JPH0331116A - Subsidiary air feed method for pneumatic granule transport pipe - Google Patents

Abstract

PURPOSE:To improve transport efficiency by injecting subsidiary air supplied on the way of a pneumatic transport pipe for granule so as to be a swirling flow with swirling blades. CONSTITUTION:When subsidiary air is introduced from a subsidiary air feeding pipe 8 against granule moving in a pneumatic transport pipe 5, the subsidiary air is blown out guided with an air introducing part 9 through an air chamber 7 and swirling blades 12. As the subsidiary air is blown out in state of a swirling flown on this way, mixing of goods to be transported and air is improved, force feed capacity is enlarged, and efficient transport is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a method for supplying auxiliary air to a powder or granular material transport pipe when the powder or granular material is pneumatically transported using the transport pipe.

(Prior Art) Powdered materials, such as cement, are transported in bulk. As shown in FIG. 3, cement transported by a tank car 1 is pneumatically transported to a cement silo 3 via a transport pipe 2. The pneumatic transport in this case is a method of pumping the powder together with compressed air. However, since the material to be transported is powder or granular material, it is necessary to prevent clogging of the transport pipe. Therefore, an auxiliary air supply section (hereinafter referred to as a booster) is installed at a predetermined position in the middle of the transport pipe to ensure efficient transport. It's getting older.

(Problems to be Solved by the Invention) According to the above-mentioned conventional system, prevention of clogging of the transport pipe can be achieved for the time being by the extrusion pressure of compressed air and the booster. However, deposits are likely to be generated in horizontal pipe sections and diagonal pipe sections within transport pipes, so there has been a desire for an efficient pneumatic transport system.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for supplying auxiliary air to a powder air transport pipe, which allows efficient pneumatic transportation of powder and granules.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention supplies auxiliary air to a powder air transport pipe body (hereinafter referred to as an air transport pipe) to transport powder particles. In the auxiliary air supply method for transporting a body, auxiliary air is jetted out as a swirling flow through swirling vanes.

(Function) Therefore, by ejecting the auxiliary air as a swirling flow to the transported objects in the air transport pipe, it is sufficiently mixed with air, and adhesion and sedimentation inside the transport pipe can be prevented, resulting in efficient transport. becomes possible.

(Example) Examples will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment for explaining the method for supplying auxiliary air to an air transport pipe according to the present invention.

FIG. 2 is a partially cutaway perspective view.

In FIGS. 1 and 2, reference numeral 4 denotes a booster, and a booster having this type of structure is used by being attached to the middle part of an air transport pipe or the entrance part of a curved pipe.

The configuration of the booster will be explained below. The booster 1 consists of an air transport pipe 5 and a different diameter pipe 6 concentrically covered with the air transport pipe 5, with an air chamber 7 provided therebetween. Reference numeral 8 denotes an auxiliary air supply pipe provided on the pipe 6 of different diameters, and an air introduction passage 9 is provided inside the air transport pipe 5 around the air transport pipe 5, and an auxiliary air supply pipe 8 is also attached to match this inclination.

Note that the air introduction path 9 is spirally attached to the outer periphery of the air transport pipe 5. One end of the air chamber 7 is closed by a blind plate 1°, the other end, the outlet side 11, is open, and a swirling vane 12 is provided around the ejection part of the air chamber.

The operation will be explained based on the above configuration.

As described above, the booster 4 is attached to a predetermined position in the middle of the air transport pipe, and transports the powder from the right to the left in the air transport pipe 5 according to the solid arrow.

At this time, auxiliary air is taken in from the auxiliary air supply pipe 8 using the air introduction path 9 as a guide, passes through the air chamber 7, and is ejected into the air transport pipe 5 via the swirl vane 12. Of course, since the swirling vanes 12 are attached in accordance with the guide angle direction 9, the swirling flow of the ejected air is promoted.

The amount of auxiliary air mentioned above may be 10% to 50% of the air amount of the air transport pipe (main pipe), and if the auxiliary air is supplied from an air source separate from the air transport pipe (main pipe), The amount of air supplied can be adjusted using a pressure sensor in the transport pipe to achieve an economical amount of air usage.

[Effects of the Invention] As explained above, according to the present invention, the auxiliary air is ejected as a swirling flow, so that the following effects are achieved.

(a) The mixability of the transported material and air is further improved, and it is possible to prevent the adhesion and sedimentation of particulate matter inside the air transport pipe.

(b) By increasing the mixability of transported objects and air,
The pumping capacity is improved and the mixability when pumping several types of materials is improved.

(c) Since the amount of air supply can be adjusted according to the pressure loss within the air transport pipe, the amount of air used is economical and the power consumption can be reduced.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of an embodiment for explaining the auxiliary air supply method for an air transport pipe according to the present invention, Fig. 2 is a partially cutaway perspective view, and Fig. 3 is a transportation of cement in bulk. FIG.

Claims (3)

[Claims] (1) An auxiliary air supply method for transporting granular materials by supplying auxiliary air to the middle of a granular material-air transport pipe, characterized in that the auxiliary air is ejected as a swirling flow through swirling vanes. Supplementary air supply method for powder and granular air transport pipes. (2) The auxiliary air is taken in through a spiral guide into an air chamber installed concentrically with respect to the powder and granule air transport pipe. Auxiliary air supply method for pipes. (3) The auxiliary air supply for the powder and granular material air transport pipe according to claim 1, characterized in that the auxiliary air is sent out after adjusting the amount of air supplied by a transport speed and pressure sensor in the powder and granular material air transport pipe. How to care.