strong brine is collected to strong brine case；Wherein
The ultrafiltration membrane of ultrafiltration apparatus uses ceramic membrane, and material is α-aluminium oxide, pore size filter 50nm, operating flux 120L/m2·h；
Nanofiltration membrane uses scroll-type antipollution low pressure organic hybrid films in nanofiltration device, and two sections of level-one, average flux value is 20LMH；
Reverse osmosis membrane uses network pipe type high pressure reverse osmosis membrane, operating pressure 120bar in reverse osmosis unit, and average flux value is
15LMH。
(3) evaporative crystallization: strong brine enters steam heat driven compressor forced circulation crystal system, the temperature liter after exchanging heat
Extremely close to boiling point, subsequently into degassing tower；In degassing tower, strong brine flows downward on filler, and step by step through nozzles spray
It is in contact with upstream steam, removes on-condensible gas, the gas of removing drains into atmosphere together with steam；It is dense after degassed
Salt water is sent from degassing tower discharge to crystallizer, and heated and flash distillation, water are separated as a vapor, becomes supersaturated shape
State, the crystal of salt is precipitated from solution and forms dense salt slurry therewith；Steam heat driven compressor forced circulation crystal system can be used；
(4) dry packing is handled: dense salt slurry drains into centrifugal drying system and carries out solid-liquor separation, and solid is packed after drying,
Centrifugate is collected the return crystallizer in tank and is handled again.
Embodiment 4
A kind of hot compression zero emission treatment of desulfured waste water, comprising the following steps:
(1) clarification and sofening treatment: introducing efficient clarification system for desulfurization wastewater and acid-alkali regeneration waste water, described efficiently clear
Clear system includes mixing pit, flocculation basin and concentrating clarifying pond, adds flocculant, NaOH and Na respectively in mixing pit2CO3It eliminates
Calcium and magnesium ion continuously adds flocculation aid in flocculation basin, is separated by solid-liquid separation subsequently into concentrating clarifying pond, removes ammonia nitrogen simultaneously
PH value is adjusted, water outlet enters softening pond, the sludge outward transport of generation, and the water outlet for softening pond repeats aforementioned treatment Step 1 time；
The total hardness with calcium carbonate of the softened water after two secondary clearings and sofening treatment is controlled in 15mg/L or less；
(2) concentration: softened water enters Ceramic excessive filtration device and is handled, and enters after the water outlet of Ceramic excessive filtration device is cooling
Nanofiltration device is handled, and is handled subsequently into reverse osmosis unit, and the fresh water collecting after reverse osmosis unit is concentrated is to light
Water tank is pumped to reuse in boiler of power plant make up water treatment system ultrafiltration water tank by water, and strong brine is collected to strong brine case；Wherein
The ultrafiltration membrane of ultrafiltration apparatus uses ceramic membrane, and material is α-aluminium oxide, pore size filter 40nm, operating flux 100L/m2·h；
Nanofiltration membrane uses scroll-type antipollution low pressure organic hybrid films in nanofiltration device, and two sections of level-one, average flux value is 18LMH；
Reverse osmosis membrane uses network pipe type high pressure reverse osmosis membrane, operating pressure 105bar in reverse osmosis unit, and average flux value is
12LMH。
(3) evaporative crystallization: strong brine enters steam heat driven compressor forced circulation crystal system, the temperature liter after exchanging heat
Extremely close to boiling point, subsequently into degassing tower；In degassing tower, strong brine flows downward on filler, and step by step through nozzles spray
It is in contact with upstream steam, removes on-condensible gas, the gas of removing drains into atmosphere together with steam；It is dense after degassed
Salt water is sent from degassing tower discharge to crystallizer, and heated and flash distillation, water are separated as a vapor, becomes supersaturated shape
State, the crystal of salt is precipitated from solution and forms dense salt slurry therewith；Steam heat driven compressor forced circulation crystal system can be used；
(4) dry packing is handled: dense salt slurry drains into centrifugal drying system and carries out solid-liquor separation, and solid is packed after drying,
Centrifugate is collected the return crystallizer in tank and is handled again.
