CN105152207B - A kind of efficient sulfuric acid method titanium pigment water wash system and its washing process - Google Patents
A kind of efficient sulfuric acid method titanium pigment water wash system and its washing process Download PDFInfo
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- CN105152207B CN105152207B CN201510465539.9A CN201510465539A CN105152207B CN 105152207 B CN105152207 B CN 105152207B CN 201510465539 A CN201510465539 A CN 201510465539A CN 105152207 B CN105152207 B CN 105152207B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 122
- 238000005406 washing Methods 0.000 title claims abstract description 110
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000001038 titanium pigment Substances 0.000 title claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 85
- 239000000463 material Substances 0.000 claims abstract description 48
- 239000002253 acid Substances 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000005360 mashing Methods 0.000 claims abstract description 28
- 239000012065 filter cake Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 230000014759 maintenance of location Effects 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 51
- 238000001223 reverse osmosis Methods 0.000 claims description 22
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 21
- 239000008234 soft water Substances 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 229910000349 titanium oxysulfate Inorganic materials 0.000 claims description 14
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 11
- 150000002500 ions Chemical class 0.000 claims description 10
- 230000036571 hydration Effects 0.000 claims description 8
- 238000006703 hydration reaction Methods 0.000 claims description 8
- 239000007844 bleaching agent Substances 0.000 claims description 6
- 229910021645 metal ion Inorganic materials 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 238000001471 micro-filtration Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 239000005864 Sulphur Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 238000004061 bleaching Methods 0.000 abstract description 2
- 238000011017 operating method Methods 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 238000001728 nano-filtration Methods 0.000 description 2
- -1 After state Chemical class 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of efficient sulfuric acid method titanium pigment water wash system and its washing process, water wash system includes filter, acid-restoring plant, beater, water washing cycles tank, the first filtration system, the second filtration system；Washing process comprises the following steps：(1) hydrolyzation material is put into filter and filtered；(2) filter will squeeze out filter cake in hydrolyzation material, and filter cake is transported in beater by filter；(3) beater is beaten to filter cake, and the slurry after mashing is delivered into water washing cycles tank；(4) slurry and washing water after washing are delivered to the first filtration system (5) first filtering system and the dope of particle containing metatitanic acid of retention are delivered in water washing cycles tank again by water washing cycles tank, and the clear liquid after filtering is delivered into the second filtration system；Clear liquid is delivered to water washing cycles tank and is continuing with by (6) second filtration systems, and the dope after filtering is delivered into acid-restoring plant is reclaimed.Present invention eliminates the bleaching kettle operating procedure in existing water wash system, do not differentiate between one in traditional water wash system and wash and washed with two, it is more succinct than traditional water wash system flow.
Description
Technical field
The present invention relates to a kind of water wash system of sulfuric acid method titanium pigment, and in particular to a kind of efficient sulfuric acid method titanium pigment water
Wash system and its washing process.
Background technology
In traditional sulfuric acid method titanium pigment water-washing process, with the progress of washing, acidity, metal ion in filter filter cake
And reducing substances is gradually reduced, due to containing dissolved oxygen in washing water, so the Fe2+ in metatitanic acid is oxidized to Fe3
+ chance exist, and washing latter stage more have this tendency.Simultaneously because the reduction of acidity, Fe3+ will generate Fe (OH) 3
Precipitation, other metal ions can also generate precipitation when acidity is reduced to a certain extent.These precipitations are mixed in metatitanic acid, right
The quality of final products can have a huge impact.In order to eliminate above-mentioned influence, metatitanic acid after current production line will all be washed
The concentrated sulfuric acid and reducing agent are added after filter cake mashing, the precipitation or high oxide that are formed in water-washing process are dissolved as ion like
After state, then carry out second of washing and remove it.Whole technological process is long, cumbersome.
Current washing process is quite big to the demand of water, and conventional is that two wash waters are directly applied to one and washed, and a wash water is (i.e.
