CN112939093A - A spent acid integrated processing device for titanium white powder production - Google Patents
A spent acid integrated processing device for titanium white powder production Download PDFInfo
- Publication number
- CN112939093A CN112939093A CN202110345309.4A CN202110345309A CN112939093A CN 112939093 A CN112939093 A CN 112939093A CN 202110345309 A CN202110345309 A CN 202110345309A CN 112939093 A CN112939093 A CN 112939093A
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- China
- Prior art keywords
- reaction kettle
- communicated
- pipeline
- cooler
- evaporator
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000002253 acid Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 235000010215 titanium dioxide Nutrition 0.000 title description 17
- 239000000843 powder Substances 0.000 title description 2
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 20
- 239000002699 waste material Substances 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 238000001704 evaporation Methods 0.000 claims abstract description 10
- 230000008020 evaporation Effects 0.000 claims abstract description 10
- 239000011552 falling film Substances 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000010306 acid treatment Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 16
- 229910000359 iron(II) sulfate Inorganic materials 0.000 abstract description 6
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 abstract description 5
- 229910000360 iron(III) sulfate Inorganic materials 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 4
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 235000003891 ferrous sulphate Nutrition 0.000 description 4
- 239000011790 ferrous sulphate Substances 0.000 description 4
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 4
- 238000000926 separation method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003674 animal food additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- XBDUTCVQJHJTQZ-UHFFFAOYSA-L iron(2+) sulfate monohydrate Chemical compound O.[Fe+2].[O-]S([O-])(=O)=O XBDUTCVQJHJTQZ-UHFFFAOYSA-L 0.000 description 1
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/14—Sulfates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A comprehensive waste acid treatment device for titanium dioxide production comprises an ortho-acid storage tank, a grid pool, a reaction kettle, a cooler and a falling film evaporation component; one side of the ortho-acid storage tank is provided with a first overflow port which is communicated with a liquid inlet on the side wall of the bottom of the grid pool through a liquid inlet pipeline, and the grid pool is internally provided with a plurality of layers of filter layers; a stirring device is arranged in the reaction kettle, a first filter plate is arranged at the bottom in the reaction kettle, the falling film evaporation assembly comprises an evaporator, a condenser and a collecting tank, a concentrated solution outlet is arranged at the bottom of the evaporator, and a steam outlet is arranged on the side wall of the evaporator; the concentrated solution outlet is also communicated to a pipeline between the cooler and the electric heater through a pipeline; the front end of the device is provided with the grating tank and the multi-layer filter layers, so that solid impurity particles, metatitanic acid and other impurities in the waste acid are intercepted, and iron powder can be metered and added, so that residual Fe in the waste acid can be removed3+Oxidation to Fe2+While reacting with sulfuric acid to form FeSO4The concentration of ferric sulfate in the system is increased, and the subsequent crystallization of ferric sulfate is facilitated.
Description
Technical Field
The invention relates to the technical field of waste acid recovery, in particular to a waste acid comprehensive treatment device for titanium dioxide production.
Background
With the continuous development of the economy of China, the demand on titanium dioxide is continuously increased, the capacity of the titanium dioxide in China accounts for about 30 percent of the world, and the titanium dioxide is the largest titanium dioxide producing country in the world, and simultaneously, the titanium dioxide is the largest titanium dioxide consuming country in the world, and the titanium dioxide industry in the world is led to be run with absolute advantages.
