CN111215015A - Special stirring device for viscous fluid mixing and gas dispersing - Google Patents

Special stirring device for viscous fluid mixing and gas dispersing Download PDF

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Publication number
CN111215015A
CN111215015A CN201911425957.XA CN201911425957A CN111215015A CN 111215015 A CN111215015 A CN 111215015A CN 201911425957 A CN201911425957 A CN 201911425957A CN 111215015 A CN111215015 A CN 111215015A
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CN
China
Prior art keywords
gas
blade
spiral
viscous fluid
blades
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CN201911425957.XA
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Chinese (zh)
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CN111215015B (en
Inventor
谢明辉
邹晨
林鹏辉
夏建业
王洪群
李向阳
张伟鹏
杨超
王炳信
虞淑瑶
周国忠
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Zhejiang Greatwall Mixers Co ltd
Institute of Process Engineering of CAS
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Zhejiang Greatwall Mixers Co ltd
Institute of Process Engineering of CAS
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Application filed by Zhejiang Greatwall Mixers Co ltd, Institute of Process Engineering of CAS filed Critical Zhejiang Greatwall Mixers Co ltd
Priority to CN201911425957.XA priority Critical patent/CN111215015B/en
Publication of CN111215015A publication Critical patent/CN111215015A/en
Application granted granted Critical
Publication of CN111215015B publication Critical patent/CN111215015B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/115—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis
    • B01F27/1152—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis with separate elements other than discs fixed on the discs, e.g. vanes fixed on the discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/93—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with rotary discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B01J19/0066—Stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
    • C12M27/02—Stirrer or mobile mixing elements
    • C12M27/04—Stirrer or mobile mixing elements with introduction of gas through the stirrer or mixing element

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Zoology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Sustainable Development (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • Biomedical Technology (AREA)
  • Biochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Genetics & Genomics (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

The invention discloses a special stirring device for viscous fluid mixing and gas dispersion, which comprises a driving mechanism (1) at the upper part, a stirring kettle for containing a medium, a shaft (2) extending into the kettle from the driving mechanism and a stirrer (3) arranged at the lower end of the shaft (2), wherein a gas distributor (4) is arranged below the stirrer (3), and the special design of the stirrer (3) is matched with the gas distributor (4) below the stirrer, so that the gas-liquid mass transfer capacity can be improved, the mixing efficiency of the fluid can be enhanced, the problems of high-viscosity medium mixing and gas dispersion are solved, the special stirring device is suitable for the ventilation stirring fermentation process of viscous materials, is also suitable for other gas-liquid reaction processes such as hydrogenation reaction, oxidation reaction and the like, and has high-efficiency mixing performance and gas dispersion mass transfer performance.

