JPS607529B2 - Continuous high viscosity substance processing equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention efficiently removes and renews the surface of high-viscosity substances, while
It relates to equipment for continuously performing processes such as chemical reactions or concentration.

In equipment for processing high viscosity materials, equipment for the final polymerization step in the production of Tarema polyester, high viscosity reactants are thoroughly absorbed to prevent localized heating, and the surface of the reactants is must be constantly updated to facilitate removal of by-products.

In addition, in order to narrow the distribution of the residence time of reactants in the device,
There should be no locations where reactants may adhere or stagnate, and it is preferable to minimize back mixing. Conventionally, in the production of polyester, a horizontal biaxial heavy integrated reactor has been used, in which a large number of rotating disks are attached alternately to two rotating shafts; Since the undivided parts are continuous, there are drawbacks such as back mixing of the substances to be treated and poor mixing in the radial direction.

Other devices are known in which rotating blades each having a through hole in the rotating shaft are mounted radially with the blade surface parallel to the axial direction (see Japanese Patent Publication No. 54-2616). The problem of back mixing has not been solved because the area partitioned perpendicularly to the axial direction is narrow.

Therefore, the inventors of the present invention tried to solve the above-mentioned drawbacks and as a result of intensive studies, they completed the present invention.

That is, the present invention provides an apparatus for continuously processing high viscosity substances, which is installed substantially horizontally and has an inlet for the substance to be treated on one side and an outlet on the other side. A rotating shaft that rotates at the same speed in opposite directions is provided, and a plurality of three-lobed rotating blades are attached perpendicularly to the rotating shaft, and when viewed from the direction of the rotating shaft, the three-lobed rotating blade is centered on the rotating shaft. This is a continuous high-viscosity material processing apparatus characterized in that the rotary blades are radially oriented at an angle of 120 degrees to each other, and the rotary blades attached to one shaft mesh with the rotary blades attached to the other shaft. In the device of the present invention, the shape of the rotating blade is such that three leaves are arranged radially at 120 degrees each other around the rotation axis.
o angle, and the rotating blades attached to two shafts should be in mesh with each other with an appropriate gap, but it is preferable that the area partitioned by the rotating blades be as wide as possible when viewed from the direction of the rotating shaft. preferable.

Note that the rotating blade may have a through hole. Further, it is desirable that a lantern blade is attached to each of the three leaves of the rotary blade, and the lantern blade may be connected to the front and rear rotary blades and may be rod-shaped and parallel to the rotation axis. In order to prevent back mixing, the bottom of the apparatus of the present invention preferably follows the axis of rotation of the rotary blades, with a gap of approximately 5 to 5 mm.

Next, the present invention will be explained in detail using the drawings.

Figure 1 shows a longitudinal cross-sectional view of a conventional horizontal biaxial polycondensation reactor in which rotating disks are installed alternately, and Figure 2 shows
FIG. 2 is a cross-sectional view of the reactor shown in the figure.

The reactor wall 1 is heated by a heating jacket 7. Two rotating shafts 2 are installed, and although not shown, one end of one of the two shafts is usually connected to a drive device, and the other shaft is moved, and the direction of rotation is from inside to outside. are rotating in opposite directions. The reactant is supplied through the supply pipe 5 and is pushed out to flow toward the discharge pipe 6. 3 indicates a rotating disk, and 4 indicates a key group wing.

In FIG. 1, the flow direction of the reactants is indicated by double arrows, and it can be seen that back-mixing occurs in areas not partitioned by the rotating disk. FIG. 3 shows a reactor equipped with the three-lobed rotary vane of the present invention, and FIG. 4 is a cross-sectional view in the opposite direction.
FIG. 5 is an axial cross-sectional view of another embodiment of the device according to the invention.

3 indicates a three-lobed rotating blade, 4 indicates a fly swarm, and 8 indicates a through hole.

By using the apparatus of the present invention having the above configuration, there is less back-mixing of the substances to be treated, and the surface area is larger than that of a rotating disk, and the surface renewability is good, so the volumetric efficiency is improved and there is no dead space stagnation. Therefore, thermal deterioration of the material to be processed is reduced, and good radial mixing allows for good heat removal, making it very effective as a device for continuous processing of high viscosity materials.

The effects of the present invention will be demonstrated below using Examples.

EXAMPLE The apparatus shown in FIGS. 1 and 3 was operated using starch syrup with an absolute viscosity of 240 poise and 2000 poise, and the capacity coefficient and equivalent number of tanks were measured.

The rotating disk in FIG. 1 and the rotating blade in FIG. 3 each had one diameter and a rotation speed of 15 rpm.
The capacity coefficient was calculated from the absorbed amount of sodium carbonate dissolved in starch syrup and carbon dioxide gas passed through the apparatus. The higher the value, the more active the surface renewal is. For the equivalent number of tanks, tracer is dissolved in starch syrup, supplied in pulses from the inlet, and sampled from the starch syrup that is discharged from the outlet.
It was calculated from the response curve obtained by quantifying the tracer in starch syrup. In other words, the flow characteristics of the device are approximated by a multi-stage complete mixing tank and evaluated based on the number of tanks.The higher the value, the closer the flow characteristics of the device are to piston flow, and the better the volumetric efficiency of the device. ing. The following results are shown in Table 1. Table 1 As is clear from Table 1, the device equipped with the trilobal rotary vanes of the present invention has better surface renewability than the conventional device, and also has less backmixing and is close to piston flow. .

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a conventional biaxial polycondensation reactor in which rotating disks are attached alternately, and FIG. 2 is an axial sectional view thereof. FIG. 3 is a longitudinal cross-sectional view of a reactor equipped with a three-lobed rotary vane of the present invention, FIG. 4 is a cross-sectional view of the reactor in the direction of the bag, and FIG. 5 is a cross-sectional view of another embodiment of the apparatus of the present invention in the axial direction. . 1: Reactor wall,
2: Rotating shaft, 3: Rotating blade, 4: Haji trunk wing, 5: Inlet, 6
: Outlet, 7; Heat medium jacket, 8: Through hole. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. In an apparatus for continuously processing high viscosity substances, two parallel and horizontal same speed A rotating shaft that rotates in opposite directions is provided, and a plurality of three-lobed rotating blades are attached perpendicularly to the rotating shaft, and the three-lobed rotating blades rotate radially to each other around the rotating shaft when viewed from the rotating shaft direction. 1. A continuous high-viscosity material processing device having an angle of 120°, wherein a rotating blade attached to one shaft meshes with a rotating blade attached to the other shaft.