CN204873876U - Efficient sulfate process titanium dioxide powder washing system - Google Patents
Efficient sulfate process titanium dioxide powder washing system Download PDFInfo
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- CN204873876U CN204873876U CN201520571868.7U CN201520571868U CN204873876U CN 204873876 U CN204873876 U CN 204873876U CN 201520571868 U CN201520571868 U CN 201520571868U CN 204873876 U CN204873876 U CN 204873876U
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Abstract
The utility model discloses an efficient sulfate process titanium dioxide powder washing system, sulfate process titanium dioxide powder washing system includes: the filter, spent acid recovery unit, spent acid recovery unit is connected with the spent acid discharge gate of filter, the beating machine, the beating machine is connected with the filter cake discharge gate of filter, washing circulation jar, washing circulation jar and beating machine intercommunication, a filtration system, a filtration system and washing circulation jar intercommunication, the 2nd filtration system, the 2nd filtration system feeds through with washing circulation jar, a filtration system and spent acid recovery unit respectively. The utility model discloses cancelled the bleaching cauldron operating procedure in the current washing system, one in the traditional washing system of not distinguishing washes and two wash, and be more succinct than tradition washing system flow.
Description
Technical field
The utility model relates to a kind of water wash system of sulfuric acid method titanium pigment, is specifically related to a kind of sulfuric acid method titanium pigment water wash system efficiently.
Background technology
In traditional sulfuric acid method titanium pigment water washing process, along with the carrying out of washing, acidity in filter filter cake, metal ion and reducing substances all progressively reduce, owing to containing dissolved oxygen in washing water, so the Fe2+ in metatitanic acid has the chance being oxidized to Fe3+ to exist, and more there is this tendency latter stage in washing.Simultaneously due to the reduction of acidity, Fe3+ will generate Fe (OH) 3 and precipitate, and other metal ion also can generate precipitation when acidity is reduced to a certain degree.These precipitations are mixed in metatitanic acid, can have a huge impact the quality of the finished product.In order to eliminate above-mentioned impact, current production line all adds the vitriol oil and reductive agent by after washing after the making beating of metatitanic acid filter cake, after the precipitation formed or high oxide are dissolved as ionic condition, then carry out second time and washes and removed in water washing process.Whole technical process is long, complex operation.
Current washing process is quite large to the demand of water, conventional is, and two wash waters directly apply mechanically washes to one, one wash water (i.e. plain boiled water) after filtration or precipitation after be disposed between water treatment vehicle, the plain boiled water water yield is 20-30 ton/ton titanium dioxide, and also containing the metatitanic acid particle much wearing filter in plain boiled water, cause the loss of titanium dioxide.
Utility model content
The utility model in order to solve the problem, thus provides a kind of sulfuric acid method titanium pigment water wash system and washing process thereof efficiently.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of sulfuric acid method titanium pigment water wash system efficiently, described sulfuric acid method titanium pigment water wash system comprises:
Filter;
Acid-restoring plant, described acid-restoring plant is connected with the spent acid discharge port of filter;
Hollander, described hollander is connected with the filter cake discharge port of filter;
Water washing cycles tank, described water washing cycles tank is communicated with hollander;
First filtering system, described first filtering system is communicated with water washing cycles tank;
Second filtering system, described second filtering system is communicated with acid-restoring plant with water washing cycles tank, the first filtering system respectively;
In a preferred embodiment of the present utility model, described first filtering system is cross-current type microfiltration membrane, and the precision of described cross-current type microfiltration membrane is 50-1000 nanometer, and transmembrane pressure is 0.05-0.8MPa.
In a preferred embodiment of the present utility model, described second filtering system is made up of nanofiltration membrane and reverse osmosis membrane, described nanofiltration membrane is 85-99.8% to the rejection of ferrous ion, be 80-99.8% to the rejection of titanyl sulfate, resistance to sulfuric acid concentration is 0-30%, working pressure is 1.0-6.5MPa, described reverse osmosis membrane is 85-99.8% to the rejection of ferrous ion, be 80-99.8% to the rejection of titanyl sulfate, be 85-99.8% to the rejection of sulfuric acid, resistance to sulfuric acid concentration is 0-15%, and working pressure is 1.5-6.5MPa.
