CN211235213U - Dynamic and static combined stirring system - Google Patents
Dynamic and static combined stirring system Download PDFInfo
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- CN211235213U CN211235213U CN201922251226.XU CN201922251226U CN211235213U CN 211235213 U CN211235213 U CN 211235213U CN 201922251226 U CN201922251226 U CN 201922251226U CN 211235213 U CN211235213 U CN 211235213U
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Abstract
The utility model relates to a sound combination mixing system, including open-top's cell body with set up in the sealed lid of cell body opening part, sealed covering installs the agitator, and the (mixing) shaft of agitator is located the cell body, and stirring paddle leaf is installed to the bottom of (mixing) shaft, sealed covering fixed mounting has a plurality of static stirring rake, and is a plurality of static stirring rake is around the (mixing) shaft setting, and is a plurality of the one end that sealed lid was kept away from to static stirring rake is gone into the cell body deeply. The system is simple in structure and reasonable in design, and by arranging the plurality of static stirring paddles, the stable fluid rotating body formed under the stirring action of the stirrer is blocked, and the symmetry of the original stable flow field is destroyed, so that the fluid is rotated and shunted, and the fluid interface is unstable, the regulation and control of the fluid mixing process in the flow field are realized, and the purpose of strengthening the fluid mixing mass transfer is achieved.
Description
Technical Field
The utility model belongs to the technical field of hydrometallurgy and heterogeneous stirring reaction, concretely relates to sound combination mixing system.
Background
In industrial production, stirred tank reactors are widely applied in the fields of solid-liquid, gas-liquid-solid and other multiphase reaction engineering, and the intensive technical research on the mixing process of a reaction system is highly regarded by people.
The chromium salt industry is an important basic raw material industry crossed by chemical industry, materials and metallurgy, and plays an important role in national economy. The traditional chromium salt production process, especially the calcium roasting technology, is completely eliminated due to the low resource utilization rate and the generation of a large amount of toxic chromium slag containing Cr (VI). At present, the chromium slag amount generated by the most widely used calcium-free roasting process in China is greatly reduced, but the pollution problem of the chromium slag cannot be thoroughly solved. For this reason, the research and development of chromium salt clean production process technology has attracted high attention from all sides, and the chromite liquid-phase oxidation method is considered as the clean process with the most industrial application prospect. However, the following major technical problems still exist in the practical chromium salt production application: (1) in order to achieve high-efficiency chromium conversion rate, the alkali consumption is extremely high, the later recovery is difficult, and the process is complex; (2) the reaction system formed by the high-concentration alkali and the chromite with stable structure is complex, so that the conversion efficiency of chromium in the process is low, and the mass transfer process in the reaction system needs to be strengthened; (3) the method is limited by the equipment conditions of the pressurized stirring reaction tank in the current industrial production, and the flow field mixing regulation and control means are limited, so that the gas-liquid-solid three-phase mixing efficiency in the reaction system is lower. In order to solve the problems, people improve the structure of the stirring paddle in the stirring tank and add baffles and other forms on the edge of the stirring tank so as to achieve the purpose of strengthening the fluid mixing process. Meanwhile, the conversion rate of chromium is also improved by increasing the alkali concentration and prolonging the reaction time. The modes are different in equipment structure, and the realization method and the effect are different according to the thought of strengthening the gas-liquid-solid three-phase mass transfer efficiency. The utility model provides a fluid mixing's quiet combination mixing system that moves in the intensive stirring mixing tank to the problem that chromite liquid phase pressurization oxidation leaching process exists. The stirring system can obviously improve the chromium conversion rate in the chromite liquid-phase oxidation process, greatly reduce the reaction time and realize a fast and efficient chromium salt clean production mode.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, provide a sound combination mixing system. The system is simple in structure and reasonable in design, and by arranging the plurality of static stirring paddles, the stable fluid rotating body formed under the stirring action of the stirrer is blocked, and the symmetry of the original stable flow field is destroyed, so that the fluid is rotated and shunted, and the fluid interface is unstable, the regulation and control of the fluid mixing process in the flow field are realized, and the purpose of strengthening the fluid mixing mass transfer is achieved.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a sound combination mixing system, includes open-top's cell body and sets up in the sealed lid of cell body opening part, its characterized in that, sealed covering installs the agitator, and the (mixing) shaft of agitator is located the cell body, and stirring paddle leaf is installed to the bottom of (mixing) shaft, sealed covering fixed mounting has a plurality of static stirring rake, and is a plurality of static stirring rake is around the (mixing) shaft setting, and is a plurality of the one end that sealed lid was kept away from to static stirring rake is gone deeply into the cell body.
