CN106698760A - Smelting wastewater cyclic utilization system and method - Google Patents
Smelting wastewater cyclic utilization system and method Download PDFInfo
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- CN106698760A CN106698760A CN201610974061.7A CN201610974061A CN106698760A CN 106698760 A CN106698760 A CN 106698760A CN 201610974061 A CN201610974061 A CN 201610974061A CN 106698760 A CN106698760 A CN 106698760A
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- 238000003723 Smelting Methods 0.000 title claims abstract description 50
- 239000002351 wastewater Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 38
- 125000004122 cyclic group Chemical group 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 238000000909 electrodialysis Methods 0.000 claims abstract description 63
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 32
- 239000012528 membrane Substances 0.000 claims abstract description 31
- 238000005342 ion exchange Methods 0.000 claims abstract description 24
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 239000010802 sludge Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 238000010992 reflux Methods 0.000 claims abstract description 4
- 238000001764 infiltration Methods 0.000 claims description 31
- 238000000502 dialysis Methods 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 13
- 239000003513 alkali Substances 0.000 claims description 13
- 229920001429 chelating resin Polymers 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 239000000047 product Substances 0.000 claims description 10
- 239000000701 coagulant Substances 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 6
- 239000012141 concentrate Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000013505 freshwater Substances 0.000 claims description 6
- 239000012266 salt solution Substances 0.000 claims description 5
- 238000005272 metallurgy Methods 0.000 claims description 4
- 238000006386 neutralization reaction Methods 0.000 claims description 4
- 238000007781 pre-processing Methods 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 241001062472 Stokellia anisodon Species 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 230000003472 neutralizing effect Effects 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000009287 sand filtration Methods 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 claims 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 1
- 150000007516 brønsted-lowry acids Chemical class 0.000 description 1
- 150000007528 brønsted-lowry bases Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a smelting wastewater cyclic utilization system which comprises a pretreatment device, an ion exchange system, an ultrafiltration membrane system, a reverse osmosis system, an electrodialysis system, a chelated resin system and a bipolar membrane electrodialysis system, wherein a supernate outlet of the pretreatment device is connected with an ion exchange system; a sludge outlet is connected with a smelting system; a produced water outlet of the ion exchange system is connected with the ultrafiltration membrane system; a regenerated wastewater outlet is connected with a water inlet of the pretreatment device; a water production opening of the ultrafiltration membrane system is connected with the reverse osmosis system; a concentrated water outlet of the reverse osmosis system is connected with the electrodialysis system; a concentrated water outlet of the electrodialysis system is connected with the chelated resin system; a water production opening of the electrodialysis system is connected with a water inlet of the reverse osmosis system through a reflux pipeline; the chelated resin system is connected with the bipolar membrane electrodialysis system. The invention further discloses a smelting wastewater cyclic utilization method. The system and the method which are disclosed by the invention can effectively recycle valued metals and water resources.
Description
Technical field
The present invention relates to smelting wastewater process field, more particularly to a kind of smelting wastewater cyclic utilization system and method.
Background technology
Metallurgy is exactly that metalliferous mineral raw material uses pyrogenic process or hydrometallurgy, separates impurity by various methods, extracts metal
And its process of compound.Smelting process will produce various acid waste liquids, electrolysis waste solution, washings etc. to contain heavy metal and inorganic
The production waste water of salt.
Conventional smelting wastewater processing method is processed by physicochemical techniques such as neutralization, coagulant precipitations at present, and using anti-
The technologies such as infiltration, multiple-effect evaporation, MVR realize zero-emission (as shown in Figure 1), and the technique can return most of heavy metal in water body
Receive, water resource is recycled, but above method energy consumption and operating cost are higher, while producing the substantial amounts of inorganic salts cannot to circulate profit
With, another dangerous waste will be changed into after accumulation is stored up for a long time, environmental pollution causes a hidden trouble.
The content of the invention
For above-mentioned technical problem, smelting wastewater zero-emission can be realized it is an object of the invention to provide one kind, reached
The environmental protection standard of water resource no pollution, while turning waste into wealth, bronsted lowry acids and bases bronsted lowry is prepared into for the smelting of industrial production application by salt
Refining wastewater recycling system and method.
To reach above-mentioned purpose, technical scheme proposed by the present invention is：A kind of smelting wastewater cyclic utilization system, its feature
It is：Including pretreatment unit, ion exchange system, ultrafiltration membrane system, counter-infiltration system, electrodialysis system, chelating resin system
System and bipolar membrane electrodialysis system；The supernatant outlet connection ion exchange system of described pretreatment unit, sludge outlet connects
Connect smelting system；The product water out connection ultrafiltration membrane system of described ion exchange system, regenerative wastewater outlet connection pretreatment
The water inlet of device；The product mouth of a river connection counter-infiltration system of described ultrafiltration membrane system；The concentrated water of described counter-infiltration system goes out
Mouth connection electrodialysis system, the concentrated water outlet of described electrodialysis system connects chelating resin system, the product water of electrodialysis system
Mouth connects the water inlet of counter-infiltration system by reflux line；Described chelating resin system connection bipolar membrane electrodialysis system.
