CN101913692B - Method for processing titanium dioxide acid waste water and neutralization bucket - Google Patents
Method for processing titanium dioxide acid waste water and neutralization bucket Download PDFInfo
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- CN101913692B CN101913692B CN2010102554102A CN201010255410A CN101913692B CN 101913692 B CN101913692 B CN 101913692B CN 2010102554102 A CN2010102554102 A CN 2010102554102A CN 201010255410 A CN201010255410 A CN 201010255410A CN 101913692 B CN101913692 B CN 101913692B
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Abstract
The invention relates to a method for processing titanium dioxide acid waste water and a neutralization bucket used same, which can effectively shorten the neutralization time and lead the neutralization reaction to be complete. The method for processing the titanium dioxide acid waste water comprises the following steps of: mixing alkali emulsified fluid with acid waste water to carry out the neutralization reaction under the mixing state in the neutralization bucket, wherein the neutralization bucket is internally provided with a stirring bar and 3-5 flow baffles arranged along the inner side of the neutralization bucket wall, and the seal connections are adopted between both sides of each flow baffle and the bucket wall of the neutralization bucket and between the bottom of each flow baffle and the bucket bottom of the neutralization bucket. In the invention, the neutralization treatment of the acid waste water is carried out by using the mechanically stirring neutralization bucket, and the flow baffles are arranged in the neutralization bucket, therefore, the stirring dead corners are basically eliminated; the neutralization process is even, the neutralization speed is quick, the neutralization reaction is completed, and the iron content in the waste water can be effectively reduced to 20-25ppm without aerating, thus, the invention reduces the device investment and the costs of repair and maintenance.
Description
Technical field
The present invention relates to a kind of method and neutralization bucket of handling titanium dioxide acid waste water.
Background technology
Titanium oxide is a kind of important chemical material, has all obtained widely using in every field, and suitability for industrialized production has two kinds of methods at present: sulfuric acid process and chlorination.The production technique of present domestic white titanium pigment remains sulfuric acid process and takes as the leading factor; The Production Flow Chart of sulfuric acid process is long; Three wastes discharge amount is big; One ton of white titanium pigment of every production can produce the spent acid 7-10 ton about 20%, 30～50 tons of about 1～2% acid waste waters, and obvious as influence that deal with improperly environment is very serious.Account for the sewage disposal device of gross investment 10～20% if handle then need start, and working cost reaches 600～1000 yuans of/ton titanium whites.The last century Mo and the beginning of this century be domestic, abroad some sulfuric acid method titanium pigment factories be exactly because spent acid and waste water deal with improperly or processing costs too high, therefore have to close or change the line of production.The treatment process of at present general sulfuric acid method titanium pigment factory is: 1. generally reuse after concentrating of spent acid, but spissated investment of spent acid and running cost are than higher; 2. and acid waste water is mainly produced by washing step, characteristics are that the acidity fluctuation is big, and flow is big, and treatment process is that unslaked lime or carbide slag are digested to emulsion.To be neutralized to pH value qualified with sour water then, produces calcium sulfate precipitation.Owing to contain a certain amount of iron ion in the waste water; And the solvability that obtains ferrous hydroxide that neutralizes is omited height than the hydroxide three-iron, if neutralization reaction is incomplete, adds water-soluble ferrous hydroxide; Residual iron ion content is too high in the waste water; Therefore can make waste water rubescent, also need quick-friedly to go into pressurized air ferrous hydroxide is oxidized to the hydroxide three-iron of reddish-brown, carry out GYPSUM RUBRUM with solid-liquid separating equipment at last and (contain Fe (OH)
3Calcium sulfate) with water separate qualified water reuse or qualified discharge.National standard: pH value 6～9, COD100 * 10
-6Below, below the suspended substance 70mg/l.
The investment of traditional spent acid and sewage treatment equipment is big, and working cost is high, and occupation area of equipment is big, and neutralization, quick-fried gas time are long, and the expense of WWT can't be born at all by the factory of small scale.
