CN205856230U - A kind of system reclaiming sodium chloride from high slat-containing wastewater - Google Patents
A kind of system reclaiming sodium chloride from high slat-containing wastewater Download PDFInfo
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- CN205856230U CN205856230U CN201620557879.4U CN201620557879U CN205856230U CN 205856230 U CN205856230 U CN 205856230U CN 201620557879 U CN201620557879 U CN 201620557879U CN 205856230 U CN205856230 U CN 205856230U
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Abstract
This utility model relates to a kind of system reclaiming sodium chloride from high slat-containing wastewater, specifically by clean unit, nano-filtration unit, minimizing unit, and evaporative crystallization unit forms.High slat-containing wastewater removes easily scale forming matter and the COD type organic such as deliming, magnesium, silicon oxide through clean unit, separate subsequently into nano-filtration unit and produce one monovalent ion clear liquid and another strand of dope, dope is back to clean unit, monovalent ion clear liquid enters minimizing unit and concentrates further, produce recycle-water reuse, gained concentrated solution enters evaporative crystallization unit and is evaporated crystallization isolated industrial chlorinations sodium, and recycling condensing water, a small amount of mother solution of outer row is back to clean unit.This utility model achieves sodium chloride and other inorganic salts in high slat-containing wastewater and efficiently separates and reclaim, and the recycle-water simultaneously obtained fully meets reuse.
Description
Technical field
This utility model relates to a kind of high slat-containing wastewater processing system, is specifically related to a kind of recovery chlorine from high slat-containing wastewater
Change the system of sodium.
Background technology
From the high strong brine of the industry discharges such as petrochemical industry, Coal Chemical Industry, power plant, oilfield exploitation through evaporative crystallization zero-emission
During process, the carnallite finally obtained carries out landfill disposal generally as solid waste, has certain risk of environmental pollution, and returns
Receive utilization rate the highest.
In order to improve the sewage disposal later stage, the classification recycling of carnallite, is the development trend of high-salt sewage process, will
Above-mentioned high strong brine evaporative crystallization zero discharge treatment, and during the course the higher sodium chloride of value is separated and recovered, obtain
Meet the sodium chloride of industrial level, while solving solid waste disposal, obtain economic benefit, reduce high slat-containing wastewater zero-emission
The operating cost put, plays an important role to the large-scale application of wastewater zero discharge.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of from high slat-containing wastewater for above-mentioned prior art
Reclaim the system of sodium chloride.
The technical scheme in the invention for solving the above technical problem is: a kind of recovery sodium chloride from high slat-containing wastewater
System, including set gradually
Clean unit: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in high slat-containing wastewater；
Nano-filtration unit: purify high slat-containing wastewater, obtain monovalent ion clear liquid and dope, dope purifies single through loop foldback
Unit；
Minimizing unit: concentrate monovalent ion clear liquid to concentrated solution, producing can the recycle-water of reuse；
Evaporative crystallization unit: to concentrated solution evaporative crystallization isolated industrial chlorinations sodium, recycling condensing water, outer row's is a small amount of
Mother solution is back to clean unit.
Preferably, described minimizing unit is the disc tube reverse osmosis (dt-ro) DTRO used, or pole-reversing electroosmosis EDR, or aforementioned
The combination of upgrading unit.
Preferably, described evaporative crystallization unit is to use the outer crystalline texture for steam, or the crystallization of mechanical vapor-compression
Structure, crystallizer uses forced circulation crystallizer, or draft tube baffle crystallizer.
Based on the above-mentioned method reclaiming sodium chloride system from high slat-containing wastewater, including following operation,
Purify: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in high slat-containing wastewater；
Nanofiltration: it is dense with another strand that high slat-containing wastewater produces one monovalent ion clear liquid by nanofiltration separation after purifying
Liquid, dope is back to cleaning procedure；
Minimizing: the monovalent ion clear liquid obtaining nanofiltration separation concentrates, be concentrated into TDS reach 90000mg/L with
On concentrated solution, gained clear liquid is as recycle-water reuse；
Evaporative crystallization: to concentrated solution evaporative crystallization isolated industrial chlorinations sodium, recycling condensing water, a small amount of mother solution of outer row returns
It is back to cleaning procedure.
Preferably, cleaning procedure uses Calx+soda, or Caustic soda+soda, or Calx+flue gas, or calcium chloride+soda,
Or aforementioned any one combination with activated carbon removes the easy scale forming matter of the calcium in high slat-containing wastewater, magnesium and silicon oxide, with much money
Belonging to material and COD type organic, then use micro-filtrate membrane filtration separation brine sludge and clear liquid, clear liquid enters next step nanofiltration operation.
Preferably, minimizing is through disc tube reverse osmosis (dt-ro) DTRO, or pole-reversing electroosmosis EDR, or aforementioned upgrading unit
Combination concentration.
Further, evaporative crystallization unit uses the outer crystallization mode for steam, or mechanical vapor-compression crystallization mode, knot
Brilliant device uses forced circulation crystallizer, or draft tube baffle crystallizer.
Compared with prior art, the utility model has the advantage of: sodium chloride in high slat-containing wastewater and other inorganic salts
Efficiently separating and reclaim, the recycle-water obtained during concurrently separating fully meets reuse requirement.Solving at solid waste
Obtain economic benefit while putting, reduce the operating cost of high slat-containing wastewater zero-emission, on a large scale should for wastewater zero discharge
With having dissemination.
