CN108423903A - Dyeing waste water zero-discharge treatment system - Google Patents
Dyeing waste water zero-discharge treatment system Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention belongs to water treatment fields, are related to treatment of dyeing wastewater field, and in particular to a kind of dyeing waste water zero-discharge treatment system, the zero-discharge treatment system include pretreatment system, film concentration systems, crystal system, reclaiming system；Pretreatment system includes ozone water outlet and melded system；Film concentration systems include counter-infiltration system, nanofiltration system, seawater reverse osmosis permeable system, super counter-infiltration system, super nanofiltration system and production pond；Crystal system uses freezing and crystallizing and/or evaporative crystallization；Water inlet obtains solidfied material by the pretreatment system, the film concentration systems and the crystal system successively, and the film concentration systems are connected with the reclaiming system；The solidfied material is sodium chloride or sodium sulphate.The present invention have system operatio it is simple, technique is flexible, stable, and effluent quality is good, be convenient for automatic management the characteristics of.
Description
Technical field
The invention belongs to water treatment fields, are related to treatment of dyeing wastewater field, and in particular to a kind of dyeing waste water zero-emission
Processing system.
Background technology
Dyeing waste water contains a large amount of dyestuffs, auxiliary agent, slurry, soda acid and inorganic salts etc., its main feature is that composition is complicated, salt content
The features such as height, high organic content, basicity are high, coloration is deep, biodegradability is poor.If do not handled before discharge it,
The soluble inorganic salt of Coal Gas Washing Cycling Water and toxic organic compound difficult to degrade can cause serious environmental pollution, to soil and ground
Table water, underground water damage.Since printing and dyeing enterprise produces the diversity of kind, the complexity of waste water composition is determined, therefore,
Single treatment technology and technique are extremely difficult to require.Although the techniques of Dyeing Wastewater Treatment and technique of domestic and international practical application compared with
It is more, but be still the combination of biological treatment and materialization treatment process or its technology mostly.And the zero-emission relatively difficult to achieve of these technologies, and
And it is faced with the secondary pollutions problems such as processing biochemical sludge, crystallization mixed salt；Energy consumption is big；Huge structure；Dwell time of sewage length,
Sewage degree of transitivity is more；The degree of automation is poor；Take up a large area, the time limit of constructing it is longer；Construction by geographical environment, geology and geomorphology,
The restriction of seasonal factor；Operational administrative cumbersome the shortcomings of being not easy to realize.
Wastewater zero discharge refers to that industrial wastewater is reached all (99% or more) recyclings, the salt in water by handling
Class and pollutant are discharged using solid forms by condensing crystallizing or as industrial chemicals.By realizing the zero-emission of dyeing waste water,
It can realize emission reduction targets, waste water reclaiming, non-wastewater discharge, while reduce water consumption, reduce operating cost, can be used for
The Nacl of industrial use, solves the problems, such as wastewater treatment.Final means of the evaporation technique as realization technique of zero discharge, by
It is very big in the required energy of its phase transition process, become the key for restricting zero-emission cost.Most current technique is directly to place
Reason waste water is evaporated, and the operating cost of zero-emission has been significantly greatly increased.Therefore, by technological design, its final evaporation is reduced
Treating capacity is the core for reducing zero discharge waste-water processing cost.
Invention content
It is an object of the present invention to for the problem present on, a kind of dyeing waste water zero-discharge treatment system is provided.
For this purpose, the above-mentioned purpose of the present invention is achieved through the following technical solutions：
Dyeing waste water zero-discharge treatment system, including pretreatment system, film concentration systems, crystal system, reclaiming system；
The pretreatment system includes ozone water outlet and melded system；
The film concentration systems include counter-infiltration system, nanofiltration system, seawater reverse osmosis permeable system, super counter-infiltration system, surpass
Grade nanofiltration system and production pond；
The crystal system uses freezing and crystallizing and/or evaporative crystallization；
Water inlet obtains solidfied material, the film by the pretreatment system, the film concentration systems and the crystal system successively
Concentration systems are connected with the reclaiming system；
The solidfied material is sodium chloride or sodium sulphate.
