CN205856229U - A kind of desulfurization wastewater near-zero release processing system - Google Patents
A kind of desulfurization wastewater near-zero release processing system Download PDFInfo
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- CN205856229U CN205856229U CN201620557874.1U CN201620557874U CN205856229U CN 205856229 U CN205856229 U CN 205856229U CN 201620557874 U CN201620557874 U CN 201620557874U CN 205856229 U CN205856229 U CN 205856229U
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Abstract
This utility model relates to desulfurization wastewater near-zero release processing system, and desulfurization wastewater first passes around clean unit, removes the easily Organic substance such as scale forming matter and COD such as deliming, magnesium, silicon oxide, filters isolated brine sludge；The filtrate obtained enters minimizing unit, and minimizing unit uses EDR or DTRO to concentrate further, is recycled Water circulation, and a dope part is back to clean unit, is partly into denitration unit；The precipitation micro-filtrate membrane filtration that denitration unit process produces, clear liquid enters evaporative crystallization unit, and evaporative crystallization isolated technical grade sodium chloride, recycling condensing water, a small amount of crystalline mother solution of outer row is back to clean unit and denitration unit.Achieving and sodium chloride in desulfurization wastewater and other inorganic salts are efficiently separated and reclaimed, the recycle-water simultaneously obtained fully meets reuse requirement, and the response rate is high.
Description
Technical field
This utility model relates to desulfurization wastewater processing technology field, and be specifically related to a kind of desulfurization wastewater near-zero release is
System.
Background technology
The waste water using wet gypsum method desulfurization to produce contains substantial amounts of chloride ion, sulfate radical, calcium, magnesium plasma, dissolves
Property solid is between 10000～40000 mg/L.If this kind of waste water is without processing and outer row further, it will to ring
Border produces harm.
Recycling further to desulfurization wastewater, and during the course the higher sodium chloride of value is separated and recovered,
To meeting the sodium chloride of industrial level, not only help solution environmental problem and have also obtained economic benefit, zero-emission near to desulfurization wastewater
The large-scale application put plays an important role, and is the directions that are continually striving to of those skilled in the art.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of nearly zero-emission of desulfurization wastewater for above-mentioned prior art
Put processing system.
The technical scheme in the invention for solving the above technical problem is: a kind of desulfurization wastewater near-zero release processes system
System, including set gradually
Clean unit: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in desulfurization wastewater；
Minimizing unit: concentrate further desulfurization wastewater to concentrated solution, produce can the recycle-water of reuse, a concentrated solution part
Returning clean unit, another part enters denitration unit；
Denitration unit: the sulfate radical in precipitation waste water, filters and separates, clear liquid devaporation crystalline element；
Evaporative crystallization unit: to concentrating clear liquid evaporative crystallization isolated industrial chlorinations sodium, condensed fluid returns as recycle-water
With, a small amount of mother solution of outer row is back to clean unit and denitration unit.
Preferably, described minimizing unit is to use pole-reversing electroosmosis EDR, or disc tube reverse osmosis (dt-ro) DTRO, or aforementioned dense
The combination of contracting unit.
Preferably, described evaporative crystallization unit is to use the outer crystallization mechanism for steam, or the crystallization of mechanical vapor-compression
Mechanism, crystallizer uses forced circulation crystallizer, or draft tube baffle crystallizer.
Desulfurization wastewater near-zero release processing method based on said system, including following operation,
Purify: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in desulfurization wastewater；
Minimizing: concentrate desulfurization wastewater further to concentrated solution, it is thus achieved that TDS reaches the concentrated solution of more than 90000mg/L, dense
A contracting liquid part returns clean unit, and another part enters denitration unit, the recycle-water reuse of gained；
Denitration: the sulfate radical in precipitation waste water, filters and separates, clear liquid devaporation crystalline element；
Evaporative crystallization: to concentrated solution evaporative crystallization isolated industrial chlorinations sodium, condensed fluid is as recycle-water reuse, outer row
A small amount of mother solution be back to purify and denitration operation.
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 desulfurization wastewater, magnesium and silicon oxide, heavy metal
Material and COD type organic, then use micro-filtrate membrane filtration separation brine sludge and clear liquid, and clear liquid enters next step minimizing operation.
Preferably, minimizing is through disc tube reverse osmosis (dt-ro) DTRO, or pole-reversing electroosmosis EDR, or aforementioned upgrading unit
Combination concentration.
Preferably, denitration uses calcium method denitration, and calcium chloride and sulfate radical react generation Gypsum Fibrosum, and use micro-filtration membrane to carry out
Filter, clear liquid devaporation Crystallization Procedure.
Preferably, evaporative crystallization unit uses the outer crystallization mode for steam, or mechanical vapor-compression crystallization mode, crystallization
Device uses forced circulation crystallizer, or draft tube baffle crystallizer.
