CN203360022U - Oxidative desulfurization device for production of aluminum oxide - Google Patents
Oxidative desulfurization device for production of aluminum oxide Download PDFInfo
- Publication number
- CN203360022U CN203360022U CN 201320406817 CN201320406817U CN203360022U CN 203360022 U CN203360022 U CN 203360022U CN 201320406817 CN201320406817 CN 201320406817 CN 201320406817 U CN201320406817 U CN 201320406817U CN 203360022 U CN203360022 U CN 203360022U
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- oxygen
- cell body
- mixing machine
- alumina producing
- gas liquid
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Abstract
The utility model provides an oxidative desulfurization device for production of aluminum oxide and relates to a low-pressure oxidative desulfurization device for production of aluminum oxide with a high sulfur bauxite Bayer method. The oxidative desulfurization device is characterized by structurally comprising a reaction tank body, an inbuilt mixing barrel, a Venturi gas liquid mixer and a gas liquid mixing pump, wherein the reaction tank body is provided with a stirring shaft driven by a motor and stirring blades; the inbuilt mixing barrel is positioned in the central position of the reaction tank body; the feeding end of the Venturi gas liquid mixer is connected with a last evaporator dissolving pulp discharge pipe and an oxygen supply pipe respectively; a material pipe at the discharging end of the Venturi gas liquid mixer penetrates through the reaction tank body and enters the inbuilt mixing barrel; the feeding end of the gas liquid mixing pump is connected with a liquid washing pipe and the oxygen supply pipe respectively; a material pipe at the discharging end of the gas liquid mixing pump penetrates through the reaction tank body and enters the inbuilt mixing barrel; and the gas liquid mixing pump is controlled by a central controller. The oxidative desulfurization device is particularly applicable to an oxidative desulfurization process for production of the aluminum oxide, for oxidatively removing S<2-> in Bayer method diluted pulp, and has good desulfurization effect and high utilization ratio of oxygen.
Description
Technical field
A kind of alumina producing oxidation sweetening device, relate to a kind of low-pressure oxidized desulfurizer for the high-sulfur bauxite alumina producing Bayer process.
Background technology
China's diaspore type high-sulfur bauxite reserves are abundant, under the current techniques condition, utilize the high-sulfur ore deposit to produce the technical difficulty of aluminum oxide larger: the sulphur in ore at process in leaching mainly with S
2-form enters solution, not only accelerates equipment corrosion speed, brings potential safety hazard, and can make the iron level in the product aluminum oxide exceed standard.
Sulfur method in aluminum oxide production process mainly contains two kinds at present: a kind of is to add zinc oxide to make the S in solution
2-become ZnS and discharge from flow process, another kind is to pass into air to make S
2-be oxidized to Na
2sO
4, by the method for evaporative crystallization, from flow process, discharge.Because the price of ZnO is high, the cost that therefore adds the ZnO desulfurization is higher.While passing into the atmospheric oxidation desulfurization, because content of oxygen in air is lower, thereby discharge amount of exhaust gas causes the thermosteresis of oxidation sweetening larger greatly.The more important thing is when passing into air sweetening S
2-be easy to be oxidized to Na
2s
2o
3, and Na
2s
2o
3not only very strong to the corrodibility of production unit, and be oxidised with air to Na
2sO
4reaction speed very slow.
Summary of the invention
The purpose of this utility model is exactly for a kind of S be specially adapted in oxidation removal Bayer process dilution slurries is provided
2-with alumina producing oxidation sweetening device.
Above-mentioned purpose realizes by following proposal.
A kind of alumina producing oxidation sweetening device is characterized in that structure comprises:
The reaction cell body, this cell body is a pot type cell body, in cell body, be provided with by motor-driven stir shaft and be fixed on stir shaft, be positioned at the reaction cell body bottom the stirring blade;
Built-in mixing machine, this mixing machine is the circular cylinder body that is positioned at reaction cell body central position, its circular cylinder body top seal, bottom opening, stir shaft passes from built-in mixing machine axle center;
The Venturi gas liquid mixer, this mixing tank feed end connects with last vaporizer stripping slurry drainage conduit and oxygen air-supply duct respectively, and discharge end material pipe is through reacting the cell body groove, entering built-in mixing machine;
Gas-liquid mixing pump, this mixing pump feed end washes pipe with liquid respectively and the oxygen air-supply duct connects, and discharge end material pipe is through reacting the cell body groove, entering built-in mixing machine.
A kind of alumina producing oxidation sweetening device of the present utility model, is characterized in that being provided with oxygen flow meter, Electromagnetic Flow variable valve, oxygen check valve on Venturi gas liquid mixer and oxygen air-supply duct duct coupling.
A kind of alumina producing oxidation sweetening device of the present utility model, is characterized in that being provided with oxygen flow meter, Electromagnetic Flow variable valve, oxygen check valve on gas-liquid mixing pump and oxygen air-supply duct duct coupling.