Plain boiled water) it is emitted into after filtering or precipitation between water treatment vehicle, plain boiled water water is 20-30 tons/ton titanium dioxide, and is also contained in plain boiled water
There are many metatitanic acid particles for wearing filter, cause the loss of titanium dioxide.
The content of the invention
The present invention is in order to solve the above problems, so as to provide a kind of efficient sulfuric acid method titanium pigment water wash system and its washing
Technique.
To reach above-mentioned purpose, technical scheme is as follows：
A kind of efficient sulfuric acid method titanium pigment water wash system, the sulfuric acid method titanium pigment water wash system includes:
Filter；
Acid-restoring plant, the spent acid discharging opening connection of the acid-restoring plant and filter；
Beater, the filter cake discharging opening connection of the beater and filter；
Water washing cycles tank, the water washing cycles tank is connected with beater；
First filtration system, first filtration system is connected with water washing cycles tank；
Second filtration system, second filtration system respectively with water washing cycles tank, the first filtration system and waste acidity recovery
Device is connected；
In a preferred embodiment of the invention, first filtration system is cross-current type microfiltration membranes, the cross-current type
The precision of microfiltration membranes is 50-1000 nanometers, and transmembrane pressure is 0.05-0.8MPa.
In a preferred embodiment of the invention, second filtration system is made up of NF membrane and reverse osmosis membrane, institute
It is 85-99.8% to the rejection of ferrous ion to state NF membrane, and the rejection to titanyl sulfate is 80-99.8%, and resistance to sulfuric acid is dense
Spend for 0-30%, operating pressure is 1.0-6.5MPa, the reverse osmosis membrane is 85-99.8% to the rejection of ferrous ion, right
The rejection of titanyl sulfate is 80-99.8%, and the rejection to sulfuric acid is 85-99.8%, and resistance to sulfuric acid concentration is 0-15%, operation
Pressure is 1.5-6.5MPa.
In a preferred embodiment of the invention, the water washing cycles tank is closed container, and the water washing cycles tank is adopted
Sealed with nonoxidizing gas, and maintain pressure in tank body to be 1-10KPa.
In a preferred embodiment of the invention, the soft water and washing make-up water used in the beater is all for anaerobic
Water.
A kind of efficient sulfuric acid method titanium pigment washing process, the washing process comprises the following steps：
(1) hydrolyzation material is put into filter and filtered；
(2) filter will be fully squeezed out in hydrolyzation material containing the concentrated acid and the filter cake of metal ion in metatitanic acid, and filter will
Filter cake is transported in beater, and filter is delivered to remaining spent acid is extruded in hydrolyzation material in acid-restoring plant；
(3) soft water is added in beater to be beaten together with the filter cake that filter conveying comes, and the slurry after mashing is conveyed
To water washing cycles tank；
(4) mashing material enters water washing cycles tank, and the soft water that uses also enters water washing cycles tank when washing first, mashing material and
Foreign ion in mashing material is diluted, and then water filtration is gone out by the first filtration system, so miscellaneous in mashing material
Matter ion is just reduced, if soft water is continued into, and the first filtration system clear liquid is constantly discharged, and the foreign ion in mashing material is just
Can constantly it reduce, until being reduced to qualified standard；
(5) wash qualified washing material and be transported to the first filtration system, after conveying is finished, next group mashing material enters washing
Circulating tank continues to wash；
(6) first filtration systems convey water washing cycles tank the metatitanic acid particle entrapment in the slurry and washing water come, will
The dope of particle containing metatitanic acid of retention is delivered in water washing cycles tank again, and water washing cycles tank is dense to the particle containing metatitanic acid of retention
Liquid is washed again, and the clear liquid after filtering is delivered in the second filtration system and filtered again by the first filtration system；
A clear liquid part for (7) first filtration systems is partly into and received through being pumped by reverse osmosis membrane being filtered
Filter membrane row is filtered, and counter-infiltration can retain sulfuric acid, ferrous iron, titanyl sulfate, and nanofiltration only retains ferrous and titanyl sulfate, NF membrane production water
The clear liquid acidity after hydration simultaneously is produced with reverse osmosis membrane and maintains proper range, both will not relatively be intake using reverse osmosis membrane because of complete
It is low, also will not be because of the height of relatively intaking completely using NF membrane, the clear liquid that NF membrane is produced after water and reverse osmosis membrane production hydration simultaneously is sub-
Iron concentration is less than design load, fully meets washing water requirement, the second filtration system by clear liquid be delivered to water washing cycles tank after
Continuous to use, the dope after filtering is delivered into acid-restoring plant is reclaimed.