Further, the sludge that the melded system generates enters filter press filter-press dehydration after being pumped into sludge concentration tank decrement
Filter cake and concentrated water are generated, the concentrated water that the filter press filter-press dehydration generates is squeezed into the ozone water outlet, the sludge concentration tank
The concentrated water generated during decrement treatment is squeezed into the ozone water outlet.
Further, the melded system water outlet enters the film concentration systems, and the film concentration systems include anti-
Osmosis system, nanofiltration system, seawater reverse osmosis permeable system, super counter-infiltration system, super nanofiltration system and production pond；
The first order production water and first order concentrated water that melded system water outlet is handled by the counter-infiltration system, described the
Level-one produces water and enters the production pond, and the first order concentrated water is handled into the nanofiltration system；
It handles to obtain second level production water and second level concentrated water through the nanofiltration system, water is produced through the seawater reverse osmosis in the second level
Permeable system handle the third level production water and third level concentrated water, the second level concentrated water handle to obtain into the super nanofiltration system
Level V concentrated water and level V produce water；
The third level concentrated water handles to obtain fourth stage production water and fourth stage concentrated water, the third through the super counter-infiltration system
Grade production water and fourth stage production water are directly entered the production pond, and the fourth stage concentrated water is directly entered crystal system；
The level V concentrated water is directly entered crystal system, and the level V production water handles to obtain the 6th through the counter-infiltration system
Grade production water and the 6th grade of concentrated water, the 6th grade of production water are directly entered the production pond, and the 6th grade of concentrated water is recycled into institute
State in nanofiltration system with the first concentrated water mixed processing.
Further, super counter-infiltration system water outlet enters the crystal system, and the crystal system is chlorine
Change sodium solution evaporator, the super counter-infiltration system water outlet evaporates to obtain purity >=98% by sodium chloride solution evaporator
The sodium chloride that sodium chloride and purity are 50~65%.
The super nanofiltration system water outlet enters the crystal system, and the crystal system includes freezing and crystallizing, sodium sulphate
Evaporator and the evaporation of metabisulfite solution evaporator, freezing and crystallizing is passed through in the super nanofiltration system water outlet successively, sodium sulphate evaporates
Device evaporates and metabisulfite solution evaporator evaporates to obtain the sodium sulphate of purity >=98.5% and purity for 60~70% sodium sulphate.
The sal glauberi that purity >=98% is obtained in the refrigeration crystallization process, controlled at -5~-10 DEG C.
The evaporator that the evaporation and crystal process uses is MVR evaporators.
Water produces water into the reclaiming system, the production pond Zhong Shui after counter-infiltration system is handled in the production pond
The concentrated water obtained after counter-infiltration system is handled enters the crystal system.
The crystal system is metabisulfite solution evaporator, and the metabisulfite solution evaporator is MVR evaporators.
The counter-infiltration system is reverse osmosis using one or more levels.
Hereinafter, being described in detail with regard to dyeing waste water zero-discharge treatment system.
Melded system main function is the suspended matter and partial organic substances reduced in ozone water outlet in pretreatment, in combination with
Liquid caustic soda, sodium carbonate dosing, effectively reduce hardness.Concrete operations principle is as follows：Liquid caustic soda, carbonic acid are sequentially added in melded system
Sodium removes the total hardness in waste water, it is dense after flocculation reaction then to add aluminium polychloride, anion-polyacrylamide
Water detaches, and most of total hardness, suspended matter and the colloid in ozone water outlet are removed, and stablizes fortune for subsequent film concentration systems
Row creates favorable conditions.
