CN2465792Y - Swept-back blade paddle mixing device - Google Patents

Abstract

The utility model relates to a stirring device with a backswept type blade, which is characterized in that the stirring device with the backswept type blade is designed according to the ratio of the length (or the height) H and the inner diameter D of a reaction still. A blade of the utility model is arranged on the lower end of a stirring shaft, an oblique blade is arranged in the middle of the stirring shaft and can be upward or downward moved and regulated following the requirements of stirred materials, and baffle plates are fixed around the wall of the reaction still. The utility model has the advantages of stronger shear force and little power consumption and can be used for complex reacting systems with high viscosity or abrupt change viscosity.

Description

Blade swept-back agitating device

The utility model relates to a kind of reactor and blade swept-back agitating device is set in reactor.

In the reactor of synthetic polymer, traditional synthesis reaction vessel draw ratio be not bigger than normal be exactly less than normal, often cause axially or radially mixed effect is not good, sharply change and need more difficult the meeting the demands of the stage of reaction of granulating for viscosity.The agitator of reactor has push type, anchor formula, oar formula and turbine type etc.; Propeller agitator forms axial circulation and flows, the radial flow moment, be applicable to low viscous liquid agitation, anchor agitator stirring scope is big, but rotating speed is low, shearing force is little, be applicable to the slow-revving reaction system of high viscosity, dasher such as oblique oar have certain axial and Radial Flow, have stronger shear action, dispersion effect is good, but power consumption is big, flat oar formula axial flow moment, the existing Radial Flow of turbine type agitator, axial flow is arranged again, shearing force is bigger, and the volume internal circulating load is big, is applicable to liquid-solid suspension and promotes good heat radiation, but power consumption is bigger, stirring (mixing) effect in these reactors is all undesirable, and especially to the full-bodied suspended dispersed of polymer, and sticking wall effect can not get solving preferably.

The purpose of this utility model is to provide a kind of blade swept-back agitating device that is suitable for reacting complex system at the deficiencies in the prior art, be characterized in that this agitating device designs with the ratio of inside diameter D by reactor long (or high) H, have stronger shearing force, energy consumption is low, can be widely used in the synthetic reaction field of polymer.

The purpose of this utility model is realized by following technical measures.

Blade swept-back agitating device is by the ratio H of reactor long (or high) H with inside diameter D: D=1: 1～1.3 and design, and blade swept-back agitating device is by shaft (1), swept-back stirrer paddle (2), tiltedly blade (3) and baffle plate (4) composition.Swept-back stirrer paddle (2) is installed in the lower end of shaft (1), and tiltedly blade (3) is installed in the centre of shaft (1), and tiltedly blade is along with the requirement that is stirred material can move up or down adjustment.Baffle plate (4) is fixed on around the still wall, and baffle plate is wide $J=\frac{1}{16}~\frac{1}{10}D,$ From still wall gap $C=\frac{1}{30}~\frac{1}{20}D$ 。

Swept-back stirrer paddle (2) diameter d=0.4～0.7D, blade is wide $b=\frac{1}{16}~\frac{1}{10}D,$ Blade angle of sweep α=40～50 °, rake angle β=30～50 °, blade upper uplifting angle θ=5～20 °.

Oblique diameter of propeller blade (3) diameter d ₁=0.4～0.7D, tiltedly blade is wide $b_1=\frac{1}{30}~\frac{1}{15}D,$ Oblique leaf angle of inclination beta ₁=30～50 °.

Blade swept-back agitating device is applicable to the reaction complex system of high viscosity or viscosity sudden change, and especially being suitable for water is the synthetic granular benzoxazine intermediate of medium, suspension method.

Concrete structure of the present utility model is provided by following examples and accompanying drawing:

Fig. 1 is a blade swept-back agitating device structural representation.

