CN106630352A - Desulfurization waste water recycling and salt recycling treatment system - Google Patents
Desulfurization waste water recycling and salt recycling treatment system Download PDFInfo
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- CN106630352A CN106630352A CN201611225407.XA CN201611225407A CN106630352A CN 106630352 A CN106630352 A CN 106630352A CN 201611225407 A CN201611225407 A CN 201611225407A CN 106630352 A CN106630352 A CN 106630352A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- 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 invention discloses a desulfurization waste water recycling and salt recycling treatment system. The desulfurization waste water recycling and salt recycling treatment system comprises a pretreatment unit, a nanofiltration separation unit, a reverse osmosis concentration unit, a calcium sulfate crystallization unit and a sodium chloride crystallization unit. The desulfurization waste water recycling and salt recycling treatment system has the following characteristics: 1) the treatment system realizes zero emission, is low in investment cost and can operate continuously and stably; 2) salt recycling is realized by the system, available industrial-grade products can be directly obtained and the industrial value of the treatment system is further improved; 3) the treatment system improves the supersaturation degree of calcium sulfate by adding a stabilizing agent, enables the calcium sulfate to crystallize by adding a destabilizing agent and does not introduce other salt so as to reduce energy consumption of desalting treatment and further reduce the operation cost; and 4) the treatment system is low in agent cost, equipment cost and energy consumption, so that the whole operation and management cost is obviously lower than the cost of the existing process.
Description
Technical field
The present invention relates to field of industrial waste water treatment, specifically a kind of desulfurization wastewater reuse and the process of salt resource
System.
Background technology
Existing desulfurization wastewater reuse or zero discharge treatment are mainly using the double alkali tenderizer joint reverse osmosis membranes of lime soda ash
Concentration or evaporation technology.Though the double alkali tenderizers of lime soda ash are suitable for high hardness water process, due to the throwing of chemical agent
Plus increased process after water salt content it is high, and chemical sludge yield is big, causes the pollution or secondary pollution of environment.Counter-infiltration
Film is concentrated or evaporating and concentrating process can only obtain mixing salt, and mixing salt resource and cannot be also needed to as danger
Waste product is processed, and processing cost is at a relatively high.With desulfurization wastewater or other high rigidity, high sulfate radical, wastewater containing high chlorid
The requirement that depth tends to zero-emission is processed, needs a kind of rational processing system to adapt to the requirement of society.
The content of the invention
The technical assignment of the present invention is to provide that a kind of cost of investment is low, can continuously, the desulfurization wastewater reuse of stable operation and
The processing system of salt resource.
The present invention technical assignment realize in the following manner, the processing system of the desulfurization wastewater reuse and salt resource
Including pretreatment unit, nanofiltration separation unit, reverse osmosis concentration unit, crystal of calcium sulfate unit and sodium chloride crystalline element；
Described pretreatment unit is used for heavy metal and suspension, colloid and the partial organic substances gone in eliminating water；Including regulating reservoir,
Reaction tank, sedimentation basin, sludge concentration tank, sludge dewatering equipment, clear water reserviors and filter；
Described nanofiltration separation unit is used to improve the supersaturation concentration of calcium sulfate in water, is allowed to be separated with sodium chloride；Including receiving
Filter device；
Described reverse osmosis concentration unit is used to concentrate the product water of nanofiltration separation unit, improves the salt content of this unit concentrated water；Bag
Include high pressure reverse osmosis unit；
Described crystal of calcium sulfate unit is used for crystallization and separates out calcium sulphate crystal；Including calcium sulphate crystal thickener and centrifuge
One；
Described sodium chloride crystalline element is used for crystallization and separates out calcium sulphate crystal；Steam including sodium chloride crystal thickener, sodium chloride
Send out device, condenser and centrifuge two.
Agitator one, the water inlet connection waste pipe of regulating reservoir are installed in the regulating reservoir in described pretreatment unit
The water inlet for passing through pipeline communication reaction tank with sodium hydroxide solution pipeline, the delivery port of regulating reservoir, the delivery port of reaction tank leads to
Piping connects sedimentation basin, the top delivery port of sedimentation basin by pipeline communication clear water reserviors, the outlet of clear water reserviors by pipeline with
The inlet communication of filter；The outlet at bottom of described sedimentation basin is dense by the water inlet and sludge that pipeline is respectively communicated with reaction tank
The import in contracting pond.