Film concentration systems include counter-infiltration system, nanofiltration system, seawater reverse osmosis permeable system, super counter-infiltration system, super
Nanofiltration system and production pond.The melded system water outlet obtained after pretreatment enters film concentration systems to TDS, chlorion, sulphur
Acid group and COD etc. carry out interception filtering, and achieve the purpose that decrement concentration, and production water enters the processing that production pond waits for next step.
Counter-infiltration system be it is a kind of using pressure difference as motive force solution in sub-argument go out solvent UF membrane operation, with naturally osmotic
Effect is on the contrary, achieve the purpose that separation, extraction, purifying and concentration.Nanofiltration system carries out cross-flow filtration to first order concentrated water, right
Sulfate intercepts, and is not intercepted to sodium chloride, therefore a large amount of sodium chloride enters in second level production water, and a large amount of sodium sulphate enter second
In grade concentrated water.Super nanofiltration system carries out cross-flow filtration to second level concentrated water, and rejection is higher than nanofiltration system, makes sodium chloride
It is produced in water into level V, sodium sulphate enters in level V concentrated water, and level V concentrated water is directly entered crystal system.Sea-water reverse osmose
System carries out interception filtering using to COD, TDS, chlorion and sulfate radical etc., and third level production water is directly entered under the waiting of production pond
The processing of one step, to achieve the purpose that decrement concentration；Seawater reverse osmosis permeable system can bear the pressure of bigger, relative to other films
For system, the salinity in concentrated water can do more.Super counter-infiltration system still be using to COD, TDS, chlorion and
Sulfate radical etc. carries out interception filtering, and fourth stage production water is directly entered production pond, and fourth stage concentrated water is directly entered crystal system, to reach
To the purpose of decrement concentration.
4th concentrated water and the 5th concentrated water respectively enter crystal system, and the 4th concentrated water is directly entered sodium chloride solution evaporation
Device is evaporated crystallization, finally obtains sodium chloride and the purity of purity >=98% as 50~65% sodium chloride.5th concentrated water
First freezing and crystallizing obtains the sal glauberi of purity >=98% at a temperature of -5~-10 DEG C, then by ten water of freezing and crystallizing
Sodium sulphate takes out from the 5th concentrated water, obtains the sodium sulphate of purity >=98.5% into sodium sulphate evaporator, will take out freezing and crystallizing
Process recycled before the 5th concentrated water afterwards returns.It is molten that the water produced in pond is introduced into sodium sulphate after counter-infiltration system is handled
It is evaporated crystallization in liquid evaporator and obtains the sodium sulphate that purity is 60~70%.
The indirect steam generated in evaporative crystallization uses cooling water condensation at condensed water again, and the thermal energy in indirect steam is transmitted to
It is diffused into again in air in cooling water and causes thermal energy waste and cooling-water consumption.What evaporator was generated evaporator using compressor
Indirect steam, which carries out compression, makes its pressure and temperature increase, and then substitutes steam as the heat source of evaporator, realizes indirect steam
The recycling of middle thermal energy so that the heat energy recycling of evaporator.
Dyeing waste water zero-discharge treatment system provided by the invention, has the advantages that：
（1）The present invention uses materializing strategy, film concentration to crystallize, and reuse treatment process realizes the whole zero-emission of dyeing waste water
Target, waste water fully recovering, generated sludge, solidfied material can be used as fuel combustion or Nacl reuse after dehydration completely,
It preserves the ecological environment；
（2）The system of the present invention carries out decrement concentration reuse to dyeing waste water, reduces the external water consumption in dyeing and printing process, drops
Low overall operation cost；
（3）Zero discharging system mesophytization treatment process combination of the present invention, improves the treatment effeciency to pollutant, ensure that follow-up
The normal operation of system；
（4）Present system pretreatment stage is discharged using ozone and melded system, the total hardness of waste water is reduced, after alleviating
The load of continuous film concentration systems, extends membranous system service life；
（5）Inventive film enriching stage is combined using reverse osmosis, nanofiltration, sea water desalination etc., and containing for follow-up concentrated water is greatly improved
Salt amount reduces the processing energy consumption of evaporation technology, reduces operating cost；
（6）The system operatio of the present invention is simple, and technique is flexible, stable, and effluent quality is good, is convenient for automatic management.
