CN2398288Y - Hafu-type axial stirring paddle - Google Patents

Abstract

The utility model relates to a hafu-type axial stirring paddle belonging to the technical field of the design of a stirring paddle for a bioreactor. The axial stirring paddle is composed of two symmetric halves, and an integral body of a hafu-type stirring paddle is formed by fastening of a hafu structure. The stirring paddle comprises an inner hub and an outer hub, wherein, the inner hub and the outer hub are welded and fixed through an inner blade; the outer side of the outer hub is welded and fixed with a fixed sheet; the fixed sheet and an outer blade are fastened by a screw bolt. The utility model has the advantages of convenient operation and good effect; when used for biological reaction, the utility model has the advantages of less mixing time, good mass transferring capacity, energy consumption saving, moderate shearing and regionalization phenomenon reduction; the utility model is particularly suitable for fermentation of non newton liquid.

Description

The axial stirring rake of a kind of Hough formula

The utility model belongs to bio-reactor stirring rake design field.

In the recent two decades, new-type bioreactor continues to bring out, but stirred-tank fermenter still occupies dominant position in the industrial microorganism fermentation.Whipping appts is the essential elements of fermentor tank, and agitating vane is the most critical part of whipping appts.For a long time, the radial flow disk turbine stirring rake that is made of straight or curved blade profile blade is the main agitator that stirred-tank fermenter adopts.The ability that this disk turbine oar is pulverized bubble is strong, easily processing, but full still mixed performance is poor, and shearing is uneven, and in full-bodied fermented liq, this phenomenon is particularly serious, and tangible compartmentation phenomenon is arranged.From the eighties, the research of mechanical agitating fermentation tank mixer operations performance has been impelled the appearance of a series of high-performance axial flow stirring rakes, as the Intermig oar of the Maxflo oar of the LightninA series oar of U.S. Rochester mixing equipment company development, the development of Canadian Prochem company, the development of German Ekato company etc., an evident characteristic of these oars is that full still mixes, the mass transfer ability improves and shears gentle.External each major company especially some pharmaceutical factories has produced obvious effects after using the axial flow oar, transforms on a large scale to substitute and carries out.Domestic aspect axial stirring rake research starting evening, less investment, face is narrow and the degree of depth is not enough, and mainly is to study at the mixed performance of chemical reaction still, and is and few to the applied research of this stirring rake in bio-reactor.Known from institute, biological respinse and chemical reaction have essential difference, and the former is a gas-liquid-solid three-phase hybrid reaction and the latter only is a reactive liquid solution.In addition, the report of axial stirring rake large-scale redevelopment conventional radial stream disk turbine oar also of no use up to now, this has also reflected the weakness of this respect market development.

The external axially structure of stirring rake is whole pattern, and by the garden annular hub, the wheel hub outside is equipped with (outward) blade to be formed, and the axial stirring rake of this whole pattern is installed on the stir shaft by anchor ear.Bio-reactor is often bulky, have together or two roads or the support of three roads at the general device of reactor wall for this reason, so, the use of the stirring rake device of this whole pattern, its installation and removal are just extremely inconvenient, be subjected to the restriction of domestic processing conditions, the stirring rake of this whole pattern and the working accuracy of stir shaft extremely difficulty reach the desired precision of assembling in addition.For this reason, be necessary the axial stirring rake of monolithic devices is improved design, to satisfy the needs of domestic production development.

The purpose of this utility model is that proposition is a kind of easy to use, and the axial stirring rake of Hough formula replaces traditional radial flow oar efficiently, so that improve mass transfer, mixed effect in the bio-reactor, improves fermentation level, adapts to China's biological respinse industrial expansion.

Structure of the present utility model is that the stirring rake body is made up of symmetric two halves, two halves are by inner wheel hub 5 is 4 fastening by bolt and nut by half slide structure, outer wheel hub 7 is fastening by bolt and nut 3 by the fixed plate 2 and the outer leafs 1 in its outside, when installing and using by a Hough formula of the fastening formation of these twice stirring rake integral body.Inner wheel hub and outer wheel hub are fixing by intra vane 6 welding, outer wheel hub outside welding fixed plate, and fixed plate and outer leafs are fastening by bolt and nut, this fastening fastening effect of having played the connections of outer wheel hub two halves simultaneously.Inner wheel hub by the Hough anchor ear on stir shaft.Its wiring layout as shown in Figure 1, one of outer leafs example as shown in Figure 2, intra vane can adopt various ways, one of example as shown in Figure 3.Outer leafs adopts high expanded area ratio blade, and quantity is the 4-6 sheet.This stirring rake material adopts stainless steel, and this stirring rake outside dimension is Φ 500-Φ 1600mm.