(8) bleaching agent, bleaching agent are not added with toward addition in water washing cycles tank on a small quantity or within 10-60 minutes before washing terminates
Dosage be former technique dosage 0-50%.
By above-mentioned technical proposal, the beneficial effects of the invention are as follows：
Present invention eliminates the bleaching kettle operating procedure in existing water wash system, one in traditional water wash system is not differentiated between
Wash and washed with two, it is more succinct than traditional water wash system flow.
The present invention is according to content requirement ferrous in accepted stock is washed, on a small quantity or without bleaching agent, while without
Sulfuric acid, reduces production cost, reduces three wastes discharge amount；Recycling for washing water, therefore soft water demand can be realized
Substantially reduce, wastewater treatment capacity is also greatly reduced；The loss of metatitanic acid particle can be reduced, so as to improve the recovery of titanium dioxide
Rate.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is structural representation of the invention；
Fig. 2 is process chart of the invention；
Fig. 3 is the first filtration system and the second filtration system cooperation schematic diagram.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
The efficient sulfuric acid method titanium pigment water wash system provided referring to Fig. 1, the present invention, it includes filter 100, waste acidity recovery
Device 200, beater 300, water washing cycles tank 400, the first filtration system 500, the second filtration system 600.
Filter 100, it is to be used to filter hydrolyzation material, is fully squeezed out containing the concentrated acid in metatitanic acid in hydrolyzation material
The filter cake that solid content with metal ion is 40-85%.
Beater 300, it is connected with filter 100, and it is beaten for the filter cake after being filtered to filter 100, and will
Slurry after mashing is delivered to water washing cycles tank 400.
The soft water and washing make-up water used in beater 300 is all for anaerobic water.
Water washing cycles tank 400, it is connected with beater 300, and it is closed container, specific close using nonoxidizing gas
Envelope, and maintain pressure in tank body to be 1-10KPa, it can convey the slurry come to beater 300 and carry out washing material, and by after washing
Slurry and washing water are delivered to the first filtration system 500 and filtered.
First filtration system 500, it is connected with water washing cycles tank 400, and it is specially cross-current type microfiltration membranes, and precision is 50-
1000 nanometers, transmembrane pressure is 0.05-0.8MPa, and it is, for retaining the metatitanic acid particle in slurry and washing water, and will to cut
The dope of particle containing metatitanic acid stayed is delivered in water washing cycles tank 400 again, and the clear liquid after filtering is delivered into the second filtering
System 600.
Second filtration system 600, it is connected with the first filtration system 500 and water washing cycles tank 400 respectively, and it is to use
Filtered again in conveying the clear liquid after the filtering taken to the first filtration system 500, be filtered into and meet the water of water washing cycles tank 400
The washing water washed, such water washing cycles tank 400 avoids the need for adding washing water.
The specific NF membrane of second filtration system 600 and reverse osmosis membrane composition.
