JPH0250360B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transport and discharge device that can easily transport a highly viscous substance having thixotropic properties despite its high viscosity.

Traditionally, it has been difficult to mechanically transport or fill pigment slurries and other highly viscous substances into dryers and various containers, and it has been almost impossible to transport them, especially when using relatively small diameter transport pipes. . Therefore, conventionally, it has been necessary to add water or a solvent to these highly viscous objects to reduce their viscosity to a level that allows transport. However, such a viscosity reduction is not only operationally complicated but also very uneconomical.

As a result of intensive research to solve the above-mentioned drawbacks of the prior art, the inventor of the present invention discovered that when transporting a highly viscous object, by installing a vibrating body in the transport route, transporting a highly viscous object is almost impossible. The present invention was completed by discovering that it is possible to transport hot, highly viscous objects.

That is, the present invention includes a long vibrating body that is vibrated by a vibrator over the entire length of the transport pipe, which is inserted into a fixed transport pipe for transporting a highly viscous substance having thixotropy, and also This is a device for transporting and discharging a highly viscous substance having thixotropy, characterized in that the distal end of the body protrudes a little from the discharge port of the transport pipe.

The present invention focuses on the thixotropic phenomenon in which a highly viscous object has low fluidity in a stationary state, but increases in fluidity when vibration energy is applied to it, and the thixotropic phenomenon is
without giving vibration to transport equipment such as transport pipes,
It is characterized by the fact that it is directly expressed in highly viscous substances that exist within transportation equipment.

Therefore, according to the present invention, it is possible to transport objects with a viscosity that is difficult to transport in the past, even if the diameter is several millimeters, without damaging the transport device or various attached devices due to vibration. A remarkable effect can be obtained in that it can be easily transported even in small tubes.

The present invention will now be described in more detail with reference to the accompanying drawings, which illustrate one embodiment of the present invention. FIG. 1 is an overall conceptual diagram of a spray dryer using the apparatus of the present invention, FIG. 2 is a partial sectional view illustrating the part A in FIG. 1, and FIG. It is a partial sectional view explaining the tip part of the nozzle of a dryer. As shown in the figure, a vibrator 1 is swingably fixed to a structure 8, connected to a vibrating body 2, and applies vibration to the vibrating body 2 at an arbitrary frequency (preferably 40 Hz or more). Here, the vibrating body 2 passes through the hopper 3, the transport pipe 4, and a nozzle (for example, a two-fluid nozzle, a high-pressure nozzle, a rotating spray plate, etc.) constituting a part of the transport pipe, and discharges the raw liquid in the nozzle tip 7. It reaches near the outlet 9, and in some cases, it may be configured to protrude from the stock solution outlet 9 as shown in FIG. With the vibrating body 2 having such a configuration,
The high viscosity object is placed between the vibrating body 2 and
Fluidity is maintained by receiving appropriate vibrations from the flow path, and the flow path itself is not damaged by the vibrations. As long as the vibrating body 2 can effectively transmit vibrations to objects existing in the flow path,
It may have any shape such as a line, rod, cylinder, prism, spiral, or hollow body, and may be made of any rigid material such as metal ceramics or plastic. Moreover, although it is shown in a straight line in FIGS. 1 to 3, when the transport pipe 4 is curved, it may also be curved along the curved shape.

Further, the transport pipe 4 in the present invention may be made of any material such as metal, plastic, or rubber, and its shape is not particularly limited. For example, inner diameter 2-3
It is effective for everything from small tubes with an inner diameter of 100 mm to large diameter tubes with an inner diameter of several tens of centimeters to several meters, and in the case of large diameter tubes, a plurality of vibrating bodies can be included.

Next, we will explain an example in which the illustrated apparatus of the present invention is used for transporting a pigment press cake that has a low moisture content and exhibits almost no fluidity under normal conditions.
By charging a predetermined amount of press cake into the hopper 3 by any means and operating the vibrator 1, vibrations are transmitted to the press cake through the vibrating body 2, the press cake becomes fluid, and the transport pipe 4 and reaches the nozzle tip 7. At this time, since the vibrating body (2) is operating throughout the transportation route, the press cake does not lose its thixotropic properties and solidify midway. At the nozzle tip 7, the outflowing press cake is atomized into fine particles by the high-speed hot air from the hot air pressure feeding means 5, and the moisture is vaporized in the spray dryer drying chamber 6. Thereafter, dry pigment particles are recovered according to a conventional method. be done.

In the above, by connecting the vibrator 1 and the hopper 3 with another rigid material (not shown), or by installing another vibrator (not shown) in the hopper, the hopper can be removed together with the vibrator 2. Fluidization of the press cake in the hopper 3 can be promoted by applying vibration to the hopper 3 itself.
In this case, in order to prevent the vibration of the hopper 3 from being transmitted to the transport pipe 4 and the spray dryer drying chamber 6, a suitable vibration isolation member (not shown), such as a pressure-resistant rubber tube, is installed between the hopper 3 and the transport pipe 4. It is necessary to intervene. Further, in order to facilitate transportation of the press cake in the hopper 3 that has been fluidized by vibration, it is also preferable to seal the hopper 3 and apply pressure with high-pressure gas.

By doing the above, conventionally, when spray drying a pigment press cake, the press cake was made fluid by adding water again to the press cake, and then the press cake was spray dried, which made the operation easier. Although it was complicated and required a large amount of thermal energy to vaporize a large amount of water, the present invention has solved all of the drawbacks of the prior art.

The above example is merely an example for explaining the present invention, and does not limit the present invention in any way.
That is, the apparatus of the present invention is not limited to press cakes of pigments, but can be used, for example, with press cakes of various industrial powders, slurries, press cakes of powders in various mining industries, food pastes, various sludges discharged from factories, and paints. It is clear that the same effects as in the above embodiments can be achieved in transporting all kinds of highly viscous substances having thixotropy, such as highly viscous resin liquids such as ink and ink.

As described above, according to the present invention, vibration is applied to any location within the transport pipe and also to a location slightly outside the discharge port of the transport pipe, so that the material solidifies under normal conditions like a press cake and becomes fluid. Even if the object exhibits little to no viscosity, it can be transported and discharged reliably and easily by maintaining fluidization at any point along the entire length of the transport pipe and slightly outside the discharge port, and furthermore, the transport pipe itself is fixed. Therefore, there is no need for flexible joints, etc. which are required when the transport pipe is vibrated, and there is no fatigue of the transport pipe caused by the vibration of the transport pipe, and the pipe can withstand long-term use.

[Brief explanation of the drawing]

FIG. 1 is an overall conceptual diagram of a spray dryer using the device of the present invention, and FIG.
FIG.
The figure is a partial sectional view illustrating the tip of the nozzle. 1... Vibrator, 2... Vibrating body, 3... Hopper, 4... Transport pipe, 5... Hot air blast pipe, 6... Spray dryer drying chamber, 7... Nozzle tip,
8... Construct, 9... Stock solution discharge port.

Claims (1)

[Claims] 1. A long vibrating body vibrated by a vibrator is inserted over the entire length of the transport pipe into a fixed transport pipe for transporting a highly viscous substance having thixotropic properties, and the tip of the vibrating body is A device for transporting and discharging a highly viscous substance having thixotropy, characterized in that the device protrudes a little from the discharge port of the transport pipe.