Description of the drawings
In order to illustrate more clearly of technical solution of the present invention, the required attached drawing of the present invention will be made simply below
It introduces, it should be apparent that, drawings discussed below is only the related legend of the present invention, and those of ordinary skill in the art are come
It says, without creative efforts, other attached drawings still can be obtained according to the attached body of offer.
Fig. 1 is the flow diagram of dyeing waste water zero-discharge treatment system provided by the invention；
Fig. 2 is the flow chart of pretreatment system in Fig. 1；
Fig. 3 is the flow chart of film concentration systems in Fig. 1；
Fig. 4 is the flow chart one of crystal system in Fig. 1；
Fig. 5 is the flowchart 2 of crystal system in Fig. 1.
Specific implementation mode
Clear, complete description is carried out to technical scheme of the present invention with reference to the accompanying drawings and examples, it is clear that described
Embodiment be only a part of the embodiment of the present invention, instead of all the embodiments.Based on embodiment in the present invention, this field
The every other embodiment that those of ordinary skill is obtained without making creative work, belongs to protection of the present invention
Range.
As shown in Figure 1, dyeing waste water zero-discharge treatment system include pretreatment system, film concentration systems, crystal system and
Reclaiming system.Water inlet passes through pretreatment system, film concentration systems and crystal system and obtains solidfied material successively, film concentration systems with time
It is connected with system；Solidfied material is sodium chloride or sodium sulphate.
As shown in Fig. 2, pretreatment system includes ozone water outlet, melded system and sludge condensation, water inlet by ozone water outlet,
Melded system processing degrades the total hardness of water inlet to obtain melded system water outlet, and the sludge generated in melded system is taken out
Enter filter press filter-press dehydration generation filter cake and concentrated water after entering sludge concentration tank decrement, the concentrated water that filter press filter-press dehydration generates is beaten
Enter in ozone water outlet, the concentrated water generated during sludge concentration tank decrement treatment is squeezed into ozone water outlet.Softening system in pretreatment
System main function is that the suspended matter and partial organic substances reduced in ozone water outlet is effectively dropped in combination with liquid caustic soda, sodium carbonate dosing
Soft.Concrete operations principle is as follows：Liquid caustic soda, sodium carbonate are sequentially added in melded system, remove the total hardness in waste water, so
After add aluminium polychloride, anion-polyacrylamide after flocculation reaction concentrated water detach, ozone water outlet in big portion
Point total hardness, suspended matter and colloid are removed, and are created favorable conditions for subsequent film concentration systems stable operation.
As shown in figure 3, melded system water outlet enters film concentration systems, film concentration systems include counter-infiltration system, nanofiltration system
System, seawater reverse osmosis permeable system, super counter-infiltration system, super nanofiltration system and production pond.The softening obtained after pretreatment
System water outlet carries out interception filtering into film concentration systems to TDS, chlorion, sulfate radical and COD etc., and reaches decrement concentration
Purpose, production water enter the processing that production pond waits for next step.Melded system water outlet passes through counter-infiltration system is handled first
Grade production water and first order concentrated water, first order production water enter production pond, and first order concentrated water enters nanofiltration system processing, nanofiltration system pair
First order concentrated water carries out cross-flow filtration, intercepts to sulfate, is not intercepted to sodium chloride, therefore a large amount of sodium chloride enters second
In grade production water, a large amount of sodium sulphate enter in the concentrated water of the second level.Counter-infiltration system is one kind using pressure difference as in motive force solution
Sub-argument goes out the UF membrane operation of solvent, with the effect of naturally osmotic on the contrary, achieving the purpose that detach, extract, purify and concentrate.