Embodiment 5
A kind of hot compression desulfurization wastewater zero-discharge treatment system, including the connected wastewater disposal basin 1 of sequence, high efficiency clarification tank A2,
Soften pond A3, high efficiency clarification tank B4, softens pond B5, concentrating and treating system 6, evaporative crystallization processing system 7, centrifugal drying system
System 8 and automatic packaging system 9；Wherein efficient clarification system A2 is identical with efficient clarification system B4, and including that sequence is connected mixes
Close pond, flocculation basin and concentrating clarifying pond；It is identical with softening pond B5 to soften pond A3；Concentrating and treating system 6 includes that sequence is connected
Pipe heat exchanger 10, ultrafiltration apparatus 11, nanofiltration device 12 and reverse osmosis unit 13, the fresh-water tank 14 of the reverse osmosis unit 13
It is connected with boiler of power plant make up water treatment system ultrafiltration water tank, the strong brine case 15 of reverse osmosis unit 13 and evaporative crystallization processing system
System 7 is connected；The leakage fluid dram of evaporative crystallization processing system 7 is connected with the feed inlet of centrifugal drying system 8；Centrifugal drying system 8
Mother liquor tank is connected with the inlet of evaporative crystallization processing system 7.
Embodiment 6
A kind of hot compression desulfurization wastewater zero-discharge treatment system, including the connected wastewater disposal basin 1 of sequence, high efficiency clarification tank A2,
Soften pond A3, high efficiency clarification tank B4, softens pond B5, concentrating and treating system 6, evaporative crystallization processing system 7, centrifugal drying system
System 8 and automatic packaging system 9；Wherein efficient clarification system A2 is identical with efficient clarification system B4, and including that sequence is connected mixes
Close pond, flocculation basin and concentrating clarifying pond；It is identical with softening pond B5 to soften pond A3；Concentrating and treating system 6 includes that sequence is connected
Pipe heat exchanger 10, ultrafiltration apparatus 11, nanofiltration device 12 and reverse osmosis unit 13, the fresh-water tank 14 of the reverse osmosis unit 13
It is connected with boiler of power plant make up water treatment system ultrafiltration water tank, the strong brine case 15 of reverse osmosis unit 13 and evaporative crystallization processing system
System 7 is connected；The leakage fluid dram of evaporative crystallization processing system 7 is connected with the feed inlet of centrifugal drying system 8；Centrifugal drying system 8
Mother liquor tank is connected with the inlet of evaporative crystallization processing system 7.
1 dischargeable capacity of wastewater disposal basin is the processing water of 48h；It is respectively equipped with and scrapes on the efficient clarification system A2 and B4
Mud machine, and flocculant medicine system, NaOH medicine system and Na are set on mixing pit therein2CO3Medicine system, flocculation basin
Upper setting flocculation aid medicine system is additionally provided with blender inside mixing pit and flocculation basin, and setting hydrochloric acid adds on concentrating clarifying pond
Mechanical agitating clarifier, concentrating clarifying pond is arranged in concentrating clarifying pond in Teat pipette, sodium hypochlorite dosing pump and sodium hydroxide dosing pump
Bottom is respectively set mud discharging mouth A16 and B17 and is connected by sludge pump 18 with plate and frame filter press 19；Softening the pond A3 and B5
For underground type armored concrete system, dischargeable capacity is the 1h amount of high efficiency clarification tank A2 and B4 water outlet.
