CN112441674A - Titanium white wastewater treatment equipment and method - Google Patents
Titanium white wastewater treatment equipment and method Download PDFInfo
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- CN112441674A CN112441674A CN201910808283.5A CN201910808283A CN112441674A CN 112441674 A CN112441674 A CN 112441674A CN 201910808283 A CN201910808283 A CN 201910808283A CN 112441674 A CN112441674 A CN 112441674A
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 235000010215 titanium dioxide Nutrition 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims description 33
- 238000004065 wastewater treatment Methods 0.000 title abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 89
- 239000002351 wastewater Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 29
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000001301 oxygen Substances 0.000 claims abstract description 21
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 21
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 21
- 239000002699 waste material Substances 0.000 claims abstract description 18
- 238000003723 Smelting Methods 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 230000008901 benefit Effects 0.000 abstract description 7
- 239000002893 slag Substances 0.000 description 18
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 238000006386 neutralization reaction Methods 0.000 description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 239000000292 calcium oxide Substances 0.000 description 7
- 235000012255 calcium oxide Nutrition 0.000 description 7
- 229910052593 corundum Inorganic materials 0.000 description 7
- 239000012066 reaction slurry Substances 0.000 description 7
- 229910001845 yogo sapphire Inorganic materials 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 229910052681 coesite Inorganic materials 0.000 description 6
- 229910052906 cristobalite Inorganic materials 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229910052682 stishovite Inorganic materials 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 229910052905 tridymite Inorganic materials 0.000 description 6
- 235000012245 magnesium oxide Nutrition 0.000 description 5
- 239000002910 solid waste Substances 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- -1 iron ions Chemical class 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 229910001678 gehlenite Inorganic materials 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 235000012241 calcium silicate Nutrition 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910052839 forsterite Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052661 anorthite Inorganic materials 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- GWWPLLOVYSCJIO-UHFFFAOYSA-N dialuminum;calcium;disilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] GWWPLLOVYSCJIO-UHFFFAOYSA-N 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Inorganic materials O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
Images
Classifications
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- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a titanium dioxide wastewater treatment device, which comprises: the reaction tank comprises a tank bottom and a tank wall, and a separation plate is further arranged on the tank bottom and separates the reaction tank into a reaction zone and a buffer zone; a first feeding pipe for feeding reaction materials and a second feeding pipe for feeding titanium white wastewater are respectively arranged on the wall part of the reaction zone, and the feeding direction of the first feeding pipe and the feeding direction of the second feeding pipe form a preset angle; a first discharge pipe for discharging the treated slurry is provided on the wall portion of the buffer zone. When the titanium white wastewater is treated, the reaction material containing the metal smelting waste residue powder and the titanium white wastewater is sent into the reaction zone to react under the condition of oxygen, and then is discharged from the first discharge pipe through the buffer zone, so that the treatment of the titanium white wastewater can be realized, and the titanium white wastewater has good economic and social benefits.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a titanium dioxide wastewater treatment device and method.
Background
Titanium dioxide is an important inorganic chemical product, is usually used as a white pigment, and has the advantages of stable chemical properties, high refractive index, uniform particle size distribution and the like, so that the titanium dioxide is widely applied to the fields of coating, plastics, papermaking and the like. The production of titanium dioxide mainly comprises two methods, namely a sulfuric acid method and a chlorination method. The sulfuric acid method is widely used in China because the process method is simple and can be used for treating ores with low taste.
In the process of producing titanium dioxide by a sulfuric acid method, concentrated sulfuric acid is used as a process substance to soak the titanium-containing material. The production process for producing titanium dioxide by the sulfuric acid method has the problem of large discharge amount of three wastes such as waste water, waste gas, waste residue and the like, and the discharge amount of acid waste water can reach 100-150T/T titanium dioxide. The treatment of the titanium white wastewater is a difficult problem which is urgently needed to be solved in the front of titanium white production enterprises.