The dynamic and static combined stirring system is characterized in that the distances of the static stirring propeller pitch stirring shafts are different.
The dynamic and static combined stirring system is characterized in that the static stirring paddle is a lath-shaped stirring paddle, a cylindrical stirring paddle or a prismatic stirring paddle.
The dynamic and static combined stirring system is characterized in that the sealing cover is provided with a thermocouple.
The dynamic and static combined stirring system is characterized in that the lower end of the static stirring paddle is positioned above the stirring paddle.
The dynamic and static combined stirring system is characterized in that blades of the stirring blades are ellipsoidal.
The dynamic and static combined stirring system is characterized in that the sealing cover is provided with an air inlet and an air outlet, the air inlet is provided with an air inlet pipe, the air inlet pipe is deep into the tank body, the bottom of the air inlet pipe is close to the bottom of the tank body, and the top of the air inlet pipe is provided with an air inlet valve; an air outlet pipe is installed at the air outlet, and an air outlet valve is installed at the top of the air outlet pipe.
The dynamic and static combined stirring system is characterized in that the sealing cover is provided with a pressure gauge for detecting the pressure in the tank body.
Foretell sound combination mixing system, its characterized in that, the cell body outside is provided with the heating jacket, and the recess that is used for placing the cell body is seted up at the heating jacket middle part.
Foretell sound combination mixing system, its characterized in that, the bottom of heating jacket is provided with the base.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses an agitation system simple structure, reasonable in design. Under the stirring effect of agitator, the rotatory flow of reaction fluid in the cell body mixes, can form one and use the (mixing) shaft as the rotator at center when stable operation, and the formation of rotator is unfavorable for the mixture of each inside component of fluid, the utility model discloses a set up a plurality of static stirring oars, originally stable fluid rotator receives the hindrance, has destroyed the symmetry in original stable flow field to make fluid gyration, reposition of redundant personnel, cause fluid interface unstability, thereby realized the regulation and control of fluid mixing process in the flow field, reached the purpose of strengthening the fluid mixing mass transfer.
2. Adopt the utility model discloses a move quiet combination mixing system, can show the chromium conversion rate that improves among the chromite liquid phase oxidation process, greatly reduced reaction time realizes high efficiency's chromium salt clean production mode.
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of the stirring system of the present invention.
Fig. 2 is a schematic view of a flow field when a single dynamic stirring paddle works (Y-0 front view).
Fig. 3 is a schematic view of a flow field when a single dynamic stirring paddle works (Z-0 top view).
Fig. 4 is a schematic view of the dynamic and static combined stirring system in operation (Y is 0 front view).
Fig. 5 is a schematic view of the dynamic and static combined stirring system in operation (Z is 0 plan view).
FIG. 6 is a graph showing the relationship between the chromium leaching rate and the leaching time in the chromite liquid-phase oxidation process using a single dynamic stirring paddle and the dynamic and static combined stirring system of the present invention.
Description of reference numerals:
1-a stirrer; 2-stirring shaft; 3, sealing the cover;
4-stirring blade; 5-an intake valve; 6, heating a sleeve;
7-a thermocouple; 8, a groove body; 9-an air inlet pipe;
10-a pressure gauge; 11-outlet valve; 12-static stirring paddle;
13-base.
Detailed Description
Example 1
As shown in fig. 1, the utility model discloses a move quiet combination mixing system, including open-top's cell body 8 with set up in the sealed lid 3 of 8 openings of cell body, its characterized in that, install agitator 1 on sealed lid 3, agitator 1's (mixing) shaft 2 is located cell body 8, stirring paddle leaf 4 is installed to (mixing) shaft 2's bottom, fixed mounting has a plurality of static stirring rake 12 on sealed lid 3, and is a plurality of static stirring rake 12 sets up around (mixing) shaft 2, and is a plurality of static stirring rake 12 keeps away from the one end of sealed lid 3 and deepens in the cell body 8.
In this embodiment, the distances between the plurality of static stirring paddles 12 and the stirring shaft 2 are different. The number of the static stirring paddles 12 can be 2, 3, 4, 5 or 6, etc.