Further, described ion exchange system is preferably continuous ionic exchange system.
Further, described pretreatment unit includes neutralizing device, coagulant precipitation device and sand filtering device.
Further, described counter-infiltration system is low pressure reverse osmosis system.
Present invention additionally comprises a kind of smelting wastewater circulation utilization method, it is characterised in that comprise the following steps：
Step 1 is pre-processed：Smelting wastewater is processed by pretreatment unit, obtains clear liquid and sludge, and sludge is returned after dehydration
With to smelting system；
Step 2 ion exchange softening：The clear liquid that step 1 is obtained enters ion exchange system, reduces the hardness of water body；
Step 3 ultra-filtration filters：Water body after step 2 is softened carries out ultra-filtration filters, colloid, suspension in removal water body
Thing, obtains ultrafiltration dialysis water and ultrafiltration concentrated water, and ultrafiltration dialysis water SDI<4, ultrafiltration concentrate recirculation is to pre-processing workshop section；
Step 4 reverse-osmosis treated：Ultrafiltration dialysis water is carried out into osmosis filtration, reverse osmosis concentrated water is obtained and counter-infiltration dialysis is produced
Water, counter-infiltration dialysis is produced Water circulation and is used as process water, boiler feedwater in smelting production；
Step 5 electrodialysis is concentrated：Reverse osmosis concentrated water in step 4 is carried out into electrodialysis, electrodialysis fresh water and electrodialysis is obtained
Concentrated water, electrodialysis fresh water returns to counter-infiltration and continues to concentrate；
Step 6 resin removes hardness：Electrodialysis concentrated water in step 5 is entered into chelating resin system, it is hard by resin removal
Degree so that calcium-magnesium content is less than 1ppm in concentrated water；
Step 7 bipolar membrane electrodialysis：Acid, alkali except the salt solution after hardness carries out bipolar membrane electrodialysis, will be obtained in step 6 to return
For smelt production.
Further, described ion exchange system is preferably continuous ionic exchange system.
Further, the pretreatment described in step 1 includes lime neutralization, coagulant precipitation and sand filtration.
Further, chloride ion content is preferably 1-15g/L in the smelting wastewater in step 1.
Further, the smelting wastewater described in step 1 is non-ferrous metal metallurgy waste water.
Further, the ion exchange system described in step 2 uses ion exchange system technique, the water body hardness after softening
Preferably 5-60ppm.
Further, described counter-infiltration system is low pressure reverse osmosis system, and low pressure reverse osmosis operating pressure is preferably 8-
41bar；And the salt content of reverse osmosis concentrated water is less than 20um/cm more than the conductance that water is produced in 30g/l, counter-infiltration dialysis.
Further, the electrodialysis concentrated water chlorine ion concentration after the electrodialysis concentration described in step 5 reaches 30-120g/l.
Using above-mentioned technical proposal, smelting wastewater cyclic utilization system of the present invention and method, for prior art
In deficiency, propose a kind of new, efficient handling process, i.e., using membrane filtration coupling electrodialysis, bipolar membrane electrodialysis work
Skill carries out the treatment of smelting wastewater, can effectively reclaim valuable metal, water resource, and can turn to the inorganic salts resource in water body
Acid, alkali, reduce smelting enterprise's production cost while realizing wastewater zero discharge, the advantages of improve income；Simultaneously to former technique
A large amount of slag (inorganic salts) accumulation treatment are changed in production, inorganic salts can be become into work by bipolar membrane electrodialysis process
Acid, alkali that industry production needs, realize the purpose of resource reclaim.
Brief description of the drawings
Fig. 1 is existing smelting wastewater processing system schematic diagram；
Fig. 2 is smelting wastewater cyclic utilization system schematic diagram of the present invention.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention will be further described.