NF membrane, its rejection to ferrous ion is 85-99.8%, and the rejection to titanyl sulfate is 80-99.8%,
Resistance to sulfuric acid concentration is 0-30%, and operating pressure is 1.5-6.5MPa, and it is resistant to mass concentration and is 30% sulfuric acid, and allows sulfuric acid
Through, but ferrous ion and titanyl sulfate can be retained；
Reverse osmosis membrane, its rejection to ferrous ion is 85-99.8%, and the rejection to titanyl sulfate is 80-
99.8%, the rejection to sulfuric acid is 85-99.8%, and resistance to sulfuric acid concentration is 0-15%, and operating pressure is 1.5-6.5MPa, its energy
Resistance to mass concentration is 15% sulfuric acid, can retain sulfuric acid, ferrous ion and titanyl sulfate.
So, it is ferrous by the above-mentioned means, sulfuric acid concentration is 0.05-10% in the water purification that the second filtration system 600 is produced
Ion concentration is 0-10ppm, and the overall rate of recovery is the clear liquid acid after 75-95%, NF membrane production water and reverse osmosis membrane production hydration simultaneously
Degree maintains proper range, both will not because it is complete relatively intake using reverse osmosis membrane it is low, also will not be because of using NF membrane completely
And the clear liquid ferrous ion concentration after height of relatively intaking, NF membrane production water and reverse osmosis membrane production hydration simultaneously is less than design load, so as to
Fully meet washing water requirement.
In addition, in order to economize on resources, the soft water water and the second filtration system 600 for being supplemented to water washing cycles tank 400 are discharged
Water to acid-restoring plant 200 is equal.
Acid-restoring plant 200, it is connected with the filtration system 600 of filter 100 and second respectively, and it is to be used to reclaim filter
100 and second filtration system 600 filter after waste water.
Referring to Fig. 2 and Fig. 3, here is the washing process for above-mentioned water wash system, and the washing process comprises the following steps：
(1) hydrolyzation material is put into filter 100 and filtered；
(2) filter 100 will be squeezed out fully containing the concentrated acid and the filter cake of metal ion in metatitanic acid, filter in hydrolyzation material
Filter cake is transported in beater 300, filter 100 is delivered to acid-restoring plant 200 by remaining spent acid is extruded in hydrolyzation material
In；
(3) added in beater 300 soft water and filter 100 convey the filter cake come together be beaten, and by the slurry after mashing
Material is delivered to water washing cycles tank 400；
(4) mashing material enters water washing cycles tank 400, and the soft water used when washing first also enters water washing cycles tank 400, beats
Foreign ion in slurry and mashing material is diluted, and then water filtration is gone out by the first filtration system 500, is so beaten
Foreign ion in material is just reduced, if soft water is continued into, and the clear liquid of the first filtration system 500 is constantly discharged, in mashing material
Foreign ion will constantly reduce, until be reduced to qualified standard；
(5) wash qualified washing material and be transported to the first filtration system 500, after conveying is finished, next group mashing material enters
Water washing cycles tank 400 continues to wash；
The metatitanic acid particle that (6) first filtration systems 500 convey water washing cycles tank 400 in the slurry and washing water come is cut
Stay, the dope of particle containing metatitanic acid of retention is delivered in water washing cycles tank 400 again, water washing cycles tank 400 contains to retention
Metatitanic acid particle dope is washed again, and the clear liquid after filtering is delivered in the second filtration system 600 by the first filtration system 500
Row is filtered again；
A clear liquid part for (7) first filtration systems 500 is partly into through being pumped by reverse osmosis membrane being filtered
NF membrane row is filtered, and counter-infiltration can retain sulfuric acid, ferrous iron, titanyl sulfate, and nanofiltration only retains ferrous and titanyl sulfate, NF membrane production
Clear liquid acidity after water and reverse osmosis membrane production hydration simultaneously maintains proper range, both will not relatively be entered using reverse osmosis membrane because of complete
Water is low, also will not produce the clear liquid after hydration simultaneously because of the height of relatively intaking completely using NF membrane, NF membrane production water and reverse osmosis membrane
Ferrous ion concentration is less than design load, fully meets washing water requirement, clear liquid is delivered to water washing cycles by the second filtration system 600
Tank 400 is continuing with, and the dope after filtering is delivered into acid-restoring plant 200 is reclaimed.