Summary of the invention
The present invention provides a kind of method of handling titanium dioxide acid waste water, in can effectively shortening and the time, makes neutralization reaction complete.
The present invention also provides the neutralization bucket that uses in the aforesaid method.
The method of said processing titanium dioxide acid waste water does, in neutralization bucket, under the whipped state; Alkaline emulsion is mixed with acid waste water; Carry out neutralization reaction, said neutralization bucket comprises staving, is provided with stirring rod and 3～5 flow-stopping plates along the inboard setting of staving bucket wall in the staving; Between the both sides of each flow-stopping plate and the staving bucket wall, and be between at the bottom of the bottom of flow-stopping plate and the staving bucket and be tightly connected.
As preferred version of the present invention, said flow-stopping plate is along the circumferential uniform distribution of staving bucket wall, and each flow-stopping plate is that 70～90 ° panel is formed by two angles.
Said alkaline emulsion is that mass percent concentration is 10～20% lime powder emulsion, and the endpoint pH of neutralization reaction is 8.0～9.0.
The neutralization bucket that uses in the aforesaid method comprises staving, is provided with stirring rod and 3～5 in the staving along the inboard flow-stopping plates that are provided with of staving bucket wall, between the both sides of each flow-stopping plate and the staving bucket wall, is between reaching at the bottom of bottom and the staving bucket of flow-stopping plate and is tightly connected.As preferred version, said flow-stopping plate is along the circumferential uniform distribution of staving bucket wall, and each flow-stopping plate is that 70 °～90 ° panel is formed by two angles.
The present invention adopts churned mechanically neutralization bucket to carry out the neutralizing treatment of acid waste water; Basically solved the stirring dead angle after installing flow-stopping plate in the neutralization bucket additional, N-process is even, in speed fast; Neutralization reaction is complete; Need not aeration, can effectively reduce iron level in the waste water to 20-25ppm, thus reduction equipment input, maintenance and cost of upkeep.
Concrete operation steps is: 1. lime powder making beating, and generally lime powder is put into the beater tup that has added water and pull an oar into 10～20% lime slurry, stirred 20～30 minutes, subsequent use.2. detect the sulfuric acid concentration of waste water earlier, calculate the dosage of sour water and lime slurry, under whipped state, pump into neutralization bucket, when pumping into waste water, pump into lime slurry with impeller pump.General waste water pumps into 70～75M
3After, termination of pumping with the pH value of PH detection paper corrective, is carried out the fine setting of pH value with lime slurry, and PH is 8.0～9.0 in control.Continue to stir, treat suspension liquid PH after stable then be in and terminal point, pump into plate-and-frame filter press then and carry out solid-liquid separation, discharged wastewater met the national standard, gypsum export trade.
The cycle of aforesaid operations is generally at 1.5～2.0 hours, large increase usage ratio of equipment.And the former processing cycle was at 3～5 hours.A 100M
3One day treatment capacity of neutralization bucket in (70～80) * 24 ÷ 2=840～960M
3, can handle 900M
3Sour water, and a factory that produces 30000 tons of white titanium pigments per year needs 6～8 of neutralization buckets.
Obtain white Fe (OH) in this N-process earlier
2Deposition, calcium sulfate precipitation, Fe (OH)
2With become sap green after surperficial air contacts, blending is at CaSO
4In the deposition.
The preferred lime powder (fineness requirement 90% is through 80 orders) of directly buying is pulled an oar, and the present invention can deduct the fossil ash process like this, and minimizing equipment and personnel drop into.
Description of drawings
Fig. 1 is the front view of neutralization bucket;
Fig. 2 is the A-A sectional view of Fig. 1.