Agitator two is installed in described reaction tank；Mud scraper one is installed in described sedimentation basin；Described sludge is dense
Mud scraper two is installed in contracting pond.
Sludge circulation pump is installed, described sedimentation basin is dense with sludge on the pipeline that described sedimentation basin is connected with reaction tank
Sludge excavationg pump is installed on the pipeline of contracting pond connection；Spoil disposal is installed on the outlet at bottom pipeline of described sludge concentration tank
Pump, the outlet of sludge pump is connected by pipeline with sludge dewatering equipment；Install on the pipeline that described clear water reserviors are connected with filter
There is clarified water pump.
The outlet that the import of the nanofiltration device in described nanofiltration separation unit passes through pipe-and-filter, it is described
Cartridge filter one and NF high-pressure pumps are installed on the pipeline between nanofiltration device and filter.
The import of the high pressure reverse osmosis unit in described reverse osmosis concentration unit is by pipeline and the side of nanofiltration device
Cartridge filter two and anti-is installed on the pipeline connected between outlet, described high pressure reverse osmosis unit and nanofiltration device
Infiltration high-pressure pump；The outlet of described high pressure reverse osmosis unit is connected with Water circulation pipeline is produced.
Described high pressure reverse osmosis unit is DTRO membrane modules, STRO membrane modules or high pressure rolled membrane module.
The import of calcium sulphate crystal thickener is by pipeline and the bottom of nanofiltration device in described crystal of calcium sulfate unit
Outlet, the outlet at bottom of calcium sulphate crystal thickener is connected by pipeline with centrifuge one；Calcium sulphate crystal thickener
The discharge channel of top exit and centrifuge one is by reflux line and the inlet communication of sedimentation basin.
The top inlet of the sodium chloride crystal thickener in described sodium chloride crystalline element is by pipeline and high pressure reverse osmosis
The outlet at bottom connection of device thoroughly, the outlet at bottom of sodium chloride crystal thickener is connected by pipeline with centrifuge two；Sodium chloride
The upper outlet of crystal thickener is connected by pipeline with sodium chloride evaporimeter, is provided with the discharge line of sodium chloride evaporimeter
Condenser.
Described centrifuge one and centrifuge two is link-suspended basket centrifuge.
The present invention a kind of desulfurization wastewater reuse and salt resource processing system compared to the prior art, with following spy
Point：
1）The processing system realizes zero-emission, and cost of investment is low, can continuously, stable operation.
2）The resource of salt is realized by the system, available technical grade product can be directly obtained, further carried
The industrial value of processing system is risen.
3）The processing system improves the degree of supersaturation of calcium sulfate except adding stabilizer, and adding destabilizing agent makes crystal of calcium sulfate
In addition, other salts are not re-introduced into, reduce the energy consumption of desalting processing, operating cost is further reduced.
4）The reagent cost of the processing system, equipment cost, energy consumption are all relatively low, so as to overall operation management cost can be made bright
The aobvious cost less than existing process.
Description of the drawings
Accompanying drawing 1 is a kind of structural representation of the processing system of desulfurization wastewater reuse and salt resource.
In figure：1st, regulating reservoir, 101, agitator one, 2, reaction tank, 201, agitator two, 3, sedimentation basin, 301, mud scraper
One, 4, sludge circulation pump, 5, sludge excavationg pump, 6, sludge concentration tank, 601, mud scraper two, 7, sludge pump, 8, clear water reserviors, 9, clear
Water pump, 10, filter, 11, cartridge filter one, 12, NF high-pressure pumps, 13, nanofiltration device, 14, calcium sulphate crystal thickener,
15th, centrifuge one, 16, cartridge filter two, 17, reverse osmosis high-pressure pump, 18, high pressure reverse osmosis unit, 19, sodium chloride crystal it is dense
Contracting machine, 20, sodium chloride evaporimeter, 21, condenser, 22, centrifuge two, 23, sludge dewatering equipment.