(8) add a small amount of in past water washing cycles tank 400 within the 10-60 minutes before washing terminates or be not added with bleaching agent, float
The dosage of white agent is the 0-50% of former technique dosage.
When first mashing material enters water washing cycles tank 400, the second filtration system 600 does not produce water, so first
Washing must use soft water, until the second filtration system 600 has production water, can reduce soft water consumption.
From the point of view of water balance, the second filtration system 600 will produce dope, and the clear liquid that the second filtration system 600 is produced is not
Be enough will mashing material be washed till it is qualified, so mashing material washing when should supplement a part of soft water.
If washed all the time with soft water, the acid concentration in qualified material can be lower than the acid concentration in mashing material；If with
The clear liquid of second filtration system 600 is washed, and the acid concentration in qualified material can be than the acid in the qualified material that is only washed with soft water
Concentration is high.So introducing reverse osmosis membrane removes a part of sulfuric acid, to maintain the acid concentration in qualified washing material.
Here is a specific embodiment for above-mentioned technique：
Hydrolyzation material produces the filter cake that solid content is 65% after being filtered through filter 100, filter cake delivers to the He of beater 300 immediately
Anaerobic water is configured to the mashing material of solid content 18%；Mashing material enters water washing cycles tank 400, what the first filtration system 500 was used
Precision is 500 nanometers of tube type filter membrances, and transmembrane pressure is 0.2MPa.Dope containing metatitanic acid after the processing of first filtration system 500
Water washing cycles tank 400 is returned to, clear liquid delivers to the second filtration system 600.In order to reach that ferrous content is less than in qualified material after washing
10ppm, washes end preceding 25 minutes toward zinc powder is added in water washing cycles tank 400, dosage is 1.5 ‰ (to material titaniums) one.The
The NF membrane operating pressure of two filtration systems 600 is 2MPa, and counter-infiltration operating pressure is 3.5MPa, and two-stage NF membrane and two-stage are anti-
The clear liquid ferrous ions concentration permeated after film process is 1.2mg/L, and sulfuric acid content is 0.5%.The clear liquid is sent to water washing cycles
Tank 400 is used as washing water.The dope amount that second filtration system 600 is produced is the inflow of the first filtration system 500
8.5%.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (4)
1. a kind of efficient sulfuric acid method titanium pigment water wash system, it is characterised in that the sulfuric acid method titanium pigment water wash system includes:
Filter；
Acid-restoring plant, the spent acid discharging opening connection of the acid-restoring plant and filter；
Beater, the filter cake discharging opening connection of the beater and filter；
Water washing cycles tank, the water washing cycles tank is connected with beater；
First filtration system, first filtration system is connected with water washing cycles tank, and first filtration system declines for cross-flow
Filter membrane, the precision of the cross-current type microfiltration membranes is 50-1000 nanometers, and transmembrane pressure is 0.05-0.8MPa；
Second filtration system, second filtration system respectively with water washing cycles tank, the first filtration system and acid-restoring plant
Connection, second filtration system is made up of NF membrane and reverse osmosis membrane, and the NF membrane is 85- to the rejection of ferrous ion
99.8%, the rejection to titanyl sulfate is 80-99.8%, and resistance to sulfuric acid concentration is 0-30%, and operating pressure is 1.0-6.5MPa,
The reverse osmosis membrane is 85-99.8% to the rejection of ferrous ion, and the rejection to titanyl sulfate is 80-99.8%, to sulphur
The rejection of acid is 85-99.8%, and resistance to sulfuric acid concentration is 0-15%, and operating pressure is 1.5-6.5MPa.
2. a kind of efficient sulfuric acid method titanium pigment water wash system according to claim 1, it is characterised in that the washing is followed
Ring tank is closed container, and the water washing cycles tank is sealed using nonoxidizing gas, and maintains pressure in tank body to be 1-10KPa.
