CN109224537B - Sedimentation stirring equipment - Google Patents
Sedimentation stirring equipment Download PDFInfo
- Publication number
- CN109224537B CN109224537B CN201811044668.0A CN201811044668A CN109224537B CN 109224537 B CN109224537 B CN 109224537B CN 201811044668 A CN201811044668 A CN 201811044668A CN 109224537 B CN109224537 B CN 109224537B
- Authority
- CN
- China
- Prior art keywords
- blade
- diameter
- sedimentation
- stirring
- satisfy
- Prior art date
- 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.)
- Active
Links
- 238000003756 stirring Methods 0.000 title claims abstract description 62
- 238000004062 sedimentation Methods 0.000 title claims abstract description 43
- 239000012530 fluid Substances 0.000 claims description 5
- 238000007790 scraping Methods 0.000 claims description 5
- 238000013019 agitation Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 47
- 238000006243 chemical reaction Methods 0.000 abstract description 25
- 238000000926 separation method Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 239000012071 phase Substances 0.000 description 7
- 230000001133 acceleration Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/28—Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- 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
-
- 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
- C02F2001/007—Processes including a sedimentation step
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention relates to the field of chemical equipment, and particularly discloses sedimentation stirring equipment, which comprises a stirring tank body, wherein a stirring device is arranged in the tank body and comprises a rotating shaft, the top of the rotating shaft is provided with a motor, and the middle part of the rotating shaft is provided with at least one layer of paddles; the height L and the diameter D of the stirring tank body satisfy the following conditions: l/d=0.3 to 3, and the diameter D of the blade and the diameter D of the tank satisfy: d/d=0.05 to 0.95, and the diameter D of the blade and the width b of the blade satisfy: b/d=0.05 to 2.5. Compared with the prior art, the invention provides the sedimentation stirring equipment, particles generated in the reaction process are not destroyed, large-diameter particles can be conveniently and rapidly formed, sedimentation speed is high, and separation efficiency is high.
Description
Technical Field
The invention relates to the field of chemical equipment, in particular to sedimentation stirring equipment.
Background
With the rapid development of industry, the types and the quantity of wastewater are rapidly increased, and the pollution of the wastewater is also increasingly wide and serious, and if the wastewater is discharged without treatment, the wastewater can cause pollution of different properties and different degrees of water bodies, thereby threatening the health and safety of human beings and affecting the industrial and agricultural production. The existing wastewater treatment at least comprises a reaction tower and a precipitation tower, wherein the wastewater is fully reacted with the added reactant in the reaction tower and then is transferred to the precipitation tower, and the particles obtained by the reaction are separated out by precipitation, so that the efficiency is low and the occupied area is large. Meanwhile, in the process of transferring the reacted liquid to the precipitation tower, the generated particles also easily cause blockage of a pipeline or a lifting pump.
At present, the sedimentation of substances mostly adopts two modes of natural sedimentation and centrifugal sedimentation, and mainly aims at different densities, all materials are subjected to gravity acceleration g or inertial centrifugal acceleration a at the same time, and different densities are separated under different stress. The existing sedimentation usually takes the whole mixed material as an action object, cannot meet the reaction requirement, and has lower efficiency. However, the existing reaction kettle with the stirring function cannot meet the sedimentation requirement, and no stirring equipment with the sedimentation effect exists at present.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides stirring equipment with a sedimentation effect.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
The sedimentation stirring device comprises a stirring tank body, wherein a stirring device is arranged in the tank body and comprises a rotating shaft, a motor is arranged at the top of the rotating shaft, and the middle part of the rotating shaft is provided with at least one layer of paddles; the height L and the diameter D of the stirring tank body satisfy the following conditions: l/d=0.3 to 3, and the diameter D of the blade and the diameter D of the tank satisfy: d/d=0.05 to 0.95, and the diameter D of the blade and the width b of the blade satisfy: b/d=0.05 to 2.5.
The prior sedimentation technology has the advantages of multipurpose gravity sedimentation and centrifugal sedimentation, force acts on the equipment and the content, substances with different densities are separated by utilizing the density difference, and the macroscopic continuous phase is static relative to the container equipment; the stirring device is mainly used for mixing and dispersing different materials, reacting and transferring mass and heat. Unlike existing sedimentation modes and agitators, the invention provides an agitating apparatus with sedimentation effect. For sedimentation under agitation, the sedimentation velocity of particles is proportional to the 2 nd power of particle diameter, the continuous phase dispersed phase density difference, and the motion acceleration, and inversely proportional to the liquid phase viscosity. For a given system, the density difference and viscosity are fixed values, and therefore the particle diameter is a critical factor affecting the sedimentation rate of the particles, that is to say ensuring that the particles are not destroyed and grow rapidly during stirring is most critical, so that strong collisions, including blades and particles, liquids and particles, are not required, and strong turbulence and reverse flow of the liquid flow direction are not required.