At present, the production process of titanium dioxide is mainly a sulfuric acid method, the main raw materials are ilmenite/acid-soluble high titanium slag and sulfuric acid, the production technology is mature, but a large amount of waste acid liquor can be generated, about 5 tons of waste acid can be generated when each 1 ton of titanium dioxide is produced, and the waste acid contains 10% of ferrous sulfate and is difficult to recycle; at present, the common treatment mode of waste acid is to use alkaline substances such as lime, carbide slag and the like to neutralize, the treatment mode can generate a large amount of calcium mud, needs to be stacked on site, brings influence to the environment, increases the environmental protection pressure and treatment cost of titanium dioxide enterprises, and the treatment method of the titanium white waste acid at present also comprises a concentration method which comprises the steps of concentration and solid-liquid separation. The solid-liquid separation effect in the existing concentration method is poor, the separated ferrous sulfate monohydrate cannot be recycled, meanwhile, the ferrous sulfate is widely applied to the feed industry, feed-grade ferrous sulfate is a feed additive, but when the content of the ferrous sulfate in sulfuric acid is low, crystallization from the sulfuric acid is difficult, and the subsequent sulfuric acid concentration process is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the existing defects and provides a waste acid comprehensive treatment device for titanium dioxide production, which comprises an ortho acid storage tank, a grid pool, a reaction kettle, a cooler and a falling film evaporation component which are communicated with each other; a first overflow port is arranged on one side of the ortho-acid storage tank, the first overflow port is communicated with a liquid inlet positioned on the side wall of the bottom of the grid pool through a liquid inlet pipeline, a plurality of layers of filter layers are arranged in the grid pool, the liquid inlet is positioned below the lowest filter layer, a second overflow port is arranged on the side wall of the top of the grid, and the second overflow port is positioned above the uppermost filter layer;
the reaction kettle comprises a kettle cover, a stirring device is arranged in the reaction kettle, the stirring device comprises a stirring shaft arranged in the reaction kettle, and the stirring shaft extends upwards and extends out of the stirring device and is in transmission connection with a driving motor; the bottom in the reaction kettle is provided with a first filter plate, and the bottom of the reaction kettle is provided with a liquid outlet pipeline;
the liquid outlet pipeline is communicated with a liquid inlet of the cooler; the falling film evaporation assembly comprises an evaporator, a condenser and a collecting tank, wherein a liquid outlet in the side wall of the top of the cooler is communicated with a feed inlet above the evaporator through an electric heater, a concentrated liquid outlet is formed in the bottom of the evaporator, and a steam outlet is formed in the side wall of the evaporator; the concentrated solution outlet is communicated to a pipeline between the cooler and the electric heater through a pipeline, and the steam outlet is communicated with the condenser and the collecting tank through pipelines in sequence.
In the technical scheme, the filtering layer is provided with 2-5 layers, the filtering material is filled in the filtering layer, and the grain size distribution of the filtering material passing through the filtering layer from top to bottom is increased in sequence.
In the above technical scheme, a valve is arranged on the liquid outlet pipeline.
In the above technical scheme, the bottom of the cooler is provided with the second filter plate.
In the technical scheme, the reaction kettle is communicated with an iron powder metering tank through a kettle cover.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the grid pond is arranged at the front end of the device, the multi-layer filter layers are arranged, solid impurity particles, metatitanic acid and other impurities in the waste acid are intercepted, and meanwhile, iron powder can be metered and added into the reaction kettle, so that residual Fe in the waste acid can be removed3+Oxidation to Fe2+While reacting with sulfuric acid to form FeSO4The concentration of ferric sulfate in the system is increased, so that the subsequent crystallization of ferric sulfate is facilitated, and the ferric sulfate is almost completely crystallized from the sulfuric acid system;
(2) the falling film evaporation assembly is arranged, the concentrated solution is repeatedly concentrated through the evaporator for many times until the required concentration is reached, and meanwhile, the process water collected in the collecting tank can be transferred to other procedures for production.