Specific embodiment
Embodiment 1：
The processing system of the desulfurization wastewater reuse and salt resource includes pretreatment unit, nanofiltration separation unit, reverse osmosis concentration
Unit, crystal of calcium sulfate unit and sodium chloride crystalline element；
Described pretreatment unit is used for heavy metal and suspension, colloid and the partial organic substances gone in eliminating water；Including regulating reservoir
1st, reaction tank 2, sedimentation basin 3, sludge concentration tank 6, sludge dewatering equipment 23, clear water reserviors 8 and filter 10；In described regulating reservoir 1
Agitator 1, the water inlet connection waste pipe of regulating reservoir 1 and sodium hydroxide solution pipeline are installed, by NaOH
Solution adjusts pH value 9-10；The water inlet that the delivery port of regulating reservoir 1 passes through pipeline communication reaction tank 2, the delivery port of reaction tank 2 leads to
Piping connects sedimentation basin 3, and, by pipeline communication clear water reserviors 8, the outlet of clear water reserviors 8 is by pipe for the top delivery port of sedimentation basin 3
The inlet communication in road and filter 10；Filter 10 is multimedium mechanical filter；Described clear water reserviors 8 are connected with filter 10
Pipeline on clarified water pump 9 is installed；The outlet at bottom of described sedimentation basin 3 is respectively communicated with the water inlet of reaction tank 2 by pipeline
With the import of sludge concentration tank 6.Sludge circulation pump 4 is installed on the pipeline that described sedimentation basin 3 is connected with reaction tank 2, it is described
The pipeline that connects with sludge concentration tank 6 of sedimentation basin 3 on sludge excavationg pump 5 is installed；The bottom of described sludge concentration tank 6 goes out
Sludge pump 7 is installed on mouth pipeline, the outlet of sludge pump 7 is connected by pipeline with sludge dewatering equipment 23, outside the mud cake after dehydration
Fortune landfill disposal.Described sludge dewatering equipment 23 is automatic plate and frame type filter-press.Agitator two is installed in described reaction tank 2
201；Mud scraper 1, the supporting PAC and PAM chemicals dosing plants of sedimentation basin 3 are installed in described sedimentation basin 3；Described sludge is dense
Mud scraper 2 601 is installed in contracting pond 6.
Described nanofiltration separation unit is used to improve the supersaturation concentration of calcium sulfate in water, is allowed to be separated with sodium chloride；Bag
Include nanofiltration device 13；The outlet that the import of described nanofiltration device 13 passes through pipe-and-filter 10, described nanofiltration dress
Put and be provided with the pipeline between 13 and filter 10 cartridge filter 1 and NF high-pressure pumps 12.The film that nanofiltration device 13 is adopted
Component is to Ca2+、Mg2+、SO4 2-Etc. divalence and the high retention of multivalent ion, to Na+、K+、Cl-Deng the special of the low retention of monovalention
Seperation film.The degree of supersaturation for improving calcium sulfate is by adding stabilizer（PT-504）Come what is realized, stabilizer adds concentration
25ppm。
Described reverse osmosis concentration unit is used to concentrate the product water of nanofiltration separation unit, improves the saliferous of this unit concentrated water
Amount；Including the high pressure reverse osmosis unit 18 of DTRO membrane modules；The import of described high pressure reverse osmosis unit 18 passes through pipeline and receives
The side exit connection of filter device 13, installation on pipeline connect between described high pressure reverse osmosis unit 18 and nanofiltration device 13
There are cartridge filter 2 16 and reverse osmosis high-pressure pump 17；The outlet of described high pressure reverse osmosis unit 13 connects with Water circulation pipeline is produced
It is logical.
Described crystal of calcium sulfate unit is used for crystallization and separates out calcium sulphate crystal；Crystal of calcium sulfate is by adding destabilizing agent
Realize, destabilizing agent throwing device is mainly made up of liquor box, agitator, liquid level gauge, measuring pump and annex.Crystal of calcium sulfate list
Unit includes calcium sulphate crystal thickener 14 and link-suspended basket centrifuge 1；The import of described calcium sulphate crystal thickener 14 passes through
Pipeline is connected with the outlet at bottom of nanofiltration device 13, the outlet at bottom of calcium sulphate crystal thickener 14 by pipeline and 3-foot from
Scheming 1 is connected；The top exit of calcium sulphate crystal thickener 14 and the discharge channel of link-suspended basket centrifuge 1 pass through back
The inlet communication in flow tube road and sedimentation basin 3.