1 shaft, 2 swept-back stirrer paddles, 3 oblique blades, 4 baffle plates

Fig. 2 is the AA cutaway view

Fig. 3 sets level state diagram for the swept-back stirrer paddle

Fig. 4 upwarps state diagram for the swept-back stirrer paddle

Fig. 5 is swept-back stirrer paddle heeling condition figure

Blade swept-back agitating device is applicable to the reaction complex system of high viscosity or viscosity sudden change, and especially being suitable for water is the synthetic granular benzoxazine intermediate of medium, suspension method.

Embodiment

Below by embodiment the utility model is carried out concrete description, but embodiment is not regarded as the restriction of the utility model protection domain.

Blade swept-back agitating device is the ratio H of length (or high) H and inside diameter D by reactor: D=1: 1～1.3 and design, and blade swept-back agitating device is by shaft 1, swept-back paddle 2, tiltedly blade 3 and baffle plate 4 are formed.The swept-back blade 2 of blade swept-back agitating device is installed in the lower end of shaft 1.Tiltedly blade 3 is installed in the centre of shaft 1, and tiltedly blade is along with the requirement that is stirred material can move up or down adjustment.On baffle plate 4 was fixed on around the still wall, baffle plate was wide $J=\frac{1}{16}~\frac{1}{10}D,$ From still wall gap $c=\frac{1}{30}~\frac{1}{20}D$ 。

Swept-back diameter of propeller blade d=0.4～0.7D, blade is wide $b=\frac{1}{16}~\frac{1}{10}D,$ Blade angle of sweep α=40～50 °, rake angle β=30～50 °, blade upper uplifting angle θ=5～20 °.

Oblique diameter of propeller blade d ₁=0.4～0.7D, tiltedly blade is wide $b_1=\frac{1}{30}~\frac{1}{15}D,$ Oblique rake angle β ₁=30～50 °.

Wherein, reactor is an asthenic, and stirrer paddle serves as preferred with three blade swept-backs, and blade is formed by garden pipe compacting, and this will relax too high shearing force makes material be unlikely to caking, knot cake.Baffle plate is made by flat tube, and baffle plate is good by positive angular distribution, and the optional baffle plate flat tube of thermometer is made sleeve pipe.

The utlity model has following advantage:

1. have the strong characteristic of oblique oar formula shearing force, thereby twisting, dispersion are mixed fully.

2. simple in structure, easily manufactured, energy consumption is low, the high complex system that is applicable to the sudden change of high viscosity or viscosity of efficient. Especially The reaction complex system that it is suitable for take water to medium, suspension method is produced granular benzoxazine intermediate and synthesis technique thereof, effect Fruit is more remarkable.

Claims (3)

1. blade swept-back agitating device, contain axle, blade and baffle plate, it is characterized in that this device is the ratio H of length (or high) and inside diameter D by reactor: D=1: 1～1.3, and design, blade swept-back agitating device is by shaft (1), swept-back stirrer paddle (2), tiltedly blade (3) and baffle plate (4) are formed, swept-back stirrer paddle (2) is installed in the lower end of shaft (1), tiltedly blade (3) is installed in the centre of shaft (1), tiltedly blade is along with the requirement that is stirred material can move up or down adjustment, and baffle plate is fixed on around the still wall, and baffle plate is wide $J=\frac{1}{16}~\frac{1}{10}D,$ From still wall gap $C=\frac{1}{30}~\frac{1}{20}D$ 。

2. according to the described blade swept-back of claim 1 agitating device, it is characterized in that swept-back stirrer paddle (2) diameter d=0.4～0.7D, blade is wide $b=\frac{1}{16}~\frac{1}{10}D,$ Blade angle of sweep α=40～50 °, rake angle β=30～50 °, blade upper uplifting angle θ=5～20 °.

3. according to claim 1 or 2 described blade swept-back agitating devices, it is characterized in that oblique blade (3) diameter d ₁=0.4～0.7D, tiltedly blade is wide $b_1=\frac{1}{30}~\frac{1}{15}D,$ Oblique rake angle β ₁=30～50 °.

Images