As shown in Fig. 2 smelting wastewater cyclic utilization system of the present invention, including pretreatment unit, ion exchange system
System, ultrafiltration membrane system, counter-infiltration system, electrodialysis system, chelating resin system and bipolar membrane electrodialysis system, wherein pre-processing
Device is including neutralizing device, coagulant precipitation device and sand filtering device etc.；The supernatant outlet ion of described pretreatment unit is handed over
Change system (preferably continuous ionic exchange system), sludge outlet connection smelting system；The product water of described ion exchange system goes out
Mouth connection ultrafiltration membrane system, the water inlet of regenerative wastewater outlet connection pretreatment unit；The product mouth of a river of described ultrafiltration membrane system
Connection counter-infiltration system；Described counter-infiltration system preferred lower pressure counter-infiltration system, and the concentrated water of counter-infiltration system exports connection
Electrodialysis system, the concentrated water outlet of described electrodialysis system connects chelating resin system, and the product mouth of a river of electrodialysis system passes through
Reflux line connects the water inlet of counter-infiltration system；Described chelating resin system connection bipolar membrane electrodialysis system.
Present invention additionally comprises a kind of smelting wastewater circulation utilization method, following steps are specifically included：
Step 1 is pre-processed：Smelting wastewater is processed by pretreatment unit, obtains clear liquid and sludge, and sludge is returned after dehydration
With to smelting system；Described pretreatment includes lime neutralization, coagulant precipitation and sand filtration；Chloride ion content is preferred in smelting wastewater
It is 1-5g/L；Described smelting wastewater is non-ferrous metal metallurgy waste water；
Step 2 ion exchange softening：The clear liquid that step 1 is obtained enters ion exchange system, reduces the hardness of water body；Ion
Exchange system preferably uses continuous ionic exchange system technique, the water body hardness after softening to be preferably 5-60ppm；
Step 3 ultra-filtration filters：Water body after step 2 is softened carries out ultra-filtration filters, colloid, suspension in removal water body
Thing, obtains ultrafiltration dialysis water and ultrafiltration concentrated water, and ultrafiltration dialysis water SDI ＜ 4, ultrafiltration concentrate recirculation is to pre-processing workshop section；
Step 4 reverse-osmosis treated：Ultrafiltration dialysis water is carried out into osmosis filtration, reverse osmosis concentrated water is obtained and counter-infiltration dialysis is produced
Water, counter-infiltration dialysis is produced Water circulation and is used as process water, boiler feedwater in smelting production；Described counter-infiltration system is
Low pressure reverse osmosis system, low pressure reverse osmosis operating pressure is preferably 8-41bar；And the salt content of reverse osmosis concentrated water more than 30g/l,
The conductance that water is produced in counter-infiltration dialysis is less than 20um/cm；
Step 5 electrodialysis is concentrated：Reverse osmosis concentrated water in step 4 is carried out into electrodialysis, electrodialysis fresh water and electrodialysis is obtained
Concentrated water, electrodialysis fresh water returns to counter-infiltration and continues to concentrate；Electrodialysis concentrated water chlorine ion concentration after described electrodialysis concentration reaches
To in 30-120g/l；
Step 6 resin removes hardness：Electrodialysis concentrated water in step 5 is entered into chelating resin system, it is hard by resin removal
Degree so that calcium-magnesium content is less than 1ppm in concentrated water；
Step 7 bipolar membrane electrodialysis：Acid, alkali except the salt solution after hardness carries out bipolar membrane electrodialysis, will be obtained in step 6 to return
For smelt production.
Needs say that sampling causes soda acid to lose and do not count conversion rate of products in above table.Can be with by above-mentioned data
Find out, (feed liquid adjusts pH to take certain volume electrodialysis concentrated water<4) as material liquid, using low concentration salt solution as sour feeding liquid,
Low concentration alkali is used as alkali feeding liquid.Bipolar membrane electrodialysis process a period of time under different voltages, raw material salt solution is substantially presented and contains
Amount and volume are gradually reduced, and the acid in soda acid room, alkali concn is gradually increasing, and it is the hydrochloric acid of~2mol/l that acid is produced in final sour room,
It is~the alkali of 2.5mol/l that alkali is produced in alkali room.
Can be illustrated by this experiment, electrodialysis concentrated water is carried out producing soda acid scheme using bipolar membrane electrodialysis method is
Feasible；The treatment of smelting wastewater is carried out using membrane filtration coupling electrodialysis, bipolar membrane electrodialysis technique so as to further illustrate,
Valuable metal, water resource can be effectively reclaimed, and the inorganic salts resource in water body can be turned to acid, alkali, realize wastewater zero discharge
While reduce smelting enterprise production cost, the advantages of improve income；It is simultaneously (inorganic to a large amount of slags in former technique productions
Salt) accumulation treatment be changed, by bipolar membrane electrodialysis process by inorganic salts become industrial production need acid, alkali；Realize
The purpose of resource reclaim.
Although specifically showing and describing the present invention with reference to preferred embodiment, those skilled in the art should be bright
In vain, do not departing from the spirit and scope of the present invention that appended claims are limited, in the form and details to this hair
It is bright to make a variety of changes, it is protection scope of the present invention.