The utility model has the advantages that: these axial stirring rake installation and removal are convenient; Result of use is splendid, is used for bio-reactor, can improve mass-transfer efficiency, improves mixed performance, and can well move under aeration condition.Especially for full-bodied quasi-viscous liquid fermentation, adopt and to make behind this axial stirring rake in the fermenting process stream add matrix in complete jar, to mix, can not cause local overrich and cross rare phenomenon, the fine mass transfer of energy, help microbial growth and metabolism, finally improve yield level or capable of reducing energy consumption.

Fig. 1 explanation: 1, outer leafs, 2, fixed plate, 3, bolt and nut, 4, bolt and nut, 5, inner wheel hub, 6, intra vane, 7, outer wheel hub.

The stirring rake of the utility model is applicable to:

1, all kinds of middle low viscosity fermented liquids (as organic acid, zymin, microbiotic etc.)

2, high viscosity non newtonian system (as microbial polysaccharide etc.)

3, high cell density fermentation (all kinds of streams add fermentation, as biodegradable plastic PHB etc.)

4, to shear sensitive system (as mycelium fermentation, animal vegetable tissue cultivation etc.)

Result of use is given an example:

The fermented liquid character leavened prod index of giving an example

Low viscosity PHB mixed effect 150%

Newton's system mass transfer coefficient 125%

Productive rate improves 10%

High viscosity glue connects polysaccharide fermentation cycle shortening 25%

Non newtonian system production concentration improves 15%

Watt consumption reduces by 30%

Middle low viscosity erythromycin is tired and is improved 5%

Non newtonian system energy consumption reduces by 20---and 30%

The jingganmycin energy consumption reduces by 20%

Fermentation period shortens 10%

Stirring is an example to adopt axially in 30 tons of abomacetin fermentation jars:

(1) energy-conservation 25%, every jar every batch fermentation energy-saving reaches 1900 yuan, and be 7.8 ten thousand yuan every jar of whole year

(2) tire and improve in 5%, every jar can be how 5 1,000,000,000, about 5000 yuan, 200,000 yuan of every jar of whole years;

By an abomacetin fermentation factory with 20 30 tons of fermentor tanks: energy consumption can be saved 1,560,000 yuan the whole year, erythromycin is sold and can be got 4,000,000 yuan more, and two amount to 5,560,000 yuan, and this does not need to increase the natural amylopectin material resources, technology does not need to do any change, and investment only needs about 400,000 yuan.

As seen after adopting axial stirring rake, the gained economic benefit is appreciable.

Claims (4)

1, the axial stirring rake of a kind of Hough formula, feature of the present utility model is that stirring rake oar body is made up of symmetric two halves, two halves are fastening by bolt and nut (4) by half slide structure by inner wheel hub (5), outer wheel hub (7) is fastening by bolt and nut (3) by the fixed plate (2) and the outer leafs (1) in its outside, by a Hough formula of the fastening formation of these twice stirring rake integral body, inner wheel hub (5) and outer wheel hub (7) are fixing by intra vane (6) welding, outer wheel hub (7) outside welding fixed plate (2), fixed plate (2) and outer leafs (1) are fastening by bolt and nut (3), this is fastening to have played fastening effect that outer wheel hub (7) two halves connect simultaneously, inner wheel hub (5) by the Hough anchor ear on stir shaft.

2, axial stirring rake as claimed in claim 1, its further feature are that outer leafs adopts high expanded area ratio blade, and quantity is 4---6.

3, axial stirring rake as claimed in claim 1, its further feature are that material adopts stainless steel.

4, axial stirring rake as claimed in claim 1, its further feature are that the stirring rake outside dimension is Φ 500-Φ 1600mm.

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