According to the invention, through limiting parameters of the tank body and the paddles, liquid flow in the stirring equipment runs in a laminar flow state, the molded particles are not destroyed by the paddles, two zones are approximately formed in the tank body, the stirring zone of the paddles is an acceleration zone, and the zone between the tank body and the paddles is a stall zone. The reaction phase is fully contacted in an acceleration zone to generate crystal nucleus or particles, then the crystal nucleus or particles are stirred and thrown out to a stall zone (non-collision zone) by a blade, and particles in the stall zone (non-collision zone) have a stall process in the radial direction, so that the particles can be free to subside without touching the kettle wall after being thrown out, and the reaction particles are continuously increased in the subsidence process.
The invention ensures that the crystal nucleus or the particles generated in the reaction process can not collide with the blades, the kettle wall and the liquid in a strong manner in the stirring process, so that the particles or the crystal nucleus can grow into large particles quickly and settle down quickly. The above parameters may be adjusted according to the rate at which the actual reaction produces nuclei or minute particles. The invention provides stirring equipment which does not damage the formation of particles in the reaction process, the particles are convenient to form large-diameter particles quickly, the sedimentation speed is high, and the separation efficiency is greatly improved.
As a preferred solution, the diameter D of the blade and the diameter D of the can satisfy: d/d=0.35 to 0.75, and the diameter D of the blade and the width b of the blade satisfy: b/d=0.30-2, and the height L and the diameter L of the stirring tank body satisfy: l/d=0.5 to 2.
As a preferable scheme, the number of layers of the blade is 2-5.
As a preferable scheme, the blade is an involute impeller. Wherein the involute impeller can provide enough stirring power per unit volume, and the surface of the involute impeller is smooth. The stirring effect is good, the collision between particles or crystal nucleus generated by the reaction and the blade can be greatly reduced, the rapid reaction is convenient, and the reaction solid particles are rapidly increased.
As a preferable scheme, the number of layers of the blade is 3.
As a preferable scheme, the interlayer spacing b 2 =0.5b-5 b of the blade (2). The inter-layer distance between the paddles can ensure the stirring effect of each layer in the range, ensures that liquid flow in the system runs in a laminar state, and simultaneously has no axial flow in the vertical direction, so that particles can be quickly settled.
As a preferred solution, in order to further avoid strong turbulence and counter-flow of the fluid in the stirring device, the blades of said blades (2) of adjacent layers are not coincident.
As a preferred solution, the diameter D of the blade (2) and the diameter D of the tank (3) satisfy: d/d=0.44, the diameter D of the blade (2) and the width b of the blade (2) satisfy: b/d=0.48, the height L and diameter L of the stirring tank body (3) satisfy: l/d=1; the interlayer spacing b 2 of the blade (2) is=1.2b.
In order to facilitate the collection of the particles generated by the reaction without adhering to the bottom of the tube body, the invention is also provided with a bottom scraping part at the bottom of the rotating shaft. In order to facilitate bottom scraping, the bottom of the tank body can be arranged into an inverted cone shape.
As a preferable mode, the reynolds number Re of the fluid in the tank body (3) is=0.05 to 300. Preferably, the reynolds number re=33.33 of the fluid in the tank (3).
As a preferable scheme, the rotating speed of the stirring device is 1-300 rpm. Preferably, the rotational speed of the stirring device is 5rpm.
Compared with the prior art, the invention provides the sedimentation stirring equipment, particles generated in the reaction process are not destroyed, large-diameter particles can be conveniently and rapidly formed, sedimentation speed is high, and separation efficiency is high.
Drawings
FIG. 1 is a schematic sectional view of a sedimentation stirring device.
FIG. 2 is a schematic diagram of A-A and B-B.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Examples
The embodiment provides a stirring device which can prevent particles generated in the reaction process from being destroyed, is convenient for forming large-diameter particles quickly, has high sedimentation speed and high separation efficiency
As shown in fig. 1, the embodiment provides a sedimentation stirring device, which comprises a tank body 3 of a stirring tank, wherein a stirring device is arranged in the tank body 3, and the stirring device comprises a rotating shaft, a motor 1 arranged at the top of the rotating shaft, a blade 2 arranged in the middle of the rotating shaft and a scraping bottom part 5 arranged at the bottom of the rotating shaft; in order to facilitate bottom scraping, the bottom of the tank body 3 is designed into an inverted cone shape.