Embodiment 7
A kind of hot compression desulfurization wastewater zero-discharge treatment system, including the connected wastewater disposal basin 1 of sequence, high efficiency clarification tank A2,
Soften pond A3, high efficiency clarification tank B4, softens pond B5, concentrating and treating system 6, evaporative crystallization processing system 7, centrifugal drying system
System 8 and automatic packaging system 9；Wherein efficient clarification system A2 is identical with efficient clarification system B4, and including that sequence is connected mixes
Close pond, flocculation basin and concentrating clarifying pond；It is identical with softening pond B5 to soften pond A3；Concentrating and treating system 6 includes that sequence is connected
Pipe heat exchanger 10, ultrafiltration apparatus 11, nanofiltration device 12 and reverse osmosis unit 13, the fresh-water tank 14 of the reverse osmosis unit 13
It is connected with boiler of power plant make up water treatment system ultrafiltration water tank, the strong brine case 15 of reverse osmosis unit 13 and evaporative crystallization processing system
System 7 is connected；The leakage fluid dram of evaporative crystallization processing system 7 is connected with the feed inlet of centrifugal drying system 8；Centrifugal drying system 8
Mother liquor tank is connected with the inlet of evaporative crystallization processing system 7.
1 dischargeable capacity of wastewater disposal basin is the processing water of 60h；It is respectively equipped with and scrapes on the efficient clarification system A2 and B4
Mud machine, and flocculant medicine system, NaOH medicine system and Na are set on mixing pit therein2CO3Medicine system, flocculation basin
Upper setting flocculation aid medicine system is additionally provided with blender inside mixing pit and flocculation basin, and setting hydrochloric acid adds on concentrating clarifying pond
Mechanical agitating clarifier, concentrating clarifying pond is arranged in concentrating clarifying pond in Teat pipette, sodium hypochlorite dosing pump and sodium hydroxide dosing pump
Bottom is respectively set mud discharging mouth A16 and B17 and is connected by sludge pump 18 with plate and frame filter press 19；Softening the pond A3 and B5
For underground type armored concrete system, dischargeable capacity is the 2h amount of high efficiency clarification tank A2 and B4 water outlet.
The ultrafiltration apparatus of the concentrating and treating system 6 includes the connected plate heat exchanger of sequence, self-cleaning filter, ultrafiltration
Equipment and ultrafiltration water tank, wherein ultrafiltration membrane uses ceramic membrane in ultrafiltration apparatus, and material is α-aluminium oxide, pore size filter 30nm, pottery
The operating flux 150L/m of porcelain ultrafiltration membrane elements2·h；The nanofiltration device of the concentrating and treating system 6, which includes that sequence is connected, to be received
Water-filtering pump, nanofiltration cartridge filter, nanofiltration equipment and nanofiltration water producing tank, wherein nanofiltration membrane uses scroll-type anti-pollution in nanofiltration equipment
Low pressure organic hybrid films are contaminated, two sections of level-one, the average flux value of nanofiltration membrane is 20LMH；The reverse osmosis of the concentrating and treating system 6
Saturating device is high pressure rolling, including the connected reverse osmosis delivery pump of sequence, reverse osmosis cartridge filter, reverse osmosis booster and anti-
Penetration equipment, wherein the reverse osmosis membrane in reverse osmosis equipment use network pipe type high pressure reverse osmosis membrane and operating pressure for
120bar, average flux value are 15LMH.
Embodiment 8
A kind of hot compression desulfurization wastewater zero-discharge treatment system, including the connected wastewater disposal basin 1 of sequence, high efficiency clarification tank A2,
Soften pond A3, high efficiency clarification tank B4, softens pond B5, concentrating and treating system 6, evaporative crystallization processing system 7, centrifugal drying system
System 8 and automatic packaging system 9；Wherein efficient clarification system A2 is identical with efficient clarification system B4, and including that sequence is connected mixes
Close pond, flocculation basin and concentrating clarifying pond；It is identical with softening pond B5 to soften pond A3；Concentrating and treating system 6 includes that sequence is connected
Pipe heat exchanger 10, ultrafiltration apparatus 11, nanofiltration device 12 and reverse osmosis unit 13, the fresh-water tank 14 of the reverse osmosis unit 13
It is connected with boiler of power plant make up water treatment system ultrafiltration water tank, the strong brine case 15 of reverse osmosis unit 13 and evaporative crystallization processing system
System 7 is connected；The leakage fluid dram of evaporative crystallization processing system 7 is connected with the feed inlet of centrifugal drying system 8；Centrifugal drying system 8
Mother liquor tank is connected with the inlet of evaporative crystallization processing system 7.