Described sodium chloride crystalline element is used for crystallization and separates out calcium sulphate crystal；Including sodium chloride crystal thickener 19, chlorine
Change sodium evaporimeter 20, condenser 21 and link-suspended basket centrifuge 2 22.The top inlet of described sodium chloride crystal thickener 19 is led to
Piping is connected with the outlet at bottom of high pressure reverse osmosis unit 18, the outlet at bottom of sodium chloride crystal thickener 19 by pipeline with
Link-suspended basket centrifuge 2 22 is connected；The upper outlet of sodium chloride crystal thickener 19 is connected by pipeline with sodium chloride evaporimeter 20
It is logical, condenser 21 is installed on the discharge line of sodium chloride evaporimeter 20.
Embodiment 2：
The processing system of the desulfurization wastewater reuse and salt resource includes pretreatment unit, nanofiltration separation unit, reverse osmosis concentration
Unit, crystal of calcium sulfate unit and sodium chloride crystalline element；
Described pretreatment unit is used for heavy metal and suspension, colloid and the partial organic substances gone in eliminating water；Including regulating reservoir
1st, reaction tank 2, sedimentation basin 3, sludge concentration tank 6, sludge dewatering equipment 23, clear water reserviors 8 and filter 10；In described regulating reservoir 1
Agitator 1, the water inlet connection waste pipe of regulating reservoir 1 and sodium hydroxide solution pipeline are installed, by NaOH
Solution adjusts pH value 9-10；The water inlet that the delivery port of regulating reservoir 1 passes through pipeline communication reaction tank 2, the delivery port of reaction tank 2 leads to
Piping connects sedimentation basin 3, and, by pipeline communication clear water reserviors 8, the outlet of clear water reserviors 8 is by pipe for the top delivery port of sedimentation basin 3
The inlet communication in road and filter 10；Filter 10 is micro-filtration filter；The pipeline that described clear water reserviors 8 are connected with filter 10
On clarified water pump 9 is installed；The outlet at bottom of described sedimentation basin 3 is respectively communicated with the water inlet and sludge of reaction tank 2 by pipeline
The import of concentration basin 6.Sludge circulation pump 4, described precipitation are installed on the pipeline that described sedimentation basin 3 is connected with reaction tank 2
Sludge excavationg pump 5 is installed on the pipeline that pond 3 connects with sludge concentration tank 6；The outlet at bottom pipeline of described sludge concentration tank 6
On sludge pump 7 is installed, the outlet of sludge pump 7 is connected by pipeline with sludge dewatering equipment 23, mud cake after dehydration outward transport landfill
Process.Described sludge dewatering equipment 23 is automatic plate and frame type filter-press.Agitator 2 201 is installed in described reaction tank 2；It is described
Sedimentation basin 3 in mud scraper 1, the supporting PAC and PAM chemicals dosing plants of sedimentation basin 3 are installed；In described sludge concentration tank 6
Mud scraper 2 601 is installed.
Described nanofiltration separation unit is used to improve the supersaturation concentration of calcium sulfate in water, is allowed to be separated with sodium chloride；Bag
Include nanofiltration device 13；The outlet that the import of described nanofiltration device 13 passes through pipe-and-filter 10, described nanofiltration dress
Put and be provided with the pipeline between 13 and filter 10 cartridge filter 1 and NF high-pressure pumps 12.The film that nanofiltration device 13 is adopted
Component is to Ca2+、Mg2+、SO4 2-Etc. divalence and the high retention of multivalent ion, to Na+、K+、Cl-Deng the special of the low retention of monovalention
Seperation film.The degree of supersaturation for improving calcium sulfate is by adding stabilizer（PC-2040J）Come what is realized, stabilizer adds concentration
80ppm。
Described reverse osmosis concentration unit is used to concentrate the product water of nanofiltration separation unit, improves the saliferous of this unit concentrated water
Amount；Including the high pressure reverse osmosis unit 18 of STRO membrane modules；The import of described high pressure reverse osmosis unit 18 passes through pipeline and receives
The side exit connection of filter device 13, installation on pipeline connect between described high pressure reverse osmosis unit 18 and nanofiltration device 13
There are cartridge filter 2 16 and reverse osmosis high-pressure pump 17；The outlet of described high pressure reverse osmosis unit 13 connects with Water circulation pipeline is produced
It is logical.