In this embodiment, the static stirring paddle 12 is a strip-shaped stirring paddle, a cylindrical stirring paddle, or a prismatic stirring paddle.
In this embodiment, a thermocouple 7 is mounted on the sealing cap 3.
In this embodiment, the lower end of the static stirring paddle 12 is located above the stirring paddle 4.
In this embodiment, the blades of the stirring blade 4 are ellipsoidal.
In the embodiment, the sealing cover 3 is provided with an air inlet and an air outlet, the air inlet is provided with an air inlet pipe 9, the air inlet pipe 9 extends into the tank body 8, the bottom of the air inlet pipe 9 is close to the bottom of the tank body 8, and the top of the air inlet pipe is provided with an air inlet valve 5; an air outlet pipe is installed at the air outlet, and an air outlet valve 11 is installed at the top of the air outlet pipe.
In this embodiment, the sealing cover 3 is provided with a pressure gauge 10 for detecting the pressure in the tank 8.
In this embodiment, the cell body 8 outside is provided with heating jacket 6, and the recess that is used for placing cell body 8 is seted up at heating jacket 6 middle part.
In this embodiment, a base 13 is disposed at the bottom of the heating jacket 6.
The utility model discloses a concrete theory of operation of sound combination mixing system is: in the reaction system (such as solid-liquid, gas-liquid, liquid-liquid, gas-liquid-solid, etc.) in the tank body 8, under the stirring action of the stirrer, the reaction fluid in the tank body 8 is mixed in a rotating flow manner, and a rotating body (shown in fig. 2 and 3) taking the stirring shaft as the center is formed during stable operation, and the formation of the rotating body is not beneficial to the mixing of all components in the fluid, but due to the existence of the static stirring paddle 12 positioned in the flow field, the original stable fluid rotating body is obstructed, the symmetry of the original stable flow field is destroyed, so that the fluid is rotated and shunted (shown in fig. 4 and 5), and the instability of a fluid interface is caused, thereby realizing the regulation and control of the fluid mixing process in the flow field and achieving the purpose of strengthening the fluid mixing mass transfer.
Will the utility model discloses a move among the quiet combination mixing system of being applied to chromite liquid phase pressurization oxidation leaching reaction, this reaction relates to gas-liquid-solid three-phase mixing mass transfer reaction system, under the effect of sound combination mixing system, the entrainment effect of cell body 8 top gas through the stirring is participated in the reaction in the solid-liquid two-phase system of entering groove, the gas phase is changed into the dynamic agitator from the mixing mode that flow field entrainment got into around the original single dynamic agitator into the multiple mixing mode in the small flow field region near flow field around the dynamic agitator and a plurality of static stirring rake 13, greatly increased the gas-liquid-solid three-phase's of reaction system mass transfer area, thereby strengthened its each looks mass transfer. The acceleration of gas-liquid-solid three-phase mass transfer is beneficial to reducing the reaction time of the system. Aiming at the chromite liquid-phase oxidation process, the method is more beneficial to reducing the reaction alkali concentration and other process conditions, improves the chromium conversion rate and simultaneously reduces the energy consumption. Therefore, the dynamic and static combined stirring system is beneficial to strengthening the mixing of the fluid in the stirring tank, enhancing the entrainment effect on the gas phase in the gas-liquid-solid three-phase reaction and improving the mass transfer rate among phases in the reaction system, can be used for various fluid mixing systems based on the stirring tank, and is particularly suitable for a multiphase reaction system with the participation of the solid which is stable in structure and difficult to decompose. In addition, the system also has the characteristics of simple structure, low energy, high efficiency, low cost, easy repair and the like.