A kind of alumina producing oxidation sweetening device of the present utility model, is characterized in that, at reaction cell body upper top, aiutage is installed, and high quick oxygen concentration sensor is installed at the middle part of aiutage.
A kind of alumina producing oxidation sweetening device of the present utility model, is characterized in that described oxygen flow meter, Electromagnetic Flow variable valve, oxygen check valve and Gao Min oxygen concentration sensor connect with a central control unit.
A kind of alumina producing oxidation sweetening device of the present utility model, is characterized in that described agitating vane has two-layer, and upper strata is the oblique leaf turbine impeller of upper pushing-type, lower floor on turn over axial flow type agitating valve.
A kind of alumina producing oxidation sweetening device of the present utility model, is characterized in that the distance between described built-in mixing machine bottom opening and upper strata agitating vane is 3.0～20cm.
A kind of alumina producing oxidation sweetening device of the present utility model, it is characterized in that the stripping slurry that is mixed with oxygen that described built-in mixing machine enters and washing lotion relative the entering of flow velocity with 1.8～5.0m/S from tangential direction respectively on sustained height, and impact on agitating vane with the flow velocity of 1.7～4.5m/S downwards from the mixing machine bottom opening.
A kind of alumina producing oxidation sweetening device of the present utility model, be specially adapted to the S in oxidation removal Bayer process dilution slurries
2-by alumina producing oxidation sweetening process, in the Bayer Process digestion slurries, caustic sodium concentration Nk is 100～300g/L, Gu contain, is 60～300g/L, S in solution
2-content be 0.5～6.0g/L, 80 ~ 110 ℃ of temperature, reaction times 5～90min, 75～98% S in the dilution slurries
2-be oxidized to Na
2sO
4, oxygen utilization rate is not less than 85%.In the Bayer stripping slurries that are applicable to process, caustic sodium concentration Nk is 100 ~ 300g/L, and solids content is 60 ~ 300 g/L, and temperature is 80 ~ 110 ℃.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is built-in mixing machine feeding structure schematic top plan view.
Embodiment
A kind of alumina producing oxidation sweetening device, structure comprises:
Built-in mixing machine 5, this mixing machine is the circular cylinder body that is positioned at reaction cell body central position, its circular cylinder body top seal, bottom opening, stir shaft passes from built-in mixing machine axle center;
Venturi gas liquid mixer 6, this mixing tank feed end connects with last vaporizer stripping slurry drainage conduit 7 and oxygen air-supply duct 8 respectively, and discharge end material pipe is through reacting the cell body groove, entering built-in mixing machine;
Gas-liquid mixing pump 9, this mixing pump feed end washes pipe with liquid respectively and the oxygen air-supply duct connects, and discharge end material pipe is through reacting the cell body groove, entering built-in mixing machine.
A kind of alumina producing oxidation sweetening device of the present utility model, it is provided with oxygen flow meter 10, Electromagnetic Flow variable valve 11, oxygen check valve 12 on Venturi gas liquid mixer and oxygen air-supply duct duct coupling.
A kind of alumina producing oxidation sweetening device of the present utility model is provided with oxygen flow meter 13, Electromagnetic Flow variable valve 14, oxygen check valve 15 on gas-liquid mixing pump and oxygen air-supply duct duct coupling.
A kind of alumina producing oxidation sweetening device of the present utility model, be equipped with aiutage 16 at reaction cell body upper top, and high quick oxygen concentration sensor 17 is installed at the middle part of aiutage.
A kind of alumina producing oxidation sweetening device of the present utility model, described oxygen flow meter, Electromagnetic Flow variable valve, oxygen check valve and Gao Min oxygen concentration sensor connect with a central control unit 18.
A kind of alumina producing oxidation sweetening device of the present utility model, is characterized in that described agitating vane has two-layer, and upper strata is the oblique leaf turbine impeller of upper pushing-type, lower floor on turn over axial flow type agitating valve.
A kind of alumina producing oxidation sweetening device of the present utility model, is characterized in that the distance between described built-in mixing machine bottom opening and upper strata agitating vane is 3～20cm.
A kind of alumina producing oxidation sweetening device of the present utility model, the stripping slurry that is mixed with oxygen that described built-in mixing machine enters and washing lotion relative the entering of flow velocity with 1.8～5.0m/S from tangential direction respectively on sustained height, and with the flow velocity of 1.7～4.5m/S, impact on agitating vane downwards from the mixing machine bottom opening.