Described crystal of calcium sulfate unit is used for crystallization and separates out calcium sulphate crystal；Crystal of calcium sulfate is by adding destabilizing agent
Realize, destabilizing agent throwing device is mainly made up of liquor box, agitator, liquid level gauge, measuring pump and annex.Crystal of calcium sulfate list
Unit includes calcium sulphate crystal thickener 14 and link-suspended basket centrifuge 1；The import of described calcium sulphate crystal thickener 14 passes through
Pipeline is connected with the outlet at bottom of nanofiltration device 13, the outlet at bottom of calcium sulphate crystal thickener 14 by pipeline and 3-foot from
Scheming 1 is connected；The top exit of calcium sulphate crystal thickener 14 and the discharge channel of link-suspended basket centrifuge 1 pass through back
The inlet communication in flow tube road and sedimentation basin 3.
Described sodium chloride crystalline element is used for crystallization and separates out calcium sulphate crystal；Including sodium chloride crystal thickener 19, chlorine
Change sodium evaporimeter 20, condenser 21 and link-suspended basket centrifuge 2 22.The top inlet of described sodium chloride crystal thickener 19 is led to
Piping is connected with the outlet at bottom of high pressure reverse osmosis unit 18, the outlet at bottom of sodium chloride crystal thickener 19 by pipeline with
Link-suspended basket centrifuge 2 22 is connected；The upper outlet of sodium chloride crystal thickener 19 is connected by pipeline with sodium chloride evaporimeter 20
It is logical, condenser 21 is installed on the discharge line of sodium chloride evaporimeter 20.
Embodiment 3：
The processing system of the desulfurization wastewater reuse and salt resource includes pretreatment unit, nanofiltration separation unit, reverse osmosis concentration
Unit, crystal of calcium sulfate unit and sodium chloride crystalline element；
Described pretreatment unit is used for heavy metal and suspension, colloid and the partial organic substances gone in eliminating water；Including regulating reservoir
1st, reaction tank 2, sedimentation basin 3, sludge concentration tank 6, sludge dewatering equipment 23, clear water reserviors 8 and filter 10；In described regulating reservoir 1
Agitator 1, the water inlet connection waste pipe of regulating reservoir 1 and sodium hydroxide solution pipeline are installed, by NaOH
Solution adjusts pH value 9-10；The water inlet that the delivery port of regulating reservoir 1 passes through pipeline communication reaction tank 2, the delivery port of reaction tank 2 leads to
Piping connects sedimentation basin 3, and, by pipeline communication clear water reserviors 8, the outlet of clear water reserviors 8 is by pipe for the top delivery port of sedimentation basin 3
The inlet communication in road and filter 10；Filter 10 is ultra filtration filter；The pipeline that described clear water reserviors 8 are connected with filter 10
On clarified water pump 9 is installed；The outlet at bottom of described sedimentation basin 3 is respectively communicated with the water inlet and sludge of reaction tank 2 by pipeline
The import of concentration basin 6.Sludge circulation pump 4, described precipitation are installed on the pipeline that described sedimentation basin 3 is connected with reaction tank 2
Sludge excavationg pump 5 is installed on the pipeline that pond 3 connects with sludge concentration tank 6；The outlet at bottom pipeline of described sludge concentration tank 6
On sludge pump 7 is installed, the outlet of sludge pump 7 is connected by pipeline with sludge dewatering equipment 23, mud cake after dehydration outward transport landfill
Process.Described sludge dewatering equipment 23 is automatic plate and frame type filter-press.Agitator 2 201 is installed in described reaction tank 2；It is described
Sedimentation basin 3 in mud scraper 1, the supporting PAC and PAM chemicals dosing plants of sedimentation basin 3 are installed；In described sludge concentration tank 6
Mud scraper 2 601 is installed.
Described nanofiltration separation unit is used to improve the supersaturation concentration of calcium sulfate in water, is allowed to be separated with sodium chloride；Bag
Include nanofiltration device 13；The outlet that the import of described nanofiltration device 13 passes through pipe-and-filter 10, described nanofiltration dress
Put and be provided with the pipeline between 13 and filter 10 cartridge filter 1 and NF high-pressure pumps 12.The film that nanofiltration device 13 is adopted
Component is to Ca2+、Mg2+、SO4 2-Etc. divalence and the high retention of multivalent ion, to Na+、K+、Cl-Deng the special of the low retention of monovalention
Seperation film.The degree of supersaturation for improving calcium sulfate is by adding stabilizer（PT-504）Come what is realized, stabilizer adds concentration
150ppm。
Described reverse osmosis concentration unit is used to concentrate the product water of nanofiltration separation unit, improves the saliferous of this unit concentrated water
Amount；Including the high pressure reverse osmosis unit 18 of high pressure rolled membrane module；The import of described high pressure reverse osmosis unit 18 passes through pipeline
Connect with the side exit of nanofiltration device 13, on the pipeline connected between described high pressure reverse osmosis unit 18 and nanofiltration device 13
Cartridge filter 2 16 and reverse osmosis high-pressure pump 17 are installed；The outlet of described high pressure reverse osmosis unit 13 and product Water circulation pipe
Road is connected.