1 dischargeable capacity of wastewater disposal basin is the processing water of 72h；It is respectively equipped with and scrapes on the efficient clarification system A2 and B4
Mud machine, and flocculant medicine system, NaOH medicine system and Na are set on mixing pit therein2CO3Medicine system, flocculation basin
Upper setting flocculation aid medicine system is additionally provided with blender inside mixing pit and flocculation basin, and setting hydrochloric acid adds on concentrating clarifying pond
Mechanical agitating clarifier, concentrating clarifying pond is arranged in concentrating clarifying pond in Teat pipette, sodium hypochlorite dosing pump and sodium hydroxide dosing pump
Bottom is respectively set mud discharging mouth A16 and B17 and is connected by sludge pump 18 with plate and frame type filter-press 19；The softening pond A3 and
B5 is underground type armored concrete system, and dischargeable capacity is the 2h amount of high efficiency clarification tank A2 and B4 water outlet.
The ultrafiltration apparatus of the concentrating and treating system 6 includes connected self-cleaning filter, ultrafiltration apparatus and the ultrafiltration of sequence
Water tank, wherein ultrafiltration membrane uses ceramic membrane in ultrafiltration apparatus, and the material of ceramic membrane is α-aluminium oxide, pore size filter 40nm, ceramics
The operating flux 120L/m of ultrafiltration membrane elements2·h；The nanofiltration device of the concentrating and treating system 6 includes the connected nanofiltration of sequence
Water pump, nanofiltration cartridge filter, nanofiltration equipment and nanofiltration water producing tank, wherein nanofiltration membrane uses scroll-type antipollution in nanofiltration equipment
Low pressure organic hybrid films, two sections of level-one, the average flux value of nanofiltration membrane is 15LMH；The concentrating and treating system 6 it is reverse osmosis
Device is high pressure rolling, including sequence connected reverse osmosis delivery pump, reverse osmosis cartridge filter, reverse osmosis booster and reverse osmosis
Saturating equipment, wherein the reverse osmosis membrane in reverse osmosis equipment uses network pipe type high pressure reverse osmosis membrane and operating pressure for 90bar, puts down
Equal membrane flux value is 10LMH.
The evaporative crystallization processing system 7 is using steam heat driven compressor forced circulation crystal system.
Embodiment 9
A kind of hot compression desulfurization wastewater zero-discharge treatment system, including the connected wastewater disposal basin 1 of sequence, high efficiency clarification tank A2,
Soften pond A3, high efficiency clarification tank B4, softens pond B5, concentrating and treating system 6, evaporative crystallization processing system 7, centrifugal drying system
System 8 and automatic packaging system 9；Wherein efficient clarification system A2 is identical with efficient clarification system B4, and including that sequence is connected mixes
Close pond, flocculation basin and concentrating clarifying pond；It is identical with softening pond B5 to soften pond A3；Concentrating and treating system 6 includes that sequence is connected
Pipe heat exchanger 10, ultrafiltration apparatus 11, nanofiltration device 12 and reverse osmosis unit 13, the fresh-water tank 14 of the reverse osmosis unit 13
It is connected with boiler of power plant make up water treatment system ultrafiltration water tank, the strong brine case 15 of reverse osmosis unit 13 and evaporative crystallization processing system
System 7 is connected；The leakage fluid dram of evaporative crystallization processing system 7 is connected with the feed inlet of centrifugal drying system 8；Centrifugal drying system 8
Mother liquor tank is connected with the inlet of evaporative crystallization processing system 7.