In a preferred embodiment of the present utility model, described water washing cycles tank is encloses container, and described water washing cycles tank adopts nonoxidizing gas sealing, and to maintain tank body internal pressure be 1-10KPa.
In a preferred embodiment of the present utility model, the soft water adopted in described hollander and washing supplementary feed are all oxygen-free water.
By technique scheme, the beneficial effects of the utility model are:
The utility model eliminate in existing water wash system bleaching still operation steps, do not distinguish one in traditional water wash system and wash and wash with two, more succinct than traditional water wash system flow process.
The utility model, according to content requirement ferrous in washing accepted stock, adds SYNTHETIC OPTICAL WHITNER on a small quantity or not, does not add sulfuric acid simultaneously, decreases production cost, reduce three wastes discharge amount; Can realize the recycle of washing water, therefore soft water demand reduces greatly, and wastewater treatment capacity also significantly reduces; The loss of metatitanic acid particle can be reduced, thus improve the rate of recovery of titanium dioxide.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Embodiment
The technique means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
See Fig. 1, the efficient sulfuric acid method titanium pigment water wash system that the utility model provides, it comprises filter 100, acid-restoring plant 200, hollander 300, water washing cycles tank 400, first filtering system 500, second filtering system 600.
Filter 100, it is for filtering hydrolyzation material, and the solid content fully squeezed out in hydrolyzation material containing the concentrated acid in metatitanic acid and metal ion is the filter cake of 40-85%.
Hollander 300, it is connected with filter 100, and it is for pulling an oar to the filter cake after filter 100 filtration, and by the slurry transferring after making beating to water washing cycles tank 400.
The soft water adopted in hollander 300 and washing supplementary feed are all oxygen-free water.
Water washing cycles tank 400, it is connected with hollander 300, it is encloses container, concrete employing nonoxidizing gas sealing, and to maintain tank body internal pressure be 1-10KPa, it can wash material to the slurry that hollander 300 transports, and the slurry after washing and washing water are delivered to the first filtering system 500 and filtered.
First filtering system 500, it is connected with water washing cycles tank 400, it is specially cross-current type microfiltration membrane, precision is 50-1000 nanometer, transmembrane pressure is 0.05-0.8MPa, it is the metatitanic acid particle for retaining in slurry and washing water, and by being again delivered in water washing cycles tank 400 containing metatitanic acid particle dope of retaining, and the clear liquid after filtering is delivered to the second filtering system 600.
Second filtering system 600, it is connected with the first filtering system 500 and water washing cycles tank 400 respectively, it is that clear liquid after the filtration for transporting the first filtering system 500 filters again, be filtered into the washing water meeting water washing cycles tank 400 and wash, such water washing cycles tank 400 does not just need to add washing water.
Second filtering system 600 is specifically made up of nanofiltration membrane and reverse osmosis membrane.
Nanofiltration membrane, it is 85-99.8% to the rejection of ferrous ion, is 80-99.8% to the rejection of titanyl sulfate, resistance to sulfuric acid concentration is 0-30%, and working pressure is 1.5-6.5MPa, and its ability mass concentration is the sulfuric acid of 30%, and allow sulfuric acid through, but ferrous ion and titanyl sulfate can be retained;
Reverse osmosis membrane, it is 85-99.8% to the rejection of ferrous ion, be 80-99.8% to the rejection of titanyl sulfate, be 85-99.8% to the rejection of sulfuric acid, resistance to sulfuric acid concentration is 0-15%, working pressure is 1.5-6.5MPa, and its ability mass concentration is the sulfuric acid of 15%, can retain sulfuric acid, ferrous ion and titanyl sulfate.