3. a kind of efficient sulfuric acid method titanium pigment water wash system according to claim 1, it is characterised in that the beater
The middle soft water used and washing make-up water are all for anaerobic water.
4. a kind of efficient sulfuric acid method titanium pigment washing process, is characterised by, the washing process comprises the following steps：
(1) hydrolyzation material is put into filter and filtered；
(2) filter will be fully squeezed out in hydrolyzation material containing the concentrated acid and the filter cake of metal ion in metatitanic acid, and filter is by filter cake
It is transported in beater, filter is delivered to remaining spent acid is extruded in hydrolyzation material in acid-restoring plant；
(3) soft water is added in beater to be beaten together with the filter cake that filter conveying comes, and the slurry after mashing is delivered to water
Wash circulating tank；
(4) mashing material is into water washing cycles tank, and the soft water used when washing first also enters water washing cycles tank, mashing material and mashing
Foreign ion in material is diluted, and then water filtration is gone out by the first filtration system, so mashing material in impurity from
Son is just reduced, if soft water is continued into, the first filtration system clear liquid is constantly discharged, and the foreign ion in mashing material will not
Disconnected reduction, until being reduced to qualified standard；
(5) wash qualified washing material and be transported to the first filtration system, after conveying is finished, next group mashing material enters water washing cycles
Tank continues to wash；
(6) first filtration systems convey water washing cycles tank the metatitanic acid particle entrapment in the slurry and washing water come, will retain
The dope of particle containing metatitanic acid be delivered to again in water washing cycles tank, containing metatitanic acid particle dope weight of the water washing cycles tank to retention
Clear liquid after filtering is delivered in the second filtration system and filtered again by new washing, the first filtration system；
A clear liquid part for (7) first filtration systems is partly into NF membrane through being pumped by reverse osmosis membrane being filtered
Row filtering, counter-infiltration can retain sulfuric acid, ferrous iron, titanyl sulfate, and NF membrane only retains ferrous and titanyl sulfate, NF membrane production water and
Clear liquid acidity after reverse osmosis membrane production hydration simultaneously maintains proper range, both will not relatively be intake using reverse osmosis membrane because of complete
It is low, also will not be because of the height of relatively intaking completely using NF membrane, the clear liquid that NF membrane is produced after water and reverse osmosis membrane production hydration simultaneously is sub-
Iron concentration is less than design load, fully meets washing water requirement, the second filtration system by clear liquid be delivered to water washing cycles tank after
Continuous to use, the dope after filtering is delivered into acid-restoring plant is reclaimed；
(8) bleaching agent, the throwing of bleaching agent are not added with toward addition in water washing cycles tank on a small quantity or within 10-60 minutes before washing terminates
Dosage is the 0-50% of former technique dosage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510465539.9A CN105152207B (en) | 2015-07-31 | 2015-07-31 | A kind of efficient sulfuric acid method titanium pigment water wash system and its washing process |
| PCT/CN2016/070457 WO2017020547A1 (en) | 2015-07-31 | 2016-01-08 | Highly effective sulfuric acid-process titanium dioxide water washing system and water washing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510465539.9A CN105152207B (en) | 2015-07-31 | 2015-07-31 | A kind of efficient sulfuric acid method titanium pigment water wash system and its washing process |
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| Publication Number | Publication Date |