1 dischargeable capacity of wastewater disposal basin is the processing water of 48h；It is respectively equipped with and scrapes on the efficient clarification system A2 and B4
Mud machine, and flocculant medicine system, NaOH medicine system and Na are set on mixing pit therein2CO3Medicine system, flocculation basin
Upper setting flocculation aid medicine system is additionally provided with blender inside mixing pit and flocculation basin, and setting hydrochloric acid adds on concentrating clarifying pond
Mechanical agitating clarifier, concentrating clarifying pond is arranged in concentrating clarifying pond in Teat pipette, sodium hypochlorite dosing pump and sodium hydroxide dosing pump
Bottom is respectively set mud discharging mouth A16 and B17 and is connected by sludge pump 18 with plate and frame type filter-press 19；The softening pond A3 and
B5 is underground type armored concrete system, and dischargeable capacity is the 2h amount of high efficiency clarification tank A2 and B4 water outlet.
The ultrafiltration apparatus of the concentrating and treating system 6 includes connected self-cleaning filter, ultrafiltration apparatus and the ultrafiltration of sequence
Water tank, wherein ultrafiltration membrane uses ceramic membrane in ultrafiltration apparatus, and the material of ceramic membrane is α-aluminium oxide, pore size filter 50nm, ceramics
The operating flux 150L/m of ultrafiltration membrane elements2·h；The nanofiltration device of the concentrating and treating system 6 includes the connected nanofiltration of sequence
Water pump, nanofiltration cartridge filter, nanofiltration equipment and nanofiltration water producing tank, wherein nanofiltration membrane uses scroll-type antipollution in nanofiltration equipment
Low pressure organic hybrid films, two sections of level-one, the average flux value of nanofiltration membrane is 18LMH；The concentrating and treating system 6 it is reverse osmosis
Device is high pressure rolling, including sequence connected reverse osmosis delivery pump, reverse osmosis cartridge filter, reverse osmosis booster and reverse osmosis
Saturating equipment, wherein the reverse osmosis membrane in reverse osmosis equipment use network pipe type high pressure reverse osmosis membrane and operating pressure for 105bar,
Average flux value is 12LMH.
The evaporative crystallization processing system 7 is using steam heat driven compressor forced circulation crystal system.
The centrifugal drying system 8 includes cyclone hydraulic separators 20, centrifugal dehydrator 21 and the drier 22 being linked in sequence,
Wherein air-introduced machine of the installation with bag filter on drier.
The automatic packaging system 9 include the connected feed bin of sequence, automatic gauge claim, automatic packaging machine, sack closer, net
Belt conveyor and automatic stacking machine；Wherein the feed bin of automatic packaging system 9 is connected with the drier of centrifugal drying system 8.
The course of work of hot compression desulfurization wastewater zero-discharge treatment system in the present invention are as follows: desulfurization wastewater and acid-alkali regeneration are useless
Water initially enters wastewater disposal basin 1, then introduces high efficiency clarification tank A2, adds flocculation respectively in the mixing pit of high efficiency clarification tank A2
Agent, NaOH and Na2CO3Calcium and magnesium ion is eliminated, flocculation aid is continuously added in the flocculation basin of high efficiency clarification tank A2, subsequently into height
The concentrating clarifying pond of effect clarifying basin A2 is separated by solid-liquid separation, removes ammonia nitrogen and adjusts pH value, and water outlet enters softening pond A3, then
It is re-introduced into high efficiency clarification tank B4, adds flocculant, NaOH and Na respectively in the mixing pit of high efficiency clarification tank B42CO3Elimination calcium,
Magnesium ion continuously adds flocculation aid in the flocculation basin of high efficiency clarification tank B4, subsequently into the concentrating clarifying of high efficiency clarification tank B4
Pond is separated by solid-liquid separation, removes ammonia nitrogen and adjusts pH value, and water outlet enters softening pond B5, then will be by sofening treatment twice
Row is respectively set in the concentrating clarifying bottom of pond portion of softened water introducing concentrating and treating system 6, high efficiency clarification tank A2 and high efficiency clarification tank B4
Mud mouth A16 and mud discharging mouth B17 is simultaneously connected by sludge pump 18 with plate and frame filter press 19, and the sludge of generation is transported outward, is changed through tubular type
It is successively filtered again through ultrafiltration apparatus 11, nanofiltration device 12 and reverse osmosis unit 13 after hot device 10 is cooling, at concentrated processing system 6
Fresh water collecting after reason is pumped to reuse in boiler of power plant make up water treatment system ultrafiltration water tank, dense salt by water to fresh-water tank 14
Water is collected to strong brine case 15, and strong brine enters evaporative crystallization processing system 7, heated and flash distillation, water as a vapor by
It separates, dense salt slurry becomes hypersaturated state, and the crystal of salt is precipitated from solution therewith, and dense salt slurry is discharged into centrifugal drying system
8 successively through cyclone hydraulic separators 20, centrifugal dehydrator 21 and drier 22 progress solid-liquor separation and after being dried, and solid is through automatic
Packaging system 9 is packed, and centrifugate is collected the return evaporative crystallization processing system 7 in mother liquor tank and handled again, to reach zero-emission
Put processing desulfurization wastewater.