Drawings
FIG. 1 is a schematic structural diagram of a waste acid comprehensive treatment device for titanium dioxide production in the invention;
in the figure, 1-ortho-acid storage tank, 11-first overflow port, 2-grid pool, 21-liquid inlet, 22-filter layer, 23-second overflow port, 3-reaction kettle, 31-kettle cover, 32-stirring device, 321-stirring shaft, 322-driving motor, 33-first filter plate, 34-liquid outlet pipeline, 341-valve, 35-iron powder metering tank, 4-cooler, 41-second filter plate, 5-falling film evaporation component, 51-evaporator, 511-concentrated liquid outlet, 512-steam outlet, 52-condenser, 53-collecting tank and 6-electric heater.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the invention provides a comprehensive waste acid treatment device for titanium dioxide production, which comprises an ortho acid storage tank 1, a grid pool 2, a reaction kettle 3, a cooler 4 and a falling film evaporation component 5 which are communicated with each other; a first overflow port 11 is arranged on one side of the ortho-acid storage tank 1, the first overflow port 11 is communicated with a liquid inlet 21 positioned on the side wall of the bottom of the grid pool 2 through a liquid inlet pipeline, a plurality of layers of filter layers 22 are arranged in the grid pool 2, the position of the liquid inlet 21 is positioned below the lowest filter layer, a second overflow port 23 is arranged on the side wall of the top of the grid, and the position of the second overflow port 23 is positioned above the uppermost filter layer;
the reaction kettle 3 comprises a kettle cover 31, a stirring device 32 is arranged in the reaction kettle, the stirring device 32 comprises a stirring shaft 321 arranged in the reaction kettle, and the stirring shaft 321 extends upwards and extends out of the stirring device and is connected with a driving motor 322 in a transmission manner; the bottom in the reaction kettle 3 is provided with a first filter plate 33, and the bottom of the reaction kettle is provided with a liquid outlet pipeline 34;
the liquid outlet pipeline 34 is communicated with a liquid inlet of the cooler 4; the falling film evaporation assembly 5 comprises an evaporator 51, a condenser 52 and a collecting tank 53, a liquid outlet on the side wall of the top of the cooler 4 is communicated with a feed inlet above the evaporator 51 through an electric heater 6, the bottom of the evaporator 51 is provided with a concentrated liquid outlet 511, and the side wall is provided with a steam outlet 512; the concentrated solution outlet 511 is also communicated to a pipeline between the cooler 4 and the electric heater 6 through a pipeline, and the steam outlet 512 is communicated with the condenser 52 and the collecting tank 53 through pipelines in sequence.
Preferably, the filtering layer 22 is provided with 2-5 layers, filtering materials are filled in the filtering layer, and the grain size distribution of the filtering materials passing through the filtering layer from top to bottom is sequentially increased.
Preferably, a valve 341 is arranged on the liquid outlet pipe 34.
Preferably, the bottom of the cooler 4 is provided with a second filter plate 41.
Preferably, the reaction kettle 3 is communicated with an iron powder metering tank 35 through a kettle cover 31.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A waste acid comprehensive treatment device for titanium dioxide production is characterized by comprising an ortho acid storage tank, a grid pool, a reaction kettle, a cooler and a falling film evaporation component which are communicated with each other; a first overflow port is arranged on one side of the ortho-acid storage tank, the first overflow port is communicated with a liquid inlet positioned on the side wall of the bottom of the grid pool through a liquid inlet pipeline, a plurality of layers of filter layers are arranged in the grid pool, the liquid inlet is positioned below the lowest filter layer, a second overflow port is arranged on the side wall of the top of the grid, and the second overflow port is positioned above the uppermost filter layer;
the reaction kettle comprises a kettle cover, a stirring device is arranged in the reaction kettle, the stirring device comprises a stirring shaft arranged in the reaction kettle, and the stirring shaft extends upwards and extends out of the stirring device and is in transmission connection with a driving motor; the bottom in the reaction kettle is provided with a first filter plate, and the bottom of the reaction kettle is provided with a liquid outlet pipeline;
the liquid outlet pipeline is communicated with a liquid inlet of the cooler; the falling film evaporation assembly comprises an evaporator, a condenser and a collecting tank, wherein a liquid outlet in the side wall of the top of the cooler is communicated with a feed inlet above the evaporator through an electric heater, a concentrated liquid outlet is formed in the bottom of the evaporator, and a steam outlet is formed in the side wall of the evaporator; the concentrated solution outlet is communicated to a pipeline between the cooler and the electric heater through a pipeline, and the steam outlet is communicated with the condenser and the collecting tank through pipelines in sequence.