It handles to obtain second level production water and second level concentrated water through nanofiltration system, second level production water handles to obtain third through seawater reverse osmosis permeable system
Grade production water and third level concentrated water.Seawater reverse osmosis permeable system carries out interception filtering using to COD, TDS, chlorion and sulfate radical etc.,
Third level production water is directly entered the processing that production pond waits for next step, to achieve the purpose that decrement concentration；Seawater reverse osmosis permeable system
The pressure that can bear bigger, for other membranous systems, the salinity in concentrated water can do more.Second level concentrated water enters
Super nanofiltration system processing, super nanofiltration system carry out cross-flow filtration to second level concentrated water, and rejection is higher than nanofiltration system,
Sodium chloride is set to enter in level V production water, sodium sulphate enters in level V concentrated water, and level V concentrated water is directly entered crystal system.The
Three-level concentrated water handles to obtain fourth stage production water and fourth stage concentrated water through super counter-infiltration system, and the third level produces water and the fourth stage produces water
It is directly entered production pond, fourth stage concentrated water is directly entered crystal system.Super counter-infiltration system still be using to COD,
TDS, chlorion and sulfate radical etc. carry out interception filtering, to achieve the purpose that decrement concentration.Level V concentrated water is directly entered crystallization
System, level V produce water and handle to obtain the 6th grade of production water and the 6th grade of concentrated water through counter-infiltration system, and the 6th grade of production water is directly entered
Is produced from pond, the 6th grade of concentrated water is recycled into nanofiltration system and the first concentrated water mixed processing.
As shown in figure 4, it is that fourth stage concentrated water enters that crystal system, which uses evaporation and crystallization system, super counter-infiltration system water outlet,
Evaporation and crystallization system, the evaporation and crystallization system are sodium chloride solution evaporator, which is MVR evaporators, super reverse osmosis
System water outlet is that fourth stage concentrated water evaporates to obtain purity to be 98.5% sodium chloride and 60% chlorine by sodium chloride solution evaporator
Change sodium.
As shown in figure 5, crystal system uses freezing and crystallizing and evaporation and crystallization system, super nanofiltration system water outlet the i.e. the 5th dense
Water freezing and crystallizing at a temperature of -5~-10 DEG C obtains the sal glauberi that purity is 99%, then by ten water of freezing and crystallizing
Sodium sulphate takes out from the 5th concentrated water, and into evaporation and crystallization system, which is sodium sulphate evaporator, the evaporator
For MVR evaporators, the sal glauberi that purity is 99% obtains the sodium sulphate of purity 99% through sodium peroxydisulfate evaporator evaporative crystallization,
Process recycled before the 5th concentrated water after taking-up freezing and crystallizing is returned.The water in pond will be produced to handle by counter-infiltration system
After introduce evaporation and crystallization system, which is metabisulfite solution evaporator and the evaporator is in MVR evaporators, is steamed
Hair crystallization obtains the sodium sulphate that purity is 64%.
The indirect steam generated in evaporative crystallization uses cooling water condensation at condensed water again, and the thermal energy in indirect steam is transmitted to
It is diffused into again in air in cooling water and causes thermal energy waste and cooling-water consumption.What evaporator was generated evaporator using compressor
Indirect steam, which carries out compression, makes its pressure and temperature increase, and then substitutes steam as the heat source of evaporator, realizes indirect steam
The recycling of middle thermal energy so that the heat energy recycling of evaporator.
Claims (10)
1. dyeing waste water zero-discharge treatment system, which is characterized in that the zero-discharge treatment system includes pretreatment system, film concentration
System, crystal system, reclaiming system；
The pretreatment system includes ozone water outlet and melded system；
The film concentration systems include counter-infiltration system, nanofiltration system, seawater reverse osmosis permeable system, super counter-infiltration system, surpass
Grade nanofiltration system and production pond；
The crystal system uses freezing and crystallizing and/or evaporative crystallization；
Water inlet obtains solidfied material, the film by the pretreatment system, the film concentration systems and the crystal system successively
Concentration systems are connected with the reclaiming system；
The solidfied material is sodium chloride or sodium sulphate.