To verify treatment process and processing system of the present invention, inventor is in certain power plant to according to treatment process of the present invention and place
The scheme of reason system is installed, which has source at two, and 1 wastewater flow rate of desulfurization wastewater is 19t/h, and desulfurization is useless
2 wastewater flow rate of water is 20.4t/h, amounts to 39.4t/h, and water quality difference is as shown in Table 1 and Table 2:
1 desulfurization wastewater of table, 1 water quality table
| Serial number | Project | Unit | Waste water treatment system water outlet | Absorption tower slurries | Absorption tower slurries |
| 18 | Total arsenic (As) | mg/L | —— | 1.2 | 0.18 |
| 19 | Total lead (Pb) | mg/L | —— | 0.006 | 0.1 |
| 20 | Total nickel (Ni) | mg/L | —— | 1.27 | 0.98 |
| 21 | Total zinc (Zn) | mg/L | —— | 8.50 | 7.84 |
| 22 | TDS | mg/L | 29455 | 31960 | —— |
| 23 | Conductivity (25) | us/cm | 44600 | 46900 | —— |
2 desulfurization wastewater of table, 2 water quality
Waste water further includes that Boiler water Feeding System system ion exchange acid-alkali regeneration waste water and condensed water precision processing system are mixed
Bed regenerative wastewater:
Boiler water Feeding System ion-exchange unit mainly removes K micro in water after reverse osmosis unit+、Na+、Cl-、
CO2Deng a small amount of Ca2+、Mg2+、SO4 2-Total draining, regeneration liquid waste master are just being rinsed in equal divalents ion, yin and yang resin regeneration, displacement, front end
Wanting composition is NaCl, and waste discharge amount is 1t/h.Ion exchange regenerant acidic and alkaline waste water water quality is shown in Table 3:
3 boiler feedwater ion exchange regenerant acidic and alkaline waste water water quality table of table
| Serial number | Project | Unit | Numerical value |
| 1 | K+ | mg/L | 100 |
| 2 | Na+ | mg/L | 5500 |
| 3 | Ca2+ | mg/L | 500 |
| 4 | Mg2+ | mg/L | 150 |
| 5 | Cl- | mg/L | 7200 |
| 6 | SO4 2- | mg/L | 400 |
| 7 | HCO3 - | mg/L | 2700 |
| 8 | PH | ~8 | |
| 9 | Total salinity | mg/L | 17000 |
| 10 | SiO2 | mg/L | ~80 |
Condensate polishing treatment mixed bed is mainly to remove Na micro in unit condensed water+、NH4+、Cu2+、Fe2+、Fe3+、Cl-
Total draining is just being rinsed Deng the regeneration of, yin and yang resin, displacement, front end, regeneration liquid waste main ingredient is NaCl, is secondly NH4 +, discharge useless
Water is 1t/h.Mixed bed regenerated acid and alkali waste water quality is shown in Table 4:
Table 2-4 condensate polishing treatment mixed bed regenerated acid and alkali waste water quality table
The mixing water of above-mentioned waste water is handled, it can be achieved that zero-emission using treatment process and processing system of the invention
Processing finally obtains the sodium chloride crystal salt that product purity is 97.5%, and processing system process design of the present invention is reasonable, is
It unites stable, waste water treatment efficiency is high, effectively reduces processing cost.