Wherein, the top of the sedimentation stirring device can be provided with at least one feed inlet for directly adding reactants into the system to obtain a reaction phase. In addition, the reactants can be added into the system before entering the sedimentation stirring equipment, and then the mixture is transferred into the sedimentation stirring equipment for stirring reaction.
The reaction speed, the material viscosity, the density difference, the interfacial tension parameter and the solid phase particle size of the system all influence the sedimentation of the particles generated in the system: 1. the reaction speed is basically proportional to the stirring power, and the rapid sedimentation of the solid phase can accelerate the reaction; 2. the greater the viscosity of the continuous phase, the slower the settling; 3. the greater the density difference, the faster the settling, but for a fixed reactant, the density difference is a fixed value; 4. interfacial tension is also a constant value for our fixed system; 5. the larger the particles, the faster the sedimentation and the square relationship, so the particles are not broken down and gradually grow up is critical.
In order to achieve the purpose of not damaging crystal nucleus/particles generated in the reaction process, in the sedimentation process, firstly, the stirring power per unit volume is required to be larger, the reaction phases are fully contacted as far as possible, solid particles of the reaction products are subjected to centrifugal force, and the particle diameter is increased in the process of throwing out; secondly, the liquid flow in the stirring equipment should run in a laminar flow state, the stirring paddles do not destroy the formed particles, the formed particles can be freely settled without touching the kettle wall after being thrown out, and the particles rapidly grow up without being destroyed due to a stall process in the radial direction; finally, for convenience of rapid sedimentation, there is no levitation force and no axial flow in the vertical direction.
As shown in fig. 1, the present embodiment sets the following conditions:
1. the height L and the diameter D of the stirring tank body satisfy the following conditions: l/d=0.3 to 3;
2. The diameter D of the blade and the diameter D of the tank body satisfy the following conditions: d/d=0.05 to 0.95;
3. the diameter d of the blade and the width b of the blade satisfy the following conditions: b/d=0.05 to 2.5;
4. the Reynolds number Re=0.05-300, and the rotating speed of the stirring device is 1-300 rpm;
5. The number of layers of the stirring device paddles is 1-N, and the interlayer spacing b 2 =0.5b-5 b.
In practical application, various parameters of 1 to 5 are adjusted according to the speed of generating crystal nuclei or tiny particles by reaction.
Wherein, the paddle 2 of the stirring device can be selected from a paddle type, a turbine, a screw, a ribbon, and the like, and the involute type impeller used in the embodiment is optimal under the condition.
In this embodiment, three layers of paddles are used, and the inter-layer spacing b 2 between the paddles is 1.2 times the paddle width b. In order to further avoid strong turbulence and counter-flow of the fluid in the stirring device, fig. 2a is a cross-sectional view A-A and fig. 2B is a cross-sectional view B-B, in which the blades of the adjacent layers are not coincident in top view. Therefore, during stirring, water flows formed by the paddles of each layer are not easy to collide with each other, and turbulence and reverse flow are not easy to form in the system.
In one preferred embodiment, the parameters of the preferred embodiment are: d/d=0.44, b/d=0.48, l/d=1, the number of blade layers is 3, b 2/b=1.2, the rotation speed is 5rpm, re=33.33, the motor runs clockwise.
The sedimentation stirring device provided by the embodiment is characterized in that solid-phase particles are generated by reaction in each layer of impeller, and are thrown out to a non-collision area through gentle and powerful stirring to be freely settled to the bottom of a kettle, and are not carried by liquid flow after reaching the bottom of the kettle. The particle growth process is as long as possible without damage, so that the reaction is accelerated, and the generated particle particles are large and are very convenient to separate.
The above examples are provided for the purpose of clearly illustrating the invention and are not to be construed as limiting the invention in any way. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (6)
1. The sedimentation stirring device is characterized by comprising a stirring tank body (3), wherein a stirring device is arranged in the tank body (3) and comprises a rotating shaft, the top of the rotating shaft is provided with a motor (1), and the middle part of the rotating shaft is provided with at least one layer of paddles (2); the height L and the diameter D of the stirring tank body (3) satisfy the following conditions: L/D=0.3-3, and the diameter D of the blade (2) and the diameter D of the tank body (3) meet the following conditions: d/d=0.05 to 0.95, and the diameter D of the blade (2) and the width b of the blade (2) satisfy: b/d=0.05 to 2.5;
the blade (2) is an involute impeller;
the blades of the blades (2) of the adjacent layers are not coincident in the overlooking angle;
-layer spacing b 2 = 1.2b of the blade (2);
the rotating speed of the blade (2) is 5rpm;
The Reynolds number Re of the fluid in the tank body (3) is=0.05-300.