At present, in the technology for treating the titanium white wastewater, a mature treatment process with stable operation is a neutralization method. The neutralization method generally adopts solid wastes such as waste alkali, carbide mud, lime and the like for neutralization according to local conditions of production. The main problems of the method for treating the sulfate process titanium dioxide wastewater are as follows: the solid waste is still obtained after neutralization treatment by the solid waste, the hydrophobicity is poor, the water content reaches more than 40 percent, the solid waste cannot be directly used, and the subsequent treatment needs high cost.
The titanium white wastewater treatment technology disclosed in the Chinese patent document CN106315910A is characterized in that quicklime is used for neutralization treatment and aeration, a flocculating agent is added for coagulating sedimentation, then the obtained product enters an ultrafiltration membrane tank for filtration, and finally inorganic salt is removed through a reverse osmosis membrane component to form qualified industrial wastewater. Chinese patent document CN105776667A discloses a method of treating with polyacrylamide, then ashing, adding calcium carbonate as a neutralizing agent for neutralization, and finally filtering and coagulating. The method has the main problems of complex process, high treatment cost and poor economic benefit.
In view of the disadvantages of the prior art, there is a need for a titanium white wastewater treatment apparatus and method with improved economic efficiency.
Disclosure of Invention
In order to solve the technical problem, the invention provides a titanium dioxide wastewater treatment device, which comprises:
the reaction tank comprises a tank bottom and a tank wall, wherein a separation plate is arranged on the tank bottom and separates the reaction tank into a reaction zone and a buffer zone;
a first feeding pipe for feeding reaction materials and a second feeding pipe for feeding titanium white wastewater are respectively arranged on the wall part of the reaction zone, and the feeding direction of the first feeding pipe and the feeding direction of the second feeding pipe form a preset angle;
a first discharge pipe for discharging the treated slurry is provided on the wall portion of the buffer zone.
Preferably, a plurality of air inlet hoses for feeding oxygen-enriched air are arranged at the bottom of the tank of the reaction zone.
Preferably, a plurality of stirring devices are provided in the reaction zone.
Preferably, the stirring device comprises a stirring rod and a plurality of groups of stirring blades arranged on the stirring rod.
Preferably, the first feed pipe and the second feed pipe are mounted at a bottom position of the wall portion of the tank.
Preferably, the feeding direction of the first feeding pipe and the feeding direction of the second feeding pipe are generally opposite.
Preferably, a plurality of discharge holes are arranged at the top position of the isolation plate.
Preferably, a plurality of buffer plates are arranged in the buffer area, each buffer plate comprises a fixed end connected with the corresponding groove wall portion and an open end opposite to the fixed end in the direction, and the open ends are spaced from the groove wall portions at preset distances.
Preferably, the fixed ends of the adjacent ones of the plurality of buffer plates are oppositely disposed.
The invention also provides a method for treating the titanium white wastewater by using the treatment equipment, which comprises the steps of feeding a reaction material containing metal smelting waste residue powder and the titanium white wastewater into the reaction tank, reacting the reaction material with the titanium white wastewater under an oxygen-containing condition to obtain treatment slurry, then carrying out filter pressing treatment, and separating to obtain treatment water and treatment materials.
The invention provides a titanium white wastewater treatment device which comprises a reaction tank, and a first feeding pipe, a second feeding pipe and a first discharging pipe which are arranged on the reaction tank, wherein an isolation plate is arranged in the reaction tank and isolates the reaction tank into a reaction zone and a buffer zone. When the titanium white wastewater is treated, reaction materials containing metal smelting waste residue powder and the titanium white wastewater are fed into a reaction zone to react under the condition of oxygen, wherein the metal smelting waste residue comprises oxides of Ca, Mg, Al, Si and the like, and the acidic component in the titanium white wastewater is H2SO4Oxide and H2SO4The neutralization reaction is carried out under the condition of oxygen. The invention makes the two wastes react under proper conditions, not only solves the treatment of the metal smelting waste residue, but also realizes the treatment of the titanium white waste water, and has good economic benefit and social benefit.
Drawings
FIG. 1 is a schematic view of a titanium dioxide wastewater treatment apparatus according to the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, a schematic diagram of an embodiment of a titanium dioxide wastewater treatment apparatus provided by the present invention includes a reaction tank 101, which includes a tank bottom 101a and a tank wall 101b, wherein a partition plate 101c is disposed on the tank bottom, and partitions the reaction tank into a reaction zone 101d and a buffer zone 101 e; the reaction tank may be made of a metal material or may be constructed of cement, and the present invention is not particularly limited thereto.