2. A comprehensive waste acid treatment device for titanium dioxide production as claimed in claim 1, wherein the filter layer is provided with 2-5 layers, the filter layer is filled with filter materials, and the grain size distribution of the filter materials passing through the filter layer from top to bottom is increased in sequence.
3. A waste acid comprehensive treatment device for titanium dioxide production according to claim 1, wherein a valve is arranged on the liquid outlet pipeline.
4. A waste acid comprehensive treatment device for titanium dioxide production according to claim 1, wherein the bottom of the cooler is provided with a second filter plate.
5. The comprehensive waste acid treatment device for titanium dioxide production according to claim 1, wherein the reaction kettle is communicated with an iron powder metering tank through a kettle cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110345309.4A CN112939093B (en) | 2021-03-31 | 2021-03-31 | Comprehensive waste acid treatment device for titanium dioxide production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110345309.4A CN112939093B (en) | 2021-03-31 | 2021-03-31 | Comprehensive waste acid treatment device for titanium dioxide production |
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| Publication Number | Publication Date |
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| CN112939093A true CN112939093A (en) | 2021-06-11 |
| CN112939093B CN112939093B (en) | 2024-05-24 |
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| CN202110345309.4A Active CN112939093B (en) | 2021-03-31 | 2021-03-31 | Comprehensive waste acid treatment device for titanium dioxide production |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210855657U (en) * | 2019-09-27 | 2020-06-26 | 广东中耀环境科技有限公司 | Waste liquid treatment device |
| CN111517553A (en) * | 2020-04-30 | 2020-08-11 | 杭州上拓环境科技股份有限公司 | Titanium dioxide washing wastewater resource utilization treatment process |
| CN111661966A (en) * | 2020-05-15 | 2020-09-15 | 杭州上拓环境科技股份有限公司 | Titanium dioxide hydrolysis waste acid resource utilization treatment process |
| CN212559466U (en) * | 2020-05-15 | 2021-02-19 | 杭州上拓环境科技股份有限公司 | Titanium white powder hydrolysis waste acid resource utilization processing system |
| CN212559823U (en) * | 2020-04-30 | 2021-02-19 | 杭州上拓环境科技股份有限公司 | Titanium white powder washing wastewater resource utilization processing system |
| CN215516666U (en) * | 2021-03-31 | 2022-01-14 | 江苏镇钛化工有限公司 | A spent acid integrated processing device for titanium white powder production |
-
2021
- 2021-03-31 CN CN202110345309.4A patent/CN112939093B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210855657U (en) * | 2019-09-27 | 2020-06-26 | 广东中耀环境科技有限公司 | Waste liquid treatment device |
| CN111517553A (en) * | 2020-04-30 | 2020-08-11 | 杭州上拓环境科技股份有限公司 | Titanium dioxide washing wastewater resource utilization treatment process |
| CN212559823U (en) * | 2020-04-30 | 2021-02-19 | 杭州上拓环境科技股份有限公司 | Titanium white powder washing wastewater resource utilization processing system |
| CN111661966A (en) * | 2020-05-15 | 2020-09-15 | 杭州上拓环境科技股份有限公司 | Titanium dioxide hydrolysis waste acid resource utilization treatment process |
| CN212559466U (en) * | 2020-05-15 | 2021-02-19 | 杭州上拓环境科技股份有限公司 | Titanium white powder hydrolysis waste acid resource utilization processing system |
| CN215516666U (en) * | 2021-03-31 | 2022-01-14 | 江苏镇钛化工有限公司 | A spent acid integrated processing device for titanium white powder production |
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| Publication number | Publication date |
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| CN112939093B (en) | 2024-05-24 |
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