Description

Special stirring device for viscous fluid mixing and gas dispersing
Technical Field
The invention belongs to the technical field of stirring, and particularly relates to a special stirring device for viscous fluid mixing and gas dispersion.
Background
Stirring devices are widely used in many industries of industry. In a gas-liquid-solid three-phase system for polysaccharide fermentation, the growth of microorganisms needs breathing oxygen, so that sterile compressed air needs to be introduced. The oxygen in the air is transferred from the gas phase to the liquid phase and finally to the cell. Because the medium viscosity is large, the gas phase is difficult to enter the liquid phase, the mass transfer is difficult, and the existing stirrer can not meet the requirements of mixing and gas dispersion.
Disclosure of Invention
The invention aims to solve the technical problem of providing a special stirring device for viscous fluid mixing and gas dispersion, and solving the problems of medium mixing and gas dispersion in the polysaccharide fermentation process.
The technical scheme who solves above-mentioned technical problem and adopt provides a viscous fluid mixes and special agitating unit of gaseous dispersion, including the actuating mechanism on upper portion, the stirred tank of splendid attire medium, stretch into the axle in the cauldron and the installation by actuating mechanism and be located the agitator of axle lower extreme, dispose the gas distributor below the agitator. The ratio of the diameter of the stirrer to the inner diameter of the kettle is usually 0.35-0.6, and the stirrer comprises a hub at the central position, a disk which is integrated with the hub and surrounds the hub, a spiral cone upturned curved surface blade and a spiral cone downward-pressed curved surface blade which are positioned at the outer edge of the disk, and a backward-bent blade which is arranged at the lower side of the disk and integrated with the disk. The disc and the backward bending blade on the lower side of the disc are fixed on the lower half part of the hub, and the ratio of the diameter of the disc to the diameter of the stirrer is proper between 0.5 and 0.8. The spiral cone turn-up curved surface blade and the spiral cone push-down curved surface blade are manufactured in pairs, 1 pair, 2 pairs, 3 pairs or 4 pairs can be required according to the size of the kettle body, and the inner diameter of the circular ring position where the spiral cone turn-up curved surface blade and the spiral cone push-down curved surface blade are located is close to the half position of the radius of the circular disc. The backward bending blade is arranged between the two spiral cone upward turning curved surface blades and the spiral cone downward pressing curved surface blade. The distance between the gas distributor and the lower end of the backward bent blade is 50-100 mm, the diameter of the gas distributor is usually 0.6-0.8 times of the diameter of the disc, and the ventilation direction of the gas distributor is upward. Above-mentioned agitator passes through holding screw detachably with the help of the first half of self wheel hub to be fixed on the axle and can be followed its operation, and the recurve blade forms great radial streamline of centrifugation during the operation, and the center forms the negative pressure, inhales the gas that gas distributor came out fast, then goes into the air pocket that the recurve blade formed and disperses, has better gas dispersion ability and power consumption and hangs down.
After the gas is dispersed by the backward-bending blades, the gas enters the stirring range of the spiral cone upward-turning curved surface blades and the spiral cone downward-pressing curved surface blades, when the spiral cone upward-turning curved surface blades and the spiral cone downward-pressing curved surface blades discharge fluid, a part of gas can be sucked into the rear parts of the spiral cone upward-turning curved surface blades and the spiral cone downward-pressing curved surface blades to form gas pockets to be dispersed again, the gas pockets touch the edges of the spiral cone upward-turning curved surface blades and the spiral cone downward-pressing curved surface blades to be broken again, the outer edges and the upper and lower edges of the spiral cone upward-turning curved surface blades and the spiral cone downward-pressing curved surface blades are made into saw-toothed shapes, and the secondary breaking effect. During manufacturing, the edges of the sawteeth can be guided into round corners, so that people are prevented from being injured.
In addition, in the operation process, the spiral cone downward-pressing curved surface blade discharges fluid downwards, the spiral cone upward-turning curved surface blade discharges fluid upwards, an unstable flow field can be formed, the flow in the reactor is in a chaotic state, the turbulence degree of the fluid is improved, the utilization rate of energy input through the blades is increased, and the mixing efficiency of the fluid is further improved.
The invention has the advantages that the special design of the stirrer is matched with the gas distributor below the stirrer, so that the gas-liquid mass transfer capacity can be improved, the mixing efficiency of the fluid can be enhanced, the problems of mixing of high-viscosity media and gas dispersion are solved, and the stirrer is suitable for the ventilation stirring fermentation process of viscous materials, is also suitable for other gas-liquid reaction processes such as hydrogenation reaction, oxidation reaction and the like, and has high-efficiency mixing performance and gas dispersion mass transfer performance.
Drawings
FIG. 1 is a schematic structural diagram of a stirring device dedicated for mixing viscous fluid and dispersing gas.
Fig. 2 is a schematic perspective view of the mixer of fig. 1.
Fig. 3 is a top view of the mixer of fig. 1.
FIG. 4 is the mixer of FIG. 3
In the drawings, 1. a drive mechanism; 2. a shaft; 3. a stirrer; 4. a gas distributor; 31. a disc; 32. backward bending the blade; 33. a helical conical upturned curved blade; 34. a hub; 35. the spiral cone presses down the curved blade.
Detailed Description
The invention comprises a driving mechanism 1 at the upper part, a stirring kettle for holding medium, a shaft 2 extending into the kettle from the driving mechanism, and a stirrer 3 arranged at the lower end of the shaft 2, wherein a gas distributor 4 is arranged at a position 60mm away from the lower end of a backward bent blade 32 below the stirrer 3. The ratio of the diameter of the stirrer 3 to the inner diameter of the tank was 0.55, and the stirrer 3 included a hub 34 at the center, a disk 31 welded integrally with the hub and surrounding the hub, a spiral conical upward-turning curved surface blade 33 and a spiral conical downward-pressing curved surface blade 35 welded and positioned at the outer edge of the disk 31, and a backward-bending blade 32 welded integrally with the disk 31 at the lower side thereof. The disk 31 and the blades 32 bent backward on the lower side thereof are welded and fixed to the lower half of the hub 34, and the ratio of the disk diameter to the agitator diameter is 0.65. The spiral cone turn-up curved surface blade 33 and the spiral cone push-down curved surface blade 35 are manufactured into 2 pairs, and the inner diameter of the circular ring position where the spiral cone turn-up curved surface blade 33 and the spiral cone push-down curved surface blade 35 are located is equal to half of the radius of the disc 31. The backward curved blades 32 are uniformly arranged between the two spiral cone upward turning curved blades 33 and the spiral cone downward pressing curved blade 35. The diameter of the gas distributor 4 is 0.6 times the diameter of the disc 31, and the direction of aeration of the gas distributor 4 is upward. The stirrer 3 is detachably fixed to the shaft 2 by means of its upper half of the hub 34 by means of set screws. The outer edges and the upper and lower edges of the spiral-cone turn-up curved surface blades 33 and the spiral-cone turn-down curved surface blades 35 are formed in a zigzag shape.