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| CN105152207A CN105152207A (en) | 2015-12-16 |
| CN105152207B true CN105152207B (en) | 2017-07-25 |
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| CN105152207B (en) * | 2015-07-31 | 2017-07-25 | 上海安赐环保科技股份有限公司 | A kind of efficient sulfuric acid method titanium pigment water wash system and its washing process |
| CN107055600A (en) * | 2016-08-31 | 2017-08-18 | 襄阳龙蟒钛业有限公司 | Two washing lotion recoverying and utilizing method in a kind of method for producing gtitanium dioxide with sulphuric acid |
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| CN108176124A (en) * | 2018-02-09 | 2018-06-19 | 上海安赐环保科技股份有限公司 | A kind of filtration system and its technique applied to the washing of carbonic acid powder for lithium |
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| CN111573723A (en) * | 2020-04-30 | 2020-08-25 | 广西金茂钛业有限公司 | Method for producing titanium dioxide by using neutralization sulfuric acid method |
| CN111874945B (en) * | 2020-08-03 | 2022-08-16 | 上海安赐环保科技股份有限公司 | Sulfuric acid process titanium dioxide washing system, purification system and process |
| CN112250106A (en) * | 2020-09-24 | 2021-01-22 | 南京益旻新材料科技有限公司 | Novel metatitanic acid washing process and equipment |
| CN112222158A (en) * | 2020-10-09 | 2021-01-15 | 湖南创大玉兔化工有限公司 | Method for recovering waste materials of rotary kiln |
| CN112266243A (en) * | 2020-12-15 | 2021-01-26 | 安徽中创电子信息材料有限公司 | Method and device for washing superfine powder material for ceramic capacitor |
| CN112619286B (en) * | 2020-12-17 | 2022-06-10 | 龙佰襄阳钛业有限公司 | Method for purifying and crystallizing titanium dioxide solution |
| CN113562916B (en) * | 2021-08-06 | 2023-04-07 | 烟台金正环保科技有限公司 | System and method for high-power concentration of seawater |
| CN114149025B (en) * | 2021-12-30 | 2023-10-13 | 龙佰集团股份有限公司 | Comprehensive utilization method of sulfuric acid process titanium dioxide wastewater |
| CN115367791B (en) * | 2022-08-02 | 2024-02-06 | 龙佰集团股份有限公司 | Method for improving production efficiency of titanium dioxide by sulfuric acid method |
| CN115925160A (en) * | 2022-11-28 | 2023-04-07 | 南通三圣石墨设备科技股份有限公司 | Waste acid full-recycling zero-emission treatment method in graphene production process |
| CN116812972A (en) * | 2023-06-28 | 2023-09-29 | 龙佰集团股份有限公司 | Washing method and application of sulfuric acid process titanium dioxide |
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| CN100500552C (en) * | 2005-11-15 | 2009-06-17 | 上海闵欣环保设备工程公司 | Method for treating waste acid produced from titanium dioxide production using vitriol method |
| CN102336488B (en) * | 2011-09-05 | 2013-01-30 | 宋玉军 | Integral management method for acid sewage generated in titanium white powder production process |
| CN102815745A (en) * | 2012-09-05 | 2012-12-12 | 山东东佳集团股份有限公司 | Water washing process for producing titanium dioxide by using sulfuric acid method which uses ascorbic acid to remove high-valence iron |
| CN103663547B (en) * | 2012-09-24 | 2015-09-23 | 上海凯鑫分离技术有限公司 | The process of acid waste water and recovery process in production process of titanium pigment |
| CN103030175B (en) * | 2012-12-29 | 2014-12-31 | 上海安赐机械设备有限公司 | Device and method applied to metatitanic acid washing room |
| CN104276600B (en) * | 2014-09-16 | 2016-05-18 | 上海安赐环保科技股份有限公司 | A kind of device and method that is applied to the washing of preparing titanium white through chlorination process powder treatment and finishing section |
| CN104692456A (en) * | 2015-01-09 | 2015-06-10 | 上海安赐机械设备有限公司 | Green and environment-friendly sulfuric acid method titanium dioxide production device and process |
| CN204873876U (en) * | 2015-07-31 | 2015-12-16 | 上海安赐机械设备有限公司 | Efficient sulfate process titanium dioxide powder washing system |
| CN105152207B (en) * | 2015-07-31 | 2017-07-25 | 上海安赐环保科技股份有限公司 | A kind of efficient sulfuric acid method titanium pigment water wash system and its washing process |
-
2015
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| CN105152207A (en) | 2015-12-16 |
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