Accompanying drawing explanation
Fig. 1 is the structural representation reclaiming sodium chloride system in this utility model embodiment from high slat-containing wastewater.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.
As it is shown in figure 1, the system reclaiming sodium chloride from high slat-containing wastewater in the present embodiment, specifically by clean unit,
Nano-filtration unit, minimizing unit, evaporative crystallization unit forms.High slat-containing wastewater removes deliming, magnesium, silicon oxide etc. through clean unit
Easily scale forming matter and COD type organic, separates subsequently into nano-filtration unit and produces one monovalent ion clear liquid and another strand of dope,
Dope is back to clean unit, and monovalent ion clear liquid enters minimizing unit and concentrates further, produces recycle-water reuse, and gained is dense
Contracting liquid enters evaporative crystallization unit and is evaporated crystallization isolated industrial chlorinations sodium, recycling condensing water, a small amount of mother solution of outer row
It is back to clean unit.
The disc tube reverse osmosis (dt-ro) DTRO that minimizing unit can use, or pole-reversing electroosmosis EDR, or aforementioned upgrading unit
Combination.
Evaporative crystallization unit can use the outer crystalline texture for steam, or the crystalline texture of mechanical vapor-compression, crystallization
Device uses forced circulation crystallizer, or draft tube baffle crystallizer.
Embodiment 1
The method reclaiming sodium chloride from high slat-containing wastewater based on said system, arranges saliferous and gives up outside certain Coal Chemical Industry reverse osmosis
Water TDS is 25000 mg/L, and this waste water is after calcium chloride+soda+active carbon purifying, and the clear liquid that solid-liquid separation obtains enters and receives
Filter unit isolates one monovalent ion clear liquid and one dope, and the TDS of monovalent ion clear liquid is 10000 mg/L and dope
TDS is 40000 mg/L, and dope is back to clean unit, and clear liquid entrance minimizing DTRO unit is concentrated into TDS and reaches 90000
The concentrated solution of mg/L, gained recycle-water reuse；Dope enters evaporative crystallization unit, and Crystallization Separation goes out to meet GB/T 5462-2003
The sodium chloride of II grade standard, Condensate reuse.
Embodiment 2
The method reclaiming sodium chloride from high slat-containing wastewater based on said system, arranges saliferous and gives up outside certain Coal Chemical Industry reverse osmosis
Water TDS is 30000 mg/L, and this waste water is after Calx+stack gas cleaning, and the clear liquid that solid-liquid separation obtains enters nano-filtration unit
Isolating one monovalent ion clear liquid and one dope, the TDS of monovalent ion clear liquid is that the TDS of 15000 mg/L and dope is
50000 mg/L, dope is back to clean unit, and clear liquid enters minimizing DTRO unit and is concentrated into TDS is 120000 mg/L's
Concentrated solution, gained recycle-water reuse；Dope enters evaporative crystallization unit, and Crystallization Separation goes out to meet GB/T 5462-2003 II grade mark
Accurate sodium chloride, Condensate reuse.
In addition to the implementation, this utility model also includes other embodiments, all employing equivalents or equivalence
The technical scheme that substitute mode is formed, within all should falling into this utility model scope of the claims.
Claims (3)
1. the system reclaiming sodium chloride from high slat-containing wastewater, it is characterised in that: include setting gradually
Clean unit: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in high slat-containing wastewater；
Nano-filtration unit: purifying high slat-containing wastewater, obtain monovalent ion clear liquid and dope, dope is through loop foldback clean unit；
Minimizing unit: concentrate monovalent ion clear liquid to concentrated solution, producing can the recycle-water of reuse；
Evaporative crystallization unit: to concentrated solution evaporative crystallization isolated industrial chlorinations sodium, recycling condensing water, a small amount of mother solution of outer row
It is back to clean unit.
The system reclaiming sodium chloride from high slat-containing wastewater the most according to claim 1, it is characterised in that: described minimizing
Unit is the disc tube reverse osmosis (dt-ro) DTRO used, or pole-reversing electroosmosis EDR, or the combination of aforementioned upgrading unit.
The system reclaiming sodium chloride from high slat-containing wastewater the most according to claim 1, it is characterised in that: described evaporation knot
Brilliant unit is to use the outer crystalline texture for steam, or the crystalline texture of mechanical vapor-compression, and crystallizer uses forced circulation knot
Brilliant device, or draft tube baffle crystallizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620557879.4U CN205856230U (en) | 2016-06-12 | 2016-06-12 | A kind of system reclaiming sodium chloride from high slat-containing wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620557879.4U CN205856230U (en) | 2016-06-12 | 2016-06-12 | A kind of system reclaiming sodium chloride from high slat-containing wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906128A (en) * | 2016-06-12 | 2016-08-31 | 双良节能系统股份有限公司 | Method and system for recovering sodium chloride from high salinity wastewater |
| CN108083567A (en) * | 2017-12-18 | 2018-05-29 | 自贡市轻工业设计研究院有限责任公司 | A kind of sulfur-containing gas exploit sewage water treatment method |
-
2016
- 2016-06-12 CN CN201620557879.4U patent/CN205856230U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906128A (en) * | 2016-06-12 | 2016-08-31 | 双良节能系统股份有限公司 | Method and system for recovering sodium chloride from high salinity wastewater |
| CN108083567A (en) * | 2017-12-18 | 2018-05-29 | 自贡市轻工业设计研究院有限责任公司 | A kind of sulfur-containing gas exploit sewage water treatment method |
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