Claims (10)
1. a kind of hot compression zero emission treatment of desulfured waste water, which comprises the following steps:
(1) desulfurization wastewater and acid-alkali regeneration waste water clarification and sofening treatment: are introduced into efficient clarification system, the efficient clarification system
System includes mixing pit, flocculation basin and concentrating clarifying pond, adds flocculant, NaOH and Na respectively in mixing pit2CO3Eliminate calcium, magnesium
Ion continuously adds flocculation aid in flocculation basin, is separated by solid-liquid separation subsequently into concentrating clarifying pond, removes ammonia nitrogen and adjust pH
Value, water outlet enter softening pond, the sludge outward transport of generation, and the water outlet for softening pond repeats aforementioned treatment Step 1 time；
(2) concentration: softened water enters ultrafiltration apparatus after cooling and is handled, ultrafiltration apparatus water outlet enter nanofiltration device into
Row processing, is handled, the fresh water collecting after reverse osmosis unit is concentrated to fresh-water tank, by water pump subsequently into reverse osmosis unit
It send to reuse in boiler of power plant make up water treatment system ultrafiltration water tank, strong brine is collected to strong brine case, ultrafiltration apparatus and nanofiltration
The draining of device is recycled to step (1) and is handled；
(3) evaporative crystallization: strong brine enters evaporated crystallization device, and temperature rises to boiling point after exchanging heat, subsequently into degassing tower；?
In degassing tower, strong brine on filler, and flows downward be in contact with upstream steam step by step through nozzles spray, and removing is not
Solidifying gas, the gas of removing drain into atmosphere together with steam；Strong brine after degassed is sent from degassing tower discharge to crystallizer, warp
Heating and flash distillation, water are separated as a vapor, become hypersaturated state, shape is precipitated in the crystal of salt from solution therewith
At dense salt slurry；
(4) dry packing is handled: dense salt slurry drains into centrifugal drying system and carries out solid-liquor separation, and solid is packed after drying, is centrifuged
Liquid is collected the return crystallizer in tank and is handled again.
2. hot compression zero emission treatment of desulfured waste water according to claim 2, which is characterized in that described by twice
The total hardness with calcium carbonate of softened water after clarification and sofening treatment is controlled in 20mg/L or less.
3. hot compression zero emission treatment of desulfured waste water according to claim 1, which is characterized in that the step (2)
The ultrafiltration membrane of middle ultrafiltration apparatus uses ceramic membrane, and material is α-aluminium oxide, and pore size filter is not more than 50nm, and operating flux is not high
In 150L/m2·h；Nanofiltration membrane uses scroll-type antipollution low pressure organic hybrid films in nanofiltration device, and two sections of level-one, average film is logical
Magnitude is 15~20LMH；Reverse osmosis unit is high pressure rolling, and wherein reverse osmosis membrane uses network pipe type high pressure reverse osmosis membrane, operation
Pressure is 90-120bar, and average flux value is 10-15LMH.
4. hot compression zero emission treatment of desulfured waste water according to claim 1, which is characterized in that the step (3)
Using steam heat driven compressor forced circulation crystal system.