Described crystal of calcium sulfate unit is used for crystallization and separates out calcium sulphate crystal；Crystal of calcium sulfate is by adding destabilizing agent
Realize, destabilizing agent throwing device is mainly made up of liquor box, agitator, liquid level gauge, measuring pump and annex.Crystal of calcium sulfate list
Unit includes calcium sulphate crystal thickener 14 and link-suspended basket centrifuge 1；The import of described calcium sulphate crystal thickener 14 passes through
Pipeline is connected with the outlet at bottom of nanofiltration device 13, the outlet at bottom of calcium sulphate crystal thickener 14 by pipeline and 3-foot from
Scheming 1 is connected；The top exit of calcium sulphate crystal thickener 14 and the discharge channel of link-suspended basket centrifuge 1 pass through back
The inlet communication in flow tube road and sedimentation basin 3.
Described sodium chloride crystalline element is used for crystallization and separates out calcium sulphate crystal；Including sodium chloride crystal thickener 19, chlorine
Change sodium evaporimeter 20, condenser 21 and link-suspended basket centrifuge 2 22.The top inlet of described sodium chloride crystal thickener 19 is led to
Piping is connected with the outlet at bottom of high pressure reverse osmosis unit 18, the outlet at bottom of sodium chloride crystal thickener 19 by pipeline with
Link-suspended basket centrifuge 2 22 is connected；The upper outlet of sodium chloride crystal thickener 19 is connected by pipeline with sodium chloride evaporimeter 20
It is logical, condenser 21 is installed on the discharge line of sodium chloride evaporimeter 20.
When the processing system of the desulfurization wastewater reuse and salt resource is run, desulfurization waste liquor Jing adds NaOH to adjust
Regulating reservoir 1 is entered after PH9-10, then gravity flow enters reaction tank 2, organic sulfur and PAC are added before into reaction tank 2, in precipitation
Heavy metal ion in the inner water in pond 3 is separated out with organic reaction of Salmon-Saxl, and floccule is formed in the presence of PAC.The water outlet of reaction tank 2 adds
Enter and enter after flocculation aid PAM sedimentation basin 3, the water outlet of sedimentation basin 3 gravity flow enters clear water reserviors 8, Jing clarified water pumps 9 lift acid adding and adjust PH6-
Filter 10 is entered after 7, the water outlet of filter 10 is added and enter after stabilizer cartridge filter 1, the water outlet of cartridge filter 1
Nanofiltration device 13 is entered into NF high-pressure pumps 12.90% water becomes main sodium chloride-containing through NF membrane in nanofiltration device 13
Nanofiltration produce water；10% water retention is main sulfur acid calcium and the nanofiltration concentrated water of sodium sulphate.Concentrated water Jing of nanofiltration device 13 adds brokenly surely
The suspension of calcium sulfate is formed after agent, Jing after calcium sulphate crystal thickener 14 is concentrated centrifuge 1 is entered, centrifugation goes out sulphur
Sour calcium crystal, centrifugation liquid and the supernatant of calcium sulphate crystal thickener 14 are back to sedimentation basin 3.Nanofiltration device 13 is produced water and is entered
Enter cartridge filter 2 16 and then Jing reverse osmosis high-pressures pump 17 and enter high pressure reverse osmosis unit 18, it is concentrated after sodium chloride-containing it is dense
Water enters sodium chloride evaporimeter 20, and the suspension for being concentrated by evaporation the sodium chloride-containing crystal for obtaining enters sodium chloride crystal thickener
19, it is concentrated rear into centrifuge 2 22, it is centrifugally separating to obtain crystal sodium chloride.The supernatant of sodium chloride crystal thickener 19 and from
The separating liquid of scheming 2 22 returns to reuse after the condensed device 21 of the steam of sodium chloride evaporimeter 20 is condensed, high pressure reverse osmosis unit 18
Produce Water circulation.