A first feeding pipe 102 for feeding reaction materials and a second feeding pipe 103 for feeding titanium dioxide wastewater are respectively arranged on the wall of the reaction zone 101d, and the feeding directions of the first feeding pipe 102 and the second feeding pipe 103 form a predetermined angle, and the predetermined angle is preferably 60-180 degrees, and more preferably 90-180 degrees. In this embodiment, the feeding directions of the first feeding pipe 102 and the second feeding pipe 103 are 180 °, i.e. opposite, which is favorable for forming the turbulent flow of the reaction slurry, so that the reaction slurry can be more fully reacted. In this embodiment, the feed locations of the first and second feed tubes are of equal height and are located near the bottom of the trough wall.
According to the present invention, the partition plate 101c serves to divide the reaction tank into the reaction region 101d and the buffer region 101e, and the reaction material is discharged into the buffer region through the discharge holes 101f provided at the upper portion of the partition plate after sufficient reaction in the reaction region, and the shape and number of the discharge holes are not particularly limited as long as discharge of the reaction slurry is facilitated.
At the bottom of the reaction zone, there are provided a plurality of air inlet hoses 201 for feeding oxygen-enriched air, through which hoses 201 the oxygen-enriched air is fed to the reaction zone, the oxygen content of the oxygen-enriched air being preferably 22 to 50%, more preferably 23 to 50%, more preferably 25 to 50%, more preferably 28 to 50% in terms of the oxygen concentration by volume.
According to the present invention, in order to allow the reaction slurry to react more sufficiently in the reaction zone, a plurality of stirring devices may be further disposed in the reaction zone, each stirring device including a stirring rod 301a on which a stirring blade 301b is disposed, and the reaction slurry formed in the reaction zone is sufficiently stirred by the stirring device, so that the added reaction material and the titanium white water are sufficiently mixed and reacted.
According to the invention, a plurality of buffer plates 401 can be arranged in the buffer area, the buffer plates are arranged in the buffer area in a parallel manner, and the buffer plates 401 comprise fixed ends connected with the wall of the reaction tank and open ends opposite to the fixed ends; the fixed end and the reaction tank wall are fixedly connected, a gap is reserved between the open end and the reaction tank wall, and the fixed ends of the adjacent buffer plates are oppositely arranged. The number of the buffer plates is not particularly limited, and two buffer plates are shown in fig. 1, which are designed according to the size of an actual reaction tank, and a long buffer passage is formed in the buffer zone by the plurality of buffer plates, so that the reaction slurry can be further reacted to achieve a better effect. The buffer zone is further provided with a first discharge pipe 501, and slurry subjected to full reaction is discharged from the first discharge pipe 501.
According to the invention, the titanium white wastewater is acidic wastewater H produced in the process of producing titanium dioxide by using a sulfuric acid method2SO4The content is less than 10 wt%, more preferably less than 8 wt%, more preferably less than 6 wt%, more preferably less than 5 wt%.
According to the invention, the process for producing titanium dioxide by a sulfuric acid method is to use concentrated sulfuric acid to soak titanium-containing materials such as titanium ore and the like, then a large amount of wastewater can be generated, and the impurity components of the wastewater mainly comprise iron ions, ferrous ions, metatitanic acid, manganese ions, copper ions, zinc ions, chromium ions, solid suspended matters and the like; wherein the sulfur acid is generally 1 to 15%. The traditional process uses lime for neutralization treatment, and has the main problems that: the water in the materials after lime treatment is not easy to remove and can only be treated as solid waste. The inventor considers that the titanium-containing wastewater is treated by using the metal smelting waste residues as reaction materials so as to achieve better treatment effect.
According to the present invention, the reaction material used is a reaction material containing metallurgical slag powder, which may be one or more of steel slag, blast furnace slag, or non-ferrous metal smelting slag including, but not limited to, copper smelting slag. The steel slag mainly comprises oxides of Ca, Mg, Si, Fe and the like, and the formed minerals mainly comprise dicalcium silicate (2CaOSiO2), tricalcium silicate (3CaOSiO2), forsterite (CaO MgO SiO2), caducite (3CaOMgOSiO2), gehlenite (2CaO, Al2O3 and SiO2) and RO, and the like.
The chemical components of the iron-making blast furnace slag are oxides such as Ca, Mg, Al, Si, etc., and minerals composed of these metal and nonmetal oxides (CaO, SiO2, Al2O3, MgO) and the like mainly include: gehlenite (2CaO, Al2O3, SiO2), gehlenite (2 caomgsio 2), dicalcium silicate (2CaO, SiO2), cyclowollastonite (CaOSiO2), anorthite (CaO, Al2O3, 2SiO2), forsterite (caomgsio 2), magadite (3CaOMgO2SiO2), and stevensite (2CaOMgO2SiO 2).
According to the invention, fly ash or a mixture of fly ash and metal smelting waste slag can be used as the reaction material for treating the titanium white wastewater, wherein the fly ash is fine ash captured from flue gas generated after coal combustion, and the main oxides comprise SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2, MgO, K2O, Na2O, SO3, MnO2 and the like.
According to the invention, the reaction mass can be fed continuously as a powder directly or the powder can be mixed with water beforehand to form a slurry, preferably 1 to 1000g/L, more preferably 1 to 100g/L, and still more preferably 1 to 50g/L, with respect to the solids content of the slurry. The particle size of the powder of the reaction material is preferably 100 mesh or less, more preferably 150 mesh or less, and still more preferably 200 mesh or less. According to the invention, the reaction of the reaction mass with the titanium white wastewater under oxygen-containing conditions means that air and/or oxygen-enriched gas, preferably oxygen-enriched air, is introduced into the reaction tank.
According to the present invention, the reaction time of the reaction material and the titanium white waste water is not particularly limited, and it is necessary to obtain a treated slurry after sufficiently reacting with the titanium white waste water. Then sending the reaction slurry into a filter press for filter pressing separation treatment to obtain treated water and treated materials; the pH of the treated water is preferably 6 to 10, more preferably 6.5 to 9, and still more preferably 6.8 to 8. According to the invention, the water content of the treatment mass is less than or equal to 30 wt.%, more preferably less than or equal to 25 wt.%, more preferably less than or equal to 24 wt.%, more preferably less than or equal to 22 wt.%. The filter press may use a filter press well known to those skilled in the art.
The invention provides a titanium white wastewater treatment device, which comprises a reaction tank, a first feeding pipe, a second feeding pipe and a first discharging pipe, wherein the first feeding pipe, the second feeding pipe and the first discharging pipe are arranged on the reaction tank; and the reaction tank is internally provided with a partition board which partitions the reaction tank into a reaction zone and a buffer zone. When the titanium white wastewater is treated, the waste slag powder (reaction material) containing metal smelting and the titanium white wastewater are sent into a reaction zone, and the waste slag powder and the titanium white wastewater are reacted under the condition of oxygen; the metal smelting waste residue comprises oxides of Ca, Mg, Al, Si and the like; the acid component in the titanium dioxide wastewater is H2SO4Oxide and H2SO4The neutralization reaction is carried out under the condition of oxygen. The invention makes the two wastes react under proper conditions, not only solves the treatment of the metal smelting waste residue, but also realizes the treatment of the titanium white waste water, and has good economic benefit and social benefit
In order to further illustrate the present invention, the following will describe the method for treating titanium dioxide wastewater in detail with reference to the following examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Titanium dioxide wastewater H to be treated2SO4The steel slag with the concentration of 6 weight percent as reaction materials comprises 40.0 to 54.0 weight percent of CaO and 8.0 to 20.0 weight percent of SiO according to the weight ratio of chemical components25.0-22.0% of FeO and 0.6-6.0% of Al2O33.0-12.0% of MgO. The steel slag is crushed to-150 meshes to +200 meshes for later use.
In the reaction process, the designed flow of the titanium white wastewater is 460m3/h～500m3H, steel slag is continuously fed from the first pipe 102 into the reaction zone 101a, steel slag is fed from the second pipe 103 into the reaction zone 101a in the form of slurry containing 25% of solid, oxygen-enriched air is blown into the reaction tank from the air inlet hose 201, the oxygen content of the oxygen-enriched air is 40% (volume ratio), the flow rate of the oxygen-enriched air is 10m3/h。
Titanium white waste water, slag thick liquid produce the torrent effect in the reaction zone, and reaction material carries out abundant reaction in the reaction zone back, discharges to the buffer zone through setting up in the discharge opening 101f on division board upper portion, discharges from first discharging pipe 501, then gets into filter-pressing device (not shown) and carries out the filter-pressing, obtains the mud and the treated water that the water content is 24%, because mud water content is lower, can directly be used as building material usefulness, measures treated water pH value 7.5.
Example 2
Titanium dioxide wastewater H to be treated2SO48 wt% concentration, iron-smelting slag as reaction material, CaO 37.0-42.0 wt% and SiO 36.0-40.0 wt% as chemical components20.4 to 0.9 percent of FeO and 7.0 to 9.5 percent of Al2O3And 3.5-12.0% of MgO, and crushing the iron-making slag to-150 meshes to +200 meshes for later use.
Titanium white waste water, waste slag thick liquid produce the torrent effect in the reaction zone, and reaction material carries out abundant reaction back in the reaction zone, discharges to the buffer zone through setting up in the discharge opening 101f on division board upper portion, discharges from first discharging pipe 501, then gets into filter pressing device (not shown) and carries out the filter-pressing, obtains the mud and the treated water that the water content is 22.3%, because mud water content is lower, can directly be used as building material usefulness, measures treated water pH value 7.8.
The titanium dioxide wastewater treatment method provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are provided only to assist understanding of the method and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a titanium dioxide waste water's treatment facility which characterized in that includes:
the reaction tank comprises a tank bottom and a tank wall, wherein a separation plate is arranged on the tank bottom and separates the reaction tank into a reaction zone and a buffer zone;
a first feeding pipe for feeding reaction materials and a second feeding pipe for feeding titanium white wastewater are respectively arranged on the wall part of the reaction zone, and the feeding direction of the first feeding pipe and the feeding direction of the second feeding pipe form a preset angle;
a first discharge pipe for discharging the treated slurry is provided on the wall portion of the buffer zone.
2. The process apparatus according to claim 1, wherein a plurality of air inlet hoses for feeding oxygen-enriched air are provided at the bottom of the tank of the reaction zone.
3. The process arrangement according to claim 2, wherein a plurality of stirring devices are provided in the reaction zone.
4. A treatment plant according to claim 3, characterized in that said stirring means comprise a stirring rod; the stirring rod is provided with a plurality of groups of stirring blades.
5. A treatment plant according to any of claims 1-4, characterized in that the first and second feed pipes are mounted at the bottom position of the trough wall.
6. The processing apparatus according to claim 5, wherein the feeding direction of the first feeding pipe and the feeding direction of the second feeding pipe are substantially opposite.
7. A treatment plant according to claim 6, characterized in that a number of discharge openings are provided at the top position of the partition plate.
8. The processing apparatus as claimed in claim 7, wherein a plurality of buffer plates are disposed in the buffer area, the buffer plates including a fixed end connected to the wall portion of the tank, and an open end opposite to the fixed end, the open end being spaced apart from the wall portion of the tank by a predetermined distance.
9. The processing apparatus according to claim 8, wherein a plurality of the buffer plates are arranged in parallel, and fixed ends of adjacent buffer plates are oppositely arranged.
10. The method for treating the titanium white wastewater by using the treatment equipment as claimed in any one of claims 1 to 9, comprising the steps of feeding a reaction material containing metal smelting waste residue powder and the titanium white wastewater into a reaction zone of the reaction tank, reacting the reaction material and the titanium white wastewater through the reaction zone and a buffer zone in sequence under an oxygen-containing condition to obtain treatment slurry, then carrying out filter pressing treatment, and separating to obtain treatment water and a treatment material.
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