Claims (10)
1. a kind of smelting wastewater cyclic utilization system, it is characterised in that：Including pretreatment unit, ion exchange system, milipore filter
System, counter-infiltration system, electrodialysis system, chelating resin system and bipolar membrane electrodialysis system；Described pretreatment unit
Supernatant outlet connects ion exchange system, sludge outlet connection smelting system；The product water out of described ion exchange system
Connection ultrafiltration membrane system, the water inlet of regenerative wastewater outlet connection pretreatment unit；The product mouth of a river of described ultrafiltration membrane system connects
Reversed osmosis system；The concentrated water outlet connection electrodialysis system of described counter-infiltration system, the concentrated water of described electrodialysis system
Outlet connection chelating resin system, the product mouth of a river of electrodialysis system connects the water inlet of counter-infiltration system by reflux line；Institute
The chelating resin system connection bipolar membrane electrodialysis system stated.
2. a kind of smelting wastewater cyclic utilization system according to claim 1, it is characterised in that：Described ion exchange system
It is continuous ionic exchange system to unite.
3. a kind of smelting wastewater cyclic utilization system according to claim 1, it is characterised in that：Described pretreatment unit
Including neutralizing device, coagulant precipitation device and sand filtering device；Described counter-infiltration system is low pressure reverse osmosis system.
4. a kind of smelting wastewater circulation utilization method, it is characterised in that comprise the following steps：
Step 1 is pre-processed：Smelting wastewater is processed by pretreatment unit, obtains clear liquid and sludge, and reuse is extremely after dehydration for sludge
Smelting system；
Step 2 ion exchange softening：The clear liquid that step 1 is obtained enters ion exchange system, reduces the hardness of water body；
Step 3 ultra-filtration filters：Water body after step 2 is softened carries out ultra-filtration filters, and colloid, suspension in removal water body are obtained
Ultrafiltration dialysis water and ultrafiltration concentrated water, and ultrafiltration dialysis water SDI<4, ultrafiltration concentrate recirculation is to pre-processing workshop section；
Step 4 reverse-osmosis treated：Ultrafiltration dialysis water is carried out into osmosis filtration, reverse osmosis concentrated water is obtained and water is produced in counter-infiltration dialysis,
Counter-infiltration dialysis is produced Water circulation and is used as process water, boiler feedwater in smelting production；
Step 5 electrodialysis is concentrated：Reverse osmosis concentrated water in step 4 is carried out into electrodialysis, electrodialysis fresh water and electrodialysis concentrated water is obtained,
Electrodialysis fresh water returns to counter-infiltration and continues to concentrate；
Step 6 resin removes hardness：Electrodialysis concentrated water in step 5 is entered into chelating resin system, hardness is removed by resin, made
Calcium-magnesium content is less than 1ppm in obtaining concentrated water；
Step 7 bipolar membrane electrodialysis：, except the salt solution after hardness carries out bipolar membrane electrodialysis, acid, alkali will be obtained and be back in step 6
Smelt production.
5. a kind of smelting wastewater circulation utilization method according to claim 4, it is characterised in that the ion described in step 2
Exchange system is continuous ionic exchange system.
6. a kind of smelting wastewater circulation utilization method according to claim 4, it is characterised in that pre- described in step 1
Treatment includes lime neutralization, coagulant precipitation and sand filtration.
7. a kind of smelting wastewater circulation utilization method according to claim 4, it is characterised in that the smelting in step 1 is given up
Chloride ion content is 1-15g/L in water；Smelting wastewater described in step 1 is non-ferrous metal metallurgy waste water.
8. a kind of smelting wastewater circulation utilization method according to claim 4, it is characterised in that the ion described in step 2
Exchange system uses ion exchange system technique, and the water body hardness after softening is 5-60ppm.
9. a kind of smelting wastewater circulation utilization method according to claim 4, it is characterised in that described counter-infiltration system
It is low pressure reverse osmosis system, low pressure reverse osmosis operating pressure is 8-41bar；And the salt content of reverse osmosis concentrated water is more than 30g/l, instead
The conductance that water is produced in infiltration dialysis is less than 20um/cm.
10. a kind of smelting wastewater circulation utilization method according to claim 4, it is characterised in that the electric osmose described in step 5
Electrodialysis concentrated water chlorine ion concentration after analysis concentration reaches 30-120g/l.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107417008A (en) * | 2017-08-08 | 2017-12-01 | 云锡文山锌铟冶炼有限公司 | Smelt SO2The method that spent acid is handled during flue gas acid preparing |
| CN110746007A (en) * | 2019-09-27 | 2020-02-04 | 杭州蓝然环境技术股份有限公司 | Resource utilization method of copper smelting wastewater |
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