The a part of Jing sludge circulation pumps 4 of sludge that sedimentation basin 3 is produced are circulated, and a part of Jing sludge excavationg pump 5 drains into sludge
Concentration basin 6, the sludge Jing sludge pumps 7 after concentration are sent into sludge dewatering equipment 23 and are dehydrated, the mud cake outward transport landfill disposal after dehydration.It is dirty
The water outlet of mud dewaterer and the overflow water of sludge concentration tank 6 are back to reaction tank 2 and reprocess.
By specific embodiment above, the those skilled in the art can readily realize the present invention.But should
Work as understanding, the present invention is not limited to above-mentioned several specific embodiments.On the basis of disclosed embodiment, the technology
The technical staff in field can be combined different technical characteristics, so as to realize different technical schemes.
Claims (10)
1. the processing system of a kind of desulfurization wastewater reuse and salt resource, it is characterised in that desulfurization wastewater reuse and salt resource
Processing system include pretreatment unit, nanofiltration separation unit, reverse osmosis concentration unit, crystal of calcium sulfate unit and sodium chloride
Crystalline element；
Described pretreatment unit is used for heavy metal and suspension, colloid and the partial organic substances gone in eliminating water；Including regulating reservoir,
Reaction tank, sedimentation basin, sludge concentration tank, sludge dewatering equipment, clear water reserviors and filter；
Described nanofiltration separation unit is used to improve the supersaturation concentration of calcium sulfate in water, is allowed to be separated with sodium chloride；Including receiving
Filter device；
Described reverse osmosis concentration unit is used to concentrate the product water of nanofiltration separation unit, improves the salt content of this unit concentrated water；Bag
Include high pressure reverse osmosis unit；
Described crystal of calcium sulfate unit is used for crystallization and separates out calcium sulphate crystal；Including calcium sulphate crystal thickener and centrifuge
One；
Described sodium chloride crystalline element is used for crystallization and separates out calcium sulphate crystal；Steam including sodium chloride crystal thickener, sodium chloride
Send out device, condenser and centrifuge two.
2. the processing system of a kind of desulfurization wastewater reuse according to claim 1 and salt resource, it is characterised in that described
Pretreatment unit in regulating reservoir in agitator one is installed, the water inlet connection waste pipe of regulating reservoir and NaOH are molten
Liquid pipe road, the delivery port of regulating reservoir passes through the water inlet of pipeline communication reaction tank, and the delivery port of reaction tank is heavy by pipeline communication
Shallow lake pond, the top delivery port of sedimentation basin by pipeline communication clear water reserviors, the import that the outlet of clear water reserviors passes through pipe-and-filter
Connection；The outlet at bottom of described sedimentation basin is respectively communicated with the water inlet of reaction tank and the import of sludge concentration tank by pipeline.
3. the processing system of a kind of desulfurization wastewater reuse according to claim 1 and 2 and salt resource, it is characterised in that
Agitator two is installed in described reaction tank；Mud scraper one is installed in described sedimentation basin；Peace in described sludge concentration tank
Equipped with mud scraper two.
4. the processing system of a kind of desulfurization wastewater reuse according to claim 2 and salt resource, it is characterised in that described
The pipeline that connects with reaction tank of sedimentation basin on sludge circulation pump, the pipe that described sedimentation basin is connected with sludge concentration tank are installed
Sludge excavationg pump is installed on road；Sludge pump is installed, sludge pump goes out on the outlet at bottom pipeline of described sludge concentration tank
Mouth is connected by pipeline with sludge dewatering equipment；Clarified water pump is installed on the pipeline that described clear water reserviors are connected with filter.
5. the processing system of a kind of desulfurization wastewater reuse according to claim 1 and salt resource, it is characterised in that described
Nanofiltration separation unit in nanofiltration device the import outlet that passes through pipe-and-filter, described nanofiltration device and mistake
Cartridge filter one and NF high-pressure pumps are installed on the pipeline between filter.