Compared with prior art, the utility model has the advantage of: the sodium chloride in desulfurization wastewater and other inorganic salts
Efficiently separating and reclaim, the recycle-water obtained during concurrently separating fully meets reuse requirement.Solving environmental problem
Obtain economic benefit simultaneously, reduce the operating cost of desulfurization wastewater zero discharge treatment.
Accompanying drawing explanation
Fig. 1 is the structural representation of desulfurization wastewater near-zero release processing system in this utility model embodiment.
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 desulfurization wastewater near-zero release processing system in the present embodiment, including the purification list set gradually
Unit: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in desulfurization wastewater；Minimizing unit: concentrate de-further
Sulfur waste water to concentrated solution, produce can the recycle-water of reuse, a concentrated solution part returns clean unit, and another part enters denitration list
Unit；Denitration unit: the sulfate radical in precipitation waste water, filters and separates, clear liquid devaporation crystalline element；Evaporative crystallization unit: to dense
Contracting clear liquid evaporative crystallization isolated industrial chlorinations sodium, condensed fluid is back to as recycle-water reuse, a small amount of mother solution of outer row only
Change unit and denitration unit.
Minimizing unit is to use pole-reversing electroosmosis EDR, or disc tube reverse osmosis (dt-ro) DTRO, or the group of aforementioned upgrading unit
Close.
Evaporative crystallization unit is to use the outer crystallization mechanism for steam, or the crystallization mechanism of mechanical vapor-compression, crystallizer
Use forced circulation crystallizer, or draft tube baffle crystallizer.
Desulfurization wastewater near-zero release processing method based on said system
Embodiment 1
Certain power plant desulfurization waste water TDS is 20000 mg/L, and this waste water, after Calx+flue gas+active carbon purifying, enters
It is 120000 mg/L that minimizing EDR unit is concentrated into TDS further, and dope 10% is back to clean unit, and 90% enters denitration list
Unit, dope reacts generation precipitation in denitration unit with calcium chloride, and after the organic micro-filtrate membrane filtration of tubular type, gained clear liquid enters and steams
Send out crystalline element, separate and be dried to obtain sodium chloride, Condensate reuse.Through said system, can produce and meet GB/T
The sodium chloride of 5462-2003 II grade standard, Water Sproading rate reaches 97%.
Embodiment 2
Certain power plant desulfurization waste water TDS is 30000 mg/L, and this waste water, after Caustic soda+soda purifies, enters minimizing
It is 100000 mg/L that DTRO unit is concentrated into TDS further, clear liquid reuse, and dope 20% is back to clean unit, and 80% entrance is de-
Nitre unit, dope reacts generation precipitation in denitration unit with calcium chloride, after ceramic micro filter membrane filtration, enters evaporative crystallization list
Unit, crystallization obtains sodium chloride, Condensate reuse.Through said system, can produce and meet GB/T 5462-2003 II grade mark
Accurate sodium chloride, Water Sproading rate reaches 96%.
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. a desulfurization wastewater near-zero release processing system, 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 desulfurization wastewater；
Minimizing unit: concentrate further desulfurization wastewater to concentrated solution, produce can the recycle-water of reuse, a concentrated solution part returns
Clean unit, another part enters denitration unit；
Denitration unit: the sulfate radical in precipitation waste water, filters and separates, clear liquid devaporation crystalline element；
Evaporative crystallization unit: to concentrating clear liquid evaporative crystallization isolated industrial chlorinations sodium, condensed fluid is as recycle-water reuse, outward
A small amount of mother solution of row is back to clean unit and denitration unit.
Desulfurization wastewater near-zero release processing system the most according to claim 1, it is characterised in that: described minimizing unit is
Use pole-reversing electroosmosis EDR, or disc tube reverse osmosis (dt-ro) DTRO, or the combination of aforementioned upgrading unit.
Desulfurization wastewater near-zero release processing system the most according to claim 1, it is characterised in that: described evaporative crystallization unit
It is to use the outer crystallization mechanism for steam, or the crystallization mechanism of mechanical vapor-compression, crystallizer uses forced circulation crystallizer, or
Draft tube baffle crystallizer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620557874.1U CN205856229U (en) | 2016-06-12 | 2016-06-12 | A kind of desulfurization wastewater near-zero release processing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620557874.1U CN205856229U (en) | 2016-06-12 | 2016-06-12 | A kind of desulfurization wastewater near-zero release processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906127A (en) * | 2016-06-12 | 2016-08-31 | 双良节能系统股份有限公司 | Desulfurization wastewater near-zero release treatment system and method |
-
2016
- 2016-06-12 CN CN201620557874.1U patent/CN205856229U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906127A (en) * | 2016-06-12 | 2016-08-31 | 双良节能系统股份有限公司 | Desulfurization wastewater near-zero release treatment system and method |
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