Claims (6)

1. The utility model provides a viscous fluid mixes and special agitating unit of gas dispersion, including actuating mechanism (1) on upper portion, the stirred tank of splendid attire medium, stretch into axle (2) in the cauldron by actuating mechanism and install agitator (3) of being located axle (2) lower extreme, its characterized in that disposes gas distributor (4) below agitator (3), agitator (3) are including wheel hub (34) of central point position, become an organic whole and around its peripheral disc (31) with wheel hub, be located spiral cone upturning curved surface blade (33) and spiral cone curved surface blade (35) that push down of disc (31) outer fringe, dispose recuring curved blade (32) with one body in disc (31) downside.
2. The stirring apparatus for viscous fluid mixing and gas dispersing as claimed in claim 1, wherein the outer edges and upper and lower edges of said spiral conical flip-up surface blades (33) and said spiral conical push-down surface blades (35) are formed in a zigzag shape, and the outer edges of said spiral conical flip-up surface blades (33) and said spiral conical push-down surface blades (35) are formed in a diameter larger than the outer diameter of said disk (31).
3. The viscous fluid mixing and gas dispersing exclusive use stirring apparatus according to claim 1, characterized in that the backward curved blade (32) is disposed between two spiral-cone turn-up surface blades (33) and a spiral-cone turn-down surface blade (35).
4. The special stirring device for viscous fluid mixing and gas dispersing of claim 1, wherein two helical conical upturned curved blades (33) and two helical conical down-turned curved blades (35) are uniformly distributed at a half radius of the outer side of the disc (31).
5. The viscous fluid mixing and gas dispersing exclusive stirring apparatus according to claim 1, characterized in that the disk (31) and the backward-bent blade (32) on its lower side are fixed to the lower half of the hub (34).
6. The viscous fluid mixing and gas dispersing special stirring device according to claim 1, wherein the distance between the gas distributor (4) and the lower end of the backward bent blade (32) is 50 mm-100 mm, and the diameter of the gas distributor (4) is 0.6-0.8 times of the diameter of the backward bent blade (32).
CN201911425957.XA 2019-12-26 2019-12-26 Special stirring device for viscous fluid mixing and gas dispersing Active CN111215015B (en)

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CN111215015B CN111215015B (en) 2022-07-12

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112516861A (en) * 2020-12-15 2021-03-19 遵义市金鼎农业科技有限公司 Processing equipment of fodder
CN113731219A (en) * 2021-09-06 2021-12-03 中国科学院过程工程研究所 Sweepback type disc turbine stirring paddle
WO2023216231A1 (en) * 2022-05-13 2023-11-16 Sharkninja Operating Llc Agitator for a carbonation system

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CN112246209A (en) * 2020-10-23 2021-01-22 安徽瑞旭搅拌设备有限公司 Stirrer for reaction kettle under condition of no baffle

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112516861A (en) * 2020-12-15 2021-03-19 遵义市金鼎农业科技有限公司 Processing equipment of fodder
CN113731219A (en) * 2021-09-06 2021-12-03 中国科学院过程工程研究所 Sweepback type disc turbine stirring paddle
CN113731219B (en) * 2021-09-06 2022-05-10 中国科学院过程工程研究所 Sweepback type disc turbine stirring paddle
WO2023216231A1 (en) * 2022-05-13 2023-11-16 Sharkninja Operating Llc Agitator for a carbonation system

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