6. the processing system of a kind of desulfurization wastewater reuse according to claim 1 and salt resource, it is characterised in that described
Reverse osmosis concentration unit in the import of high pressure reverse osmosis unit connected with the side exit of nanofiltration device by pipeline, it is described
High pressure reverse osmosis unit and nanofiltration device between cartridge filter two and reverse osmosis high-pressure pump are installed on the pipeline that connects；Institute
The outlet of the high pressure reverse osmosis unit stated is connected with Water circulation pipeline is produced.
7. a kind of desulfurization wastewater reuse according to claim 1 or 6 and the processing system of salt resource, it is characterised in that
Described high pressure reverse osmosis unit is DTRO membrane modules, STRO membrane modules or high pressure rolled membrane module.
8. the processing system of a kind of desulfurization wastewater reuse according to claim 1 and salt resource, it is characterised in that described
Crystal of calcium sulfate unit in the import of calcium sulphate crystal thickener connected with the outlet at bottom of nanofiltration device by pipeline, sulfuric acid
The outlet at bottom of calcium crystal thickener is connected by pipeline with centrifuge one；The top exit of calcium sulphate crystal thickener and centrifugation
The discharge channel of machine one is by reflux line and the inlet communication of sedimentation basin.
9. the processing system of a kind of desulfurization wastewater reuse according to claim 1 and salt resource, it is characterised in that described
Sodium chloride crystalline element in sodium chloride crystal thickener the top inlet bottom that passes through pipeline and high pressure reverse osmosis unit
Outlet, the outlet at bottom of sodium chloride crystal thickener is connected by pipeline with centrifuge two；Sodium chloride crystal thickener
Upper outlet is connected by pipeline with sodium chloride evaporimeter, and on the discharge line of sodium chloride evaporimeter condenser is provided with.
10. the processing system of a kind of desulfurization wastewater reuse according to claim 1 and salt resource, it is characterised in that institute
The centrifuge one stated and centrifuge two are link-suspended basket centrifuge.
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| CN201611225407.XA CN106630352A (en) | 2016-12-27 | 2016-12-27 | Desulfurization waste water recycling and salt recycling treatment system |
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| CN201611225407.XA CN106630352A (en) | 2016-12-27 | 2016-12-27 | Desulfurization waste water recycling and salt recycling treatment system |
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| CN109592816A (en) * | 2018-12-16 | 2019-04-09 | 金科环境股份有限公司 | Eliminate the device and method of reverse osmosis concentrated water permanent hardness and temporary hardness |
| CN111039453A (en) * | 2019-12-23 | 2020-04-21 | 烟台金正环保科技有限公司 | System and method for treating wastewater containing high-concentration calcium sulfate |
| WO2020125096A1 (en) * | 2018-12-16 | 2020-06-25 | 金科环境股份有限公司 | Treatment system for reverse osmosis concentrated water having high permanent hardness |
| CN112408646A (en) * | 2020-11-22 | 2021-02-26 | 山东奥美环境股份有限公司 | Sodium sulfate-containing wastewater treatment device and application method thereof |
| CN112591971A (en) * | 2020-11-22 | 2021-04-02 | 山东奥美环境股份有限公司 | Hydrochloric acid pickling effluent disposal system |
| US11046593B2 (en) | 2018-12-16 | 2021-06-29 | Greentech Environment Co., Ltd. | System for treating reverse-osmosis concentrated water with permanent hardness |
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| WO2010028196A1 (en) * | 2008-09-04 | 2010-03-11 | Nalco Company | Method for inhibiting scale formation and deposition in membrane systems via the use of an aa - amps copolymer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109592816A (en) * | 2018-12-16 | 2019-04-09 | 金科环境股份有限公司 | Eliminate the device and method of reverse osmosis concentrated water permanent hardness and temporary hardness |
| WO2020125096A1 (en) * | 2018-12-16 | 2020-06-25 | 金科环境股份有限公司 | Treatment system for reverse osmosis concentrated water having high permanent hardness |
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| CN111039453A (en) * | 2019-12-23 | 2020-04-21 | 烟台金正环保科技有限公司 | System and method for treating wastewater containing high-concentration calcium sulfate |
| CN112408646A (en) * | 2020-11-22 | 2021-02-26 | 山东奥美环境股份有限公司 | Sodium sulfate-containing wastewater treatment device and application method thereof |
| CN112591971A (en) * | 2020-11-22 | 2021-04-02 | 山东奥美环境股份有限公司 | Hydrochloric acid pickling effluent disposal system |
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