Embodiment
Neutralization bucket is shown in Fig. 1-2, and this equipment monomer volume can be designed to 100M
3, comprising staving 1, staving 1 center is provided with stirring rod 3; Indoor design has 3 flow-stopping plates 2; Along the bucket wall 1 circumferential uniform distribution of staving, per 120 ° are designed flow-stopping plates 2, and each flow-stopping plate 2 is that 90 ° panel is formed by two angles; Between 1 barrel of wall of the both sides of each flow-stopping plate 2 and staving, and be between at the bottom of 1 barrel of the bottom of flow-stopping plate 2 and the staving and be tightly connected.The design of flow-stopping plate has increased mixing effect, and N-process does not have the dead angle.Like this in N-process, as long as better controlled terminal point pH value need not expose to the sun into the compressed air oxidation ferrous ion, the water that carries out after the solid-liquid separation can qualified discharge.
In following examples, it is 250m that the acid waste water pump is selected flow for use
3/ hour, it is 30m that milk of lime pump is selected flow for use
3/ hour.Milk of lime is obtained by the lime powder making beating, and lime powder fineness requirement 90% is through 80 orders, and the concentration of milk of lime is 14.8%.In said with churning time be meant from pump into waste water and milk of lime to and the churning time of terminal point.The result shows, 4 pots of embodiment 1-4 time service data is steady, during actual motion, in shorten greatly with the time, the time of reaching home is fast, plant factor has improved twice, has well reduced running cost and cost of investment.
Embodiment 4
Claims (1)
1. a method of handling titanium dioxide acid waste water is characterized in that, in neutralization bucket; Under the whipped state, alkaline emulsion is mixed with acid waste water, reaction generates calcium sulfate; Said neutralization bucket comprises staving; Be provided with stirring rod and 3～5 in the staving along the inboard flow-stopping plates that are provided with of staving bucket wall, between the both sides of each flow-stopping plate and the staving bucket wall, be between reaching at the bottom of bottom and the staving bucket of flow-stopping plate and be tightly connected; Said flow-stopping plate is along the circumferential uniform distribution of neutralization bucket bucket wall; The panel that each flow-stopping plate is 70 o～90o by two angles is formed, and said alkaline emulsion is that mass percent concentration is 10 ~ 20% lime powder emulsion, and the endpoint pH that reaction generates calcium sulfate is 8.0 ~ 9.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102554102A CN101913692B (en) | 2010-08-17 | 2010-08-17 | Method for processing titanium dioxide acid waste water and neutralization bucket |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102554102A CN101913692B (en) | 2010-08-17 | 2010-08-17 | Method for processing titanium dioxide acid waste water and neutralization bucket |
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| CN101913692A CN101913692A (en) | 2010-12-15 |
| CN101913692B true CN101913692B (en) | 2012-09-05 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102225818B (en) * | 2011-04-15 | 2012-12-12 | 四川省环保科技工程有限责任公司 | Technological process for toxicity elimination of extracted wastewater with high concentrated acid |
| JP5720665B2 (en) * | 2012-12-11 | 2015-05-20 | 住友金属鉱山株式会社 | Heavy metal removal method and heavy metal removal apparatus |
| CN113648693B (en) * | 2021-07-14 | 2022-12-27 | 安徽金星钛白（集团）有限公司 | Primary filter for preventing blockage during blanking of metatitanic acid storage tank |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050010A (en) * | 2006-04-03 | 2007-10-10 | 安徽安纳达钛业股份有限公司 | Method for treating acid wastewater of titanium white |
| CN201295986Y (en) * | 2008-10-24 | 2009-08-26 | 秦皇岛通联重工有限公司 | Bitumen cement mortar mixer |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050010A (en) * | 2006-04-03 | 2007-10-10 | 安徽安纳达钛业股份有限公司 | Method for treating acid wastewater of titanium white |
| CN201295986Y (en) * | 2008-10-24 | 2009-08-26 | 秦皇岛通联重工有限公司 | Bitumen cement mortar mixer |
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