2. A sedimentation stirring device according to claim 1, characterized in that the diameter D of the blade (2) and the diameter D of the tank (3) satisfy: d/d=0.35 to 0.75, and the diameter D of the blade (2) and the width b of the blade (2) satisfy: b/d=0.30-2, and the height L and the diameter L of the stirring tank body (3) satisfy: l/d=0.5 to 2.
3. Sedimentation stirring device according to claim 1, characterized in that the number of layers of the blade (2) is 2-5.
4. A sedimentation agitation apparatus according to claim 3, characterized in that the number of layers of the blade (2) is 3.
5. A sedimentation stirring device according to claim 3 or 4, characterized in that the diameter D of the blade (2) and the diameter D of the tank (3) satisfy: d/d=0.44, the diameter D of the blade (2) and the width b of the blade (2) satisfy: b/d=0.48, the height L and diameter L of the stirring tank body (3) satisfy: l/d=1.
6. The sedimentation stirring device according to any one of claims 1 to 5, characterized in that the bottom of the tank (3) is in the shape of an inverted cone; and/or the bottom of the rotating shaft is also provided with a bottom scraping part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811044668.0A CN109224537B (en) | 2018-09-07 | 2018-09-07 | Sedimentation stirring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811044668.0A CN109224537B (en) | 2018-09-07 | 2018-09-07 | Sedimentation stirring equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109224537A CN109224537A (en) | 2019-01-18 |
| CN109224537B true CN109224537B (en) | 2024-08-02 |
Family
ID=65060067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811044668.0A Active CN109224537B (en) | 2018-09-07 | 2018-09-07 | Sedimentation stirring equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109224537B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208911524U (en) * | 2018-09-07 | 2019-05-31 | 佛山市科顺建筑材料有限公司 | A kind of sedimentation mixing plant |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3676209B2 (en) * | 2000-08-22 | 2005-07-27 | 株式会社西原環境テクノロジー | Coagulation sedimentation processing equipment |
| CN202682857U (en) * | 2012-04-28 | 2013-01-23 | 重庆紫光天化蛋氨酸有限责任公司 | Efficient thickening precipitator |
| JP6770949B2 (en) * | 2015-03-31 | 2020-10-21 | 株式会社クボタ | Control method of rapid stirrer and rapid stirrer |
| CN205340237U (en) * | 2015-12-30 | 2016-06-29 | 常德华馥生物技术有限公司 | Device is subsided to environment -friendly |
-
2018
- 2018-09-07 CN CN201811044668.0A patent/CN109224537B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208911524U (en) * | 2018-09-07 | 2019-05-31 | 佛山市科顺建筑材料有限公司 | A kind of sedimentation mixing plant |
Non-Patent Citations (1)
| Title |
|---|
| 搅拌反应器内三维流场对絮凝效果影响研究;尉鹏翔;人民黄河(第05期);43-45 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109224537A (en) | 2019-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5658076A (en) | Apparatus for storing and handling waste water slurries | |
| JP2507839B2 (en) | Stirrer | |
| US20060176771A1 (en) | Agitation system and method for dry solids addition to fluid | |
| WO2003087182A2 (en) | Mixer | |
| AU2014211305A1 (en) | Stirred tank reactor | |
| JP2014226648A (en) | Agitator | |
| CN202921312U (en) | Self-suction stirrer of reaction kettle | |
| CN107720916B (en) | Rotary waterfall type mixer | |
| AU2008340237B2 (en) | Method and apparatus for mixing | |
| WO2015160850A1 (en) | Conical impeller and applications thereof | |
| CN102049206B (en) | Continuous pulping equipment for powder | |
| CN109758942B (en) | Stirrer | |
| CN108159951A (en) | A kind of hinged joint paddle stirring device | |
| CN109224537B (en) | Sedimentation stirring equipment | |
| CN208911524U (en) | A kind of sedimentation mixing plant | |
| RU2683078C1 (en) | Mixing device | |
| KR20190025590A (en) | Containers for particle generation AND Particle generation method Using them | |
| KR101955286B1 (en) | Containers for particle generation AND Particle generation method Using them | |
| KR20170131152A (en) | Chemical reactor and preparation method of olefin using the same | |
| CN213611355U (en) | Bottom discharge continuous stirring tank | |
| WO2006033276A2 (en) | Stirring apparatus | |
| KR20190121114A (en) | Powerless mixer and cyclone settling apparatus having the same | |
| CN203196566U (en) | Circular disc turbine agitator | |
| CN206881723U (en) | A kind of jet agitation device | |
| CN220715469U (en) | Stirring machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |