JPH01104330A - Ribbon type agitator - Google Patents

Abstract

PURPOSE:To carry out a uniform agitation and mixing, by pushing down a spot at the boundary between gas and liquid, where fluids tend to stagnate, caused by the rotation of a ribbon type agitating vane in an agitation vessel, by means of a scraping vane which is twisted in a direction opposite to that of an agitating vane. CONSTITUTION:When two agitating vanes 2 having a same helical shape, which are twisted in the same direction and extended downwardly along the inner wall of an agitation vessel 1, are rotated, fluids in the vessel 1 are scraped upwardly by the agitating vanes 2 along the inner wall due to the frictional resistance, while a part of said fluids rises as high as the top of the vanes 2, most of which flows toward the central portion of the vessel 1 by head difference, with a part thereof, however, stagnating there. Since scraping vanes 3 which are twisted in a direction opposite to that of the agitating vanes 2 are secured to a rotation axis 5 with the highest portions thereof positioned higher than the highest portions of the agitating vanes, the stagnating fluids are pushed down to be mixed with other fluids.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ribbon-type stirring device that eliminates the accumulation of fluid near the gas-liquid interface in a stirring tank.

[Conventional technology]

Conventional ribbon-type stirring devices perform stirring by rotating stirring blades extending in the form of a spiral ribbon.

[Problem that the invention seeks to solve]

In the conventional apparatus described above, when handling fluids that tend to stagnate at the gas-liquid interface near the inner wall of the stirring tank t, such as high viscosity fluids, local stirring failure occurs, and when reactions occur, local unreacted zones may occur.

The present invention aims to solve the above-mentioned problems and make it possible to uniformly stir and mix fluids in a stirring tank.

[Means for solving problems]

The present invention comprises a spirally twisted ribbon type stirring blade rotated by a rotating shaft, and a scraping blade spirally twisted in the opposite direction to the stirring blade, and the scraping blade is a ribbon type stirring blade. The present invention relates to a ribbon type stirring device which is connected to a rotating shaft and whose top part is located above the top part of a ribbon type stirring blade.

[Effect]

The present invention is constructed as described above, and the fluid flows upward through the spiral ribbon type stirring blade rotated by the rotating shaft, and the fluid rises above the top of the stirring blade.

Most of this rising fluid flows toward the center due to the head difference, but stagnation occurs in the negative part. A scraping blade twisted in the opposite direction to the stirring blade is attached to the rotating shaft so that the top of the scraping blade is located above the top of the stirring blade. By rotating in the same direction, the accumulated fluid is pushed downward, and the fluid accumulation is eliminated.

Thus, according to the present invention; the fluid is uniformly stirred without stagnation.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

1 is a stirring tank, and 2 is twisted in the same direction along the inner wall of the stirring tank 1, has the same shape, and extends downward in a spiral shape.
A glue-bon type stirring blade 2.2 is provided. Stirring tank 1
Two stirring blade shafts 7, 7 are attached to the ends of a connecting shaft 6 extending horizontally in opposite directions from a vertical rotating shaft 5 provided at the upper center of the The stirring blade 2.2 is attached so as to do so.

Further, the two scraping blades 3, 3, which are spirally twisted in the opposite direction to the stirring blade 2.2, are attached to the connecting shafts 8, 8, which are provided on the rotating shaft 1 and extend horizontally in opposite directions. It is attached to a scraping blade +f4j 9.9 attached to the end and extending downward. The top of the same scraping blade 3.3 is the stirring blade 2.
．． The present invention is constructed as described above. Therefore, stirring blade 2
．． When the stirring tank 1 is rotated, the fluid in the stirring tank 1 is stirred upward by the frictional resistance with the inner wall of the stirring tank 1 and the stirring blade 2.2 which is twisted so that the fluid can be stirred upward. It reaches the top of the blade 2.2 and rises. Most of the fluid in this raised area flows toward the center of the stirring tank 1 due to the head difference, but a portion remains. This rising fluid is pushed down by the scraping blades 3, 3, which are twisted so as to push the fluid downward, and the frictional resistance of the inner wall of the stirring tank 1, and mixed with other fluids. As a result, fluid stagnation is eliminated and the entire fluid in the stirring tank 1 is stirred and mixed well.

〔Effect of the invention〕

To achieve uniform agitation, the present invention uses a scraping blade to push down the area where fluid tends to accumulate on the gas-liquid interface, such as near the inner wall of the stirring tank, caused by the rotation of the stirring blade in a ribbon type stirring device. Mixing can be done.

Therefore, when handling high viscosity fluids, it is possible to prevent insufficient stirring or the occurrence of local unreacted zones due to this.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is a plan view thereof.

Claims (1)

[Claims] It is equipped with a spirally twisted ribbon type stirring blade that is rotated by a rotating shaft, and a scraping blade that is spirally twisted in the opposite direction to the stirring blade, and the scraping blade is connected to the rotating shaft of the ribbon type stirring blade. What is claimed is: 1. A ribbon-type stirring device, characterized in that the top of the ribbon-type stirring blade is located above the top of the ribbon-type stirring blade.