During operation, washing lotion through gas-liquid mixing pump with enter in the built-in mixing machine in reactive tank after part of oxygen is mixed; As shown in Figure 2, the stripping slurry that is mixed with oxygen and washing lotion enter built-in mixing machine from tangential direction is relative respectively on sustained height, and then rotation mixes and flows downward, and from built-in coagulation barrel bottom, enters in the reaction cell body.Enter at oxygen on the pipeline of described gas-liquid mixed pump suction pipe Electromagnetic Flow variable valve, under meter and oxygen check valve are installed successively; The top of described reaction cell body is equipped with agitator motor; By the central control unit be equipped with, carry out online signal reception, process oxygen flow and concentration signal, and send instruction, carry out corresponding actions to oxygen house steward stopping valve 19 and oxygen flow rate adjusting valve.
The utility model, by improving feeding manner, has realized that the oxygen multiple spot has added, repeatedly mixes, strengthened the effect of oxygen mix and mass transfer: high-concentration oxygen can add from Venturi gas liquid mixer and the tail pipe of the gas-liquid mixing pump of carrying washing lotion simultaneously; The stripping slurry that is mixed with oxygen enters the dilution mixing drum from relative tangential direction with washing lotion respectively on sustained height, and rotation mixes, moves downward; The dilution slurries of discharging from the lower openings of built-in mixing machine impact downwards on the high-speed stirring blade with the speed of 1.8～5.0m/S, again the mixing of enriched with oxygen and slip with contact effect.
Claims (8)
1. an alumina producing oxidation sweetening device is characterized in that structure comprises:
The reaction cell body, this cell body is a pot type cell body, in cell body, be provided with by motor-driven stir shaft and be fixed on stir shaft, be positioned at the reaction cell body bottom the stirring blade;
Built-in mixing machine, this mixing machine is the circular cylinder body that is positioned at reaction cell body central position, its circular cylinder body top seal, bottom opening, stir shaft passes from built-in mixing machine axle center;
The Venturi gas liquid mixer, this mixing tank feed end connects with last vaporizer stripping slurry drainage conduit and oxygen air-supply duct respectively, and discharge end material pipe is through reacting the cell body groove, entering built-in mixing machine;
Gas-liquid mixing pump, this mixing pump feed end washes pipe with liquid respectively and the oxygen air-supply duct connects, and discharge end material pipe is through reacting the cell body groove, entering built-in mixing machine.
2. a kind of alumina producing oxidation sweetening device according to claim 1, is characterized in that being provided with oxygen flow meter, Electromagnetic Flow variable valve, oxygen check valve on Venturi gas liquid mixer and oxygen air-supply duct duct coupling.
3. a kind of alumina producing oxidation sweetening device according to claim 1, is characterized in that being provided with oxygen flow meter, Electromagnetic Flow variable valve, oxygen check valve on gas-liquid mixing pump and oxygen air-supply duct duct coupling.
4. a kind of alumina producing oxidation sweetening device according to claim 1, is characterized in that, at reaction cell body upper top, aiutage is installed, and high quick oxygen concentration sensor is installed at the middle part of aiutage.
5. a kind of alumina producing oxidation sweetening device according to claim 1, is characterized in that described oxygen flow meter, Electromagnetic Flow variable valve, oxygen check valve and Gao Min oxygen concentration sensor connect with a central control unit.
6. a kind of alumina producing oxidation sweetening device according to claim 1, is characterized in that described agitating vane has two-layer, and upper strata is the oblique leaf turbine impeller of upper pushing-type, lower floor on turn over axial flow type agitating valve.
7. a kind of alumina producing oxidation sweetening device according to claim 1, is characterized in that the distance between described built-in mixing machine bottom opening and upper strata agitating vane is 3～20cm.
8. a kind of alumina producing oxidation sweetening device according to claim 1, it is characterized in that the stripping slurry that is mixed with oxygen that described built-in mixing machine enters and washing lotion relative the entering of flow velocity with 1.80～5.0m/S from tangential direction respectively on sustained height, and impact on agitating vane with the flow velocity of 1.7～4.5m/S downwards from the mixing machine bottom opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320406817 CN203360022U (en) | 2013-07-10 | 2013-07-10 | Oxidative desulfurization device for production of aluminum oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320406817 CN203360022U (en) | 2013-07-10 | 2013-07-10 | Oxidative desulfurization device for production of aluminum oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203360022U true CN203360022U (en) | 2013-12-25 |
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ID=49807815
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320406817 Expired - Lifetime CN203360022U (en) | 2013-07-10 | 2013-07-10 | Oxidative desulfurization device for production of aluminum oxide |
Country Status (1)
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|---|---|
| CN (1) | CN203360022U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299460A (en) * | 2020-10-27 | 2021-02-02 | 中国铝业股份有限公司 | Method for synergistically and efficiently oxidizing sulfur and organic matters in bauxite leaching slurry |
-
2013
- 2013-07-10 CN CN 201320406817 patent/CN203360022U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299460A (en) * | 2020-10-27 | 2021-02-02 | 中国铝业股份有限公司 | Method for synergistically and efficiently oxidizing sulfur and organic matters in bauxite leaching slurry |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |
|
| CX01 | Expiry of patent term |