Adopt the utility model discloses a move quiet combination mixing system and carry out chromite liquid phase oxidation method preparation chromium salt, get south Africa chromium iron powdered ore, grind to 300 meshes (48 mu m), adopt X ray fluorescence spectrum appearance (XRF) to record Cr2O3The content of the components is about 42.92 percent, and the content of chromium in the leaching solution after alkaline leaching is determined and analyzed by a dibenzoyl dihydrazide spectrophotometry (GB/T15555.4-1995). According to the ratio of 4:1 to alkali ore, 125g of chromite powder (300 meshes) and sodium hydroxide solution with the mass concentration of 60% prepared by 500g of sodium hydroxide and 333mL of deionized water are respectively weighed, mixed and added into a tank body, and the temperature and the oxygen partial pressure are controlled at 250 ℃ and 2.4MPa (the total pressure is about)3.2MPa), reaction time sets up to 60min, 120min, 180min, 240min, 300min under the condition, with single dynamic stirring rake with the utility model provides a sound combination mixing system's 2 kinds of stirred tank devices are experimental respectively, determine chromium content in the leachate. The chromium leaching rates of the two devices change along with the reaction time as shown in fig. 6, and after the reaction in the stirring tank device only using the dynamic stirring paddle is finished, the chromium leaching rate in the leaching solution is only 90% at most, and 300min is needed, so that the time is long; and after the reaction in the stirring tank device of the dynamic and static combined stirring system is finished, the chromium leaching rate can reach 99% only in 240 min. And in a short time of 60-120 min, the chromium leaching rate in the dynamic and static combined stirring system is about 2 times higher than that in the former. The utility model discloses a sound combination mixing system has realized that the high efficiency of chromite liquid phase oxidation method leaches in the short time, improves the chromium leaching rate simultaneously greatly, has avoided secondary recovery and wasting of resources, and the mode of reinforceing that sound combines has effectively improved mass transfer efficiency and reaction process efficiency in the system to be applicable to all kinds of heterogeneous reaction systems, belong to a novel, high-efficient device of reinforceing heterogeneous mass transfer.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to utility model technical entity to any simple modification, change and the equivalent structure change of doing above embodiment, all still belong to the utility model discloses technical scheme's within the scope of protection.
Claims (10)
1. The utility model provides a sound combination mixing system, includes open-top's cell body (8) and sets up in sealed lid (3) of cell body (8) opening part, its characterized in that, install agitator (1) on sealed lid (3), agitator (1) stirring shaft (2) are located cell body (8), and stirring paddle leaf (4) are installed to the bottom of (mixing) shaft (2), fixed mounting has a plurality of static stirring rake (12) on sealed lid (3), and is a plurality of static stirring rake (12) set up around (mixing) shaft (2), and is a plurality of static stirring rake (12) are kept away from the one end of sealed lid (3) and are deepened in cell body (8).
2. A dynamic and static combined stirring system as recited in claim 1, wherein a plurality of said static stirring paddles (12) are all at different distances from the stirring shaft (2).
3. A hybrid mixing system as claimed in claim 1 or 2, wherein said static mixer (12) is a ribbon, cylinder or prism mixer.
4. A hybrid mixing system as claimed in claim 1, wherein said sealing cover (3) is provided with a thermocouple (7).
5. A hybrid mixing system as claimed in claim 1, wherein said static mixing paddles (12) are located above said mixing blades (4) at their lower ends.
6. A hybrid mixing system as claimed in claim 1, wherein said mixing blades (4) are ellipsoidal in shape.
7. The dynamic and static combined stirring system as claimed in claim 1, wherein the sealing cover (3) is provided with an air inlet and an air outlet, the air inlet is provided with an air inlet pipe (9), the air inlet pipe (9) extends into the tank body (8), the bottom of the air inlet pipe (9) is close to the bottom of the tank body (8), and the top of the air inlet pipe is provided with an air inlet valve (5); an air outlet pipe is installed at the air outlet, and an air outlet valve (11) is installed at the top of the air outlet pipe.
8. The dynamic and static combined stirring system as claimed in claim 1, wherein the sealing cover (3) is provided with a pressure gauge (10) for detecting the pressure in the tank body (8).
9. The dynamic and static combined stirring system as claimed in claim 1, wherein a heating jacket (6) is arranged outside the tank body (8), and a groove for placing the tank body (8) is formed in the middle of the heating jacket (6).
10. A dynamic and static combined stirring system as recited in claim 9, wherein a base (13) is provided at the bottom of said heating jacket (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922251226.XU CN211235213U (en) | 2019-12-16 | 2019-12-16 | Dynamic and static combined stirring system |
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| CN201922251226.XU CN211235213U (en) | 2019-12-16 | 2019-12-16 | Dynamic and static combined stirring system |
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| CN211235213U true CN211235213U (en) | 2020-08-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049334A (en) * | 2021-03-22 | 2021-06-29 | 四川省分析测试服务中心 | Chemical sample preparation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049334A (en) * | 2021-03-22 | 2021-06-29 | 四川省分析测试服务中心 | Chemical sample preparation device |
| CN113049334B (en) * | 2021-03-22 | 2023-10-03 | 四川省分析测试服务中心 | Chemical sample preparation device |
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