2. dyeing waste water zero-discharge treatment system according to claim 1, which is characterized in that the melded system generated
Sludge enters filter press filter-press dehydration generation filter cake and concentrated water, the filter press filter-press dehydration production after being pumped into sludge concentration tank decrement
Raw concentrated water is squeezed into the ozone water outlet, and the concentrated water generated during the sludge concentration tank decrement treatment squeezes into the ozone
In water outlet.
3. dyeing waste water zero-discharge treatment system according to claim 1, which is characterized in that the melded system be discharged into
Enter the film concentration systems, the film concentration systems include counter-infiltration system, nanofiltration system, seawater reverse osmosis permeable system, super
Counter-infiltration system, super nanofiltration system and production pond；
The first order production water and first order concentrated water that melded system water outlet is handled by the counter-infiltration system, described the
Level-one produces water and enters the production pond, and the first order concentrated water is handled into the nanofiltration system；
It handles to obtain second level production water and second level concentrated water through the nanofiltration system, water is produced through the seawater reverse osmosis in the second level
Permeable system handle the third level production water and third level concentrated water, the second level concentrated water handle to obtain into the super nanofiltration system
Level V concentrated water and level V produce water；
The third level concentrated water handles to obtain fourth stage production water and fourth stage concentrated water, the third through the super counter-infiltration system
Grade production water and fourth stage production water are directly entered the production pond, and the fourth stage concentrated water is directly entered crystal system；
The level V concentrated water is directly entered crystal system, and the level V production water handles to obtain the 6th through the counter-infiltration system
Grade production water and the 6th grade of concentrated water, the 6th grade of production water are directly entered the production pond, and the 6th grade of concentrated water is recycled into institute
State in nanofiltration system with the first concentrated water mixed processing.
4. dyeing waste water zero-discharge treatment system according to claim 1, which is characterized in that the super reverse osmosis system
System water outlet enters the crystal system, and the crystal system is sodium chloride solution evaporator, the super counter-infiltration system water outlet
Evaporate to obtain sodium chloride and the purity of purity >=98% by sodium chloride solution evaporator for 50~65% sodium chloride.
5. dyeing waste water zero-discharge treatment system according to claim 1, which is characterized in that the super nanofiltration system goes out
Water enters the crystal system, and the crystal system includes that freezing and crystallizing, sodium sulphate evaporator and metabisulfite solution evaporator steam
Hair, the super nanofiltration system water outlet are passed through freezing and crystallizing, the evaporation of sodium sulphate evaporator and metabisulfite solution evaporator and are steamed successively
The sodium sulphate that hair obtains the sodium sulphate of purity >=98.5% and purity is 60~70%.
6. dyeing waste water zero-discharge treatment system according to claim 5, which is characterized in that in the refrigeration crystallization process
The sal glauberi of purity >=98% is obtained, controlled at -5~-10 DEG C.
7. dyeing waste water zero-discharge treatment system according to claim 1, which is characterized in that the evaporation and crystal process
The evaporator used is MVR evaporators.
8. dyeing waste water zero-discharge treatment system according to claim 1, which is characterized in that water passes through in the production pond
Production water enters the reclaiming system after counter-infiltration system processing, and water obtains dense after counter-infiltration system is handled in the production pond
Water enters the crystal system.
9. dyeing waste water zero-discharge treatment system according to claim 8, which is characterized in that the crystal system is sulfuric acid
Sodium solution evaporator, and the metabisulfite solution evaporator is MVR evaporators.
10. dyeing waste water zero-discharge treatment system according to claim 8, which is characterized in that the counter-infiltration system is adopted
It is reverse osmosis with one or more levels.
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| CN109717339A (en) * | 2019-01-17 | 2019-05-07 | 天津中民普健海水淡化科技发展有限公司 | A kind of preparation method of the specific use beverage from seawater and obtained specific use beverage |
Citations (8)
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