Like this, by the way, in the water purification that second filtering system 600 produces, sulfuric acid concentration is 0.05-10%, ferrous ion concentration is 0-10ppm, the overall rate of recovery is 75-95%, clear liquid acidity after nanofiltration membrane produces water and the hydration also of reverse osmosis membrane product maintains proper range, both comparatively can not intake low because of using reverse osmosis membrane completely, also comparatively can not intake high because of using nanofiltration membrane completely, nanofiltration membrane produces the clear liquid ferrous ion concentration after water and the hydration also of reverse osmosis membrane product lower than design load, thus can meet washing water requirement completely.
In addition, in order to economize on resources, the soft water water yield being supplemented to water washing cycles tank 400 is equal with the water yield that the second filtering system 600 is disposed to acid-restoring plant 200.
Acid-restoring plant 200, it is connected with filter 100 and the second filtering system 600 respectively, and it is the waste water for reclaiming after filter 100 and the filtration of the second filtering system 600.
Here is specific works step of the present utility model:
(1) hydrolyzation material is put into filter 100 to filter;
(2) filter cake that will fully squeeze out in hydrolyzation material containing the concentrated acid in metatitanic acid and metal ion of filter 100, filter cake is transported in hollander 300 by filter, and filter 100 is delivered in acid-restoring plant 200 by extruding remaining spent acid in hydrolyzation material;
(3) add in hollander 300 together with filter cake that soft water and filter 100 transport and pull an oar, and by the slurry transferring after making beating to water washing cycles tank 400;
(4) material of pulling an oar enters water washing cycles tank 400, the soft water used during washing first also enters water washing cycles tank 400, making beating material and the foreign ion of pulling an oar in material are diluted, then by the first filtering system 500, water filtration is gone out, foreign ion in such making beating material just reduces, if soft water continues to enter, the first filtering system 500 clear liquid is constantly discharged, foreign ion in making beating material will constantly reduce, until be reduced to qualified standard;
(5) wash qualified washing material and be transported to the first filtering system 500, after conveying, next batch making beating material enters water washing cycles tank 400 and continues washing;
Metatitanic acid particle entrapment in the slurry that water washing cycles tank 400 transports by (6) first filtering systems 500 and washing water, again be delivered in water washing cycles tank 400 by what retain containing metatitanic acid particle dope, water washing cycles tank 400 is to again washing containing metatitanic acid particle dope of retaining, and the clear liquid after filtration is delivered in the second filtering system 600 and again filters by the first filtering system 500;
A clear liquid part for (7) first filtering systems 500 is delivered to reverse osmosis membrane through high-pressure pump and is filtered, a part enters nanofiltration membrane row and filters, reverse osmosis can retain sulfuric acid, ferrous, titanyl sulfate, nanofiltration only retains ferrous iron and titanyl sulfate, clear liquid acidity after nanofiltration membrane produces water and the hydration also of reverse osmosis membrane product maintains proper range, both comparatively can not intake low because of using reverse osmosis membrane completely, also comparatively can not intake high because of using nanofiltration membrane completely, nanofiltration membrane produces the clear liquid ferrous ion concentration after water and the hydration also of reverse osmosis membrane product lower than design load, meet washing water requirement completely, clear liquid is delivered to water washing cycles tank 400 and continues to use by the second filtering system 600, dope after filtration is delivered to acid-restoring plant 200 reclaim.
(8) add in water washing cycles tank 400 in 10-60 minute before washing terminates and add SYNTHETIC OPTICAL WHITNER on a small quantity or not, the dosage of SYNTHETIC OPTICAL WHITNER is the 0-50% of former technique dosage.