5. implementing the processing system of any hot compression zero emission treatment of desulfured waste water of Claims 1 to 55, feature
It is, including the connected wastewater disposal basin (1) of sequence, high efficiency clarification tank A (2) softens pond A (3), high efficiency clarification tank B (4), softening
Pond B (5), concentrating and treating system (6), evaporative crystallization processing system (7), centrifugal drying system (8) and automatic packaging system
(9)；Wherein efficient clarification system A (2) and efficient clarification system B (4) are identical, include the connected mixing pit of sequence, flocculation basin
With concentrating clarifying pond；Soften pond A (3) and softening pond B (5) is identical；Concentrating and treating system (6) is connected board-like comprising sequence
Heat exchanger (10), ultrafiltration apparatus (11), nanofiltration device (12) and reverse osmosis unit (13), the fresh water of the reverse osmosis unit (13)
Case (14) is connected with boiler of power plant make up water treatment system ultrafiltration water tank, the strong brine case (15) of reverse osmosis unit (13) and evaporation
Crystallization treatment system (7) is connected；The leakage fluid dram of evaporative crystallization processing system (7) is connected with the feed inlet of centrifugal drying system (8)；
The mother liquor tank of centrifugal drying system (8) is connected with the inlet of evaporative crystallization processing system (7).
6. hot compression desulfurization wastewater zero-discharge treatment system according to claim 5, which is characterized in that the wastewater disposal basin
(1) dischargeable capacity cannot be less than the processing water of 48h；It is further respectively had on the efficient clarification system A (2) and B (4) and scrapes mud
Machine, and flocculant medicine system, NaOH medicine system and Na are set on mixing pit therein2CO3Medicine system, on flocculation basin
Flocculation aid medicine system is set, blender is additionally provided with inside mixing pit and flocculation basin, hydrochloric acid dosing is set on concentrating clarifying pond
Mechanical agitating clarifier, concentrating clarifying bottom of pond is arranged in concentrating clarifying pond in pump, sodium hypochlorite dosing pump and sodium hydroxide dosing pump
Portion is respectively set mud discharging mouth A (16) and mud discharging mouth B (17) and is connected by sludge pump (18) with plate and frame filter press (19)；It is described soft
Changing pond A (3) and B (5) is underground type armored concrete system, dischargeable capacity be high efficiency clarification tank A (2) and B (4) water outlet 1~
2h amount.
7. hot compression desulfurization wastewater zero-discharge treatment system according to claim 5, which is characterized in that the concentration
The ultrafiltration apparatus of system (6) includes connected plate heat exchanger, self-cleaning filter, ultrafiltration apparatus and the ultrafiltration water tank of sequence,
Ultrafiltration membrane uses ceramic membrane in middle ultrafiltration apparatus, and the material of ceramic membrane is α-aluminium oxide, and pore size filter is not more than 50nm, ceramics
The operating flux of ultrafiltration membrane elements is not higher than 150L/m2·h；The nanofiltration device of the concentrating and treating system (6) includes sequence phase
Nanofiltration water pump, nanofiltration cartridge filter, nanofiltration equipment and nanofiltration water producing tank even, wherein nanofiltration membrane uses scrollwork in nanofiltration equipment
Formula antipollution low pressure organic hybrid films, two sections of level-one, the average flux value of nanofiltration membrane is 15-20LMH；The concentration system
The reverse osmosis unit of system (6) is high pressure rolling, including the connected reverse osmosis delivery pump of sequence, reverse osmosis cartridge filter, reverse osmosis
Saturating booster and reverse osmosis equipment, wherein the reverse osmosis membrane in reverse osmosis equipment using network pipe type high pressure reverse osmosis membrane and is averaged
Membrane flux value is 10-15LMH.
8. hot compression desulfurization wastewater zero-discharge treatment system according to claim 5, which is characterized in that the evaporative crystallization
Processing system (7) is using steam heat driven compressor forced circulation crystal system.
9. hot compression desulfurization wastewater zero-discharge treatment system according to claim 5, which is characterized in that the centrifugation is dry
Drying system (8) includes cyclone hydraulic separators (20), centrifugal dehydrator (21) and the drier (22) being linked in sequence, wherein on drier
Installation has the air-introduced machine of bag filter.
10. hot compression desulfurization wastewater zero-discharge treatment system according to claim 5, which is characterized in that described is automatic
Packaging system (9) include the connected feed bin of sequence, automatic gauge claim, automatic packaging machine, sack closer, net belt type conveyer and automatic
Stacking machine；Wherein the feed bin of automatic packaging system (9) is connected with the drier of centrifugal drying system (8).
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