Here is a specific embodiment of the present utility model:
Hydrolyzation material produces the filter cake that solid content is 65% after filter 100 filters, and the making beating material that hollander 300 and oxygen-free water are mixed with solid content 18% delivered to immediately by filter cake; The precision that making beating material enters the employing of water washing cycles tank 400, first filtering system 500 is 500 nanometer tube type filter membrances, and transmembrane pressure is 0.2MPa.Dope containing metatitanic acid after first filtering system 500 processes returns water washing cycles tank 400, and the second filtering system 600 delivered to by clear liquid.In order to reach in the rear accept of washing, ferrous content is lower than 10ppm, and wash one and terminate in water washing cycles tank 400, to add zinc powder in first 25 minutes, dosage is 1.5 ‰ (to material titaniums).The nanofiltration membrane working pressure of the second filtering system 600 is 2MPa, and reverse osmosis working pressure is 3.5MPa, and the clear liquid ferrous ions concentration after two-stage nanofiltration membrane and the process of two steps ro film is 1.2mg/L, and sulfuric acid content is 0.5%.This clear liquid is sent to water washing cycles tank 400 and uses as washing water.The dope amount that second filtering system 600 produces is 8.5% of the first filtering system 500 flooding quantity.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. an efficient sulfuric acid method titanium pigment water wash system, is characterized in that, described sulfuric acid method titanium pigment water wash system comprises:
Filter;
Acid-restoring plant, described acid-restoring plant is connected with the spent acid discharge port of filter;
Hollander, described hollander is connected with the filter cake discharge port of filter;
Water washing cycles tank, described water washing cycles tank is communicated with hollander;
First filtering system, described first filtering system is communicated with water washing cycles tank;
Second filtering system, described second filtering system is communicated with acid-restoring plant with water washing cycles tank, the first filtering system respectively.
2. the efficient sulfuric acid method titanium pigment water wash system of one according to claim 1, is characterized in that, described first filtering system is cross-current type microfiltration membrane, and the precision of described cross-current type microfiltration membrane is 50-1000 nanometer, and transmembrane pressure is 0.05-0.8MPa.
3. the efficient sulfuric acid method titanium pigment water wash system of one according to claim 1, it is characterized in that, described second filtering system is made up of nanofiltration membrane and reverse osmosis membrane, described nanofiltration membrane is 85-99.8% to the rejection of ferrous ion, be 80-99.8% to the rejection of titanyl sulfate, resistance to sulfuric acid concentration is 0-30%, working pressure is 1.0-6.5MPa, described reverse osmosis membrane is 85-99.8% to the rejection of ferrous ion, be 80-99.8% to the rejection of titanyl sulfate, be 85-99.8% to the rejection of sulfuric acid, resistance to sulfuric acid concentration is 0-15%, working pressure is 1.5-6.5MPa.
4. the efficient sulfuric acid method titanium pigment water wash system of one according to claim 1, is characterized in that, described water washing cycles tank is encloses container, and described water washing cycles tank adopts nonoxidizing gas sealing, and to maintain tank body internal pressure be 1-10KPa.
5. the efficient sulfuric acid method titanium pigment water wash system of one according to claim 1, is characterized in that, the soft water adopted in described hollander and washing supplementary feed are all oxygen-free water.
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| CN201520571868.7U CN204873876U (en) | 2015-07-31 | 2015-07-31 | Efficient sulfate process titanium dioxide powder washing system |
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| CN201520571868.7U CN204873876U (en) | 2015-07-31 | 2015-07-31 | Efficient sulfate process titanium dioxide powder washing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152207A (en) * | 2015-07-31 | 2015-12-16 | 上海安赐机械设备有限公司 | High-efficiency sulfuric acid method titanium dioxide washing system and washing process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152207A (en) * | 2015-07-31 | 2015-12-16 | 上海安赐机械设备有限公司 | High-efficiency sulfuric acid method titanium dioxide washing system and washing process thereof |
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Address after: 201201 Shanghai, Pudong New Area Jin Tang Road, No. 2, block B, 145 Patentee after: SHANGHAI ANHORN ENVIRONMENTAL TECHNOLOGY CO., LTD. Address before: 201201 Shanghai, Pudong New Area Jin Tang Road, No. 2, block B, 145 Patentee before: Shanghai Anhorn Mechanical Equipment Co., Ltd. |