JPS59325A - Fluidized apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for the outlet of a container of fluidizable material, such as cement.

Containers of pulverulent and therefore fluidizable material are often provided with some type of fluidization device at their outlet to facilitate the release of the contents. This fluidizing device usually takes the form of a perforated plate or ring placed near and at a distance from the outlet so that air is admitted into the container to fluidize the material in the vicinity of the outlet. It can be implemented.

Since the perforated plate is annular, it may be replaced by a deformable rubber ring whose edge on the outlet side forms a gap allowing air to flow in towards the inner wall of the outlet. Since the rubber ring has a skirt-like appearance, the size of the gap formed during the air supply can vary significantly depending on various factors such as inlet air pressure and material load, and in some cases may even close the gap completely. Therefore, significant air pressure is required to open the gap and initiate fluidization. In addition to these disadvantages, the known devices require considerable maintenance costs to ensure satisfactory functionality. Furthermore, the cost of air supply compressors and the like increases significantly.

It is an object of the present invention to overcome or at least alleviate the disadvantages inherent in known fluidization devices.

In the present invention, a space is defined by a rigid wall while maintaining a distance from the discharge port, and this space is communicated with the inside of the container via a gap in the discharge port side of the space, and the space is connected to the gap between the discharge port and the container. This is accomplished by configuring the container to communicate with a fluid source for supplying fluid into the container via the container. The space extends around the discharge [1], and another air supply section is provided at at least one position separated from the space;
This separate air supply is shielded from the interior of the container by a rigid shielding plate which extends towards the outlet and becomes progressively wider towards the outlet 11. The outlet is located in an outlet cone fixed to the container wall via a ring, the height of the ring causes the circumferential surface of the outlet cone to protrude outward beyond the inside of the container, and a rigid annular shield is located inside the container. The continuation extends downwardly to the outlet cone to form the space. An annular shield plate 11+1 extends substantially parallel to the inside of the container and is then curved toward the inside of the outlet cone to form the gap.

The device of the invention greatly facilitates the release of contents from a container of fluidizable material. The gap formed is always constant and is largely independent of the material in the container, its filling level and the pressure of the fluidizing medium fed. Furthermore, the risk of clogging is extremely low.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 show in detail the outlet cone attached to the container l, only the lower end of which is shown in dashed lines. The reason why only a portion of the container is shown is that the shape of the container itself can be arbitrary in principle. The container l can also be fixed or mobile. In many cases, the vessel is configured as a pressure vessel. In addition, although various materials are assumed to be the contents of the container l,
Mainly targets materials that are in the form of fine powder or particles and are easily fluidized.

An outlet cone 2 is provided at the bottom of the container 1, and in the illustrated embodiment, this cone has the shape of an inverted truncated cone, and the portion corresponding to the circumferential surface of the truncated cone is formed of a metal plate. Since it is formed as a truncated cone, the outlet 3 is formed with a connecting circular flange 4 for attaching a shock absorber, a hose connection, etc. on the outside.

The conical portion 11 is fixed to the container via the ring 5 by welding and fixing the ring 5 to the inside thereof, and then welding and fixing the ring 5 to the outside of the lower edge of the container l. A shielding plate 6 made of a rigid material, preferably a metal plate of an appropriate thickness, extends downward from the inside of the ring 5 toward the discharge port 3 in a continuous manner with the inside of the container l. 7 is curved towards the inner wall of the outlet cone 2.

Between the inner wall of the outlet conical portion 2 and the edge of the curved portion 7 is a third
There is a narrow gap, which is shown in detail in the figure, which needs to be 1 ma+ in the illustrated embodiment.

As is clear from FIG. 2, the shielding plate 6 extends in an annular manner along the edge of the outlet cone, forming an annular space 9 having an air gap 8 extending over almost the entire interior of the curved portion 7. This annular space 9 may be communicated with a fluid supply source via a connecting pipe IO.

The fluid supply (not shown) typically comprises an air compressor or the like.

On the side of the conical part 2 opposite the connecting tube 10, there is provided another connecting tube 11, also for connection with a suitable fluid supply or a common fluid source with the connecting tube IO. The connecting pipe 11 opens inside the outlet conical part 2, and the discharged fluid from the connecting pipe 11 is blocked by a shielding plate 12 extending downwardly into the annular space 9 from above the opening of the connecting pipe 11 toward the discharge port 3. be done. As can be seen in particular from FIG. 2, the shielding plate 12 forms a gap 13 which widens towards the outlet 3. Since the shielding plate 12 and the gap 13 are configured in this way, the contents of the container 1 can be discharged more smoothly.

Not only is the fluidization very efficient, but also the device of the invention is suitable for use with heavy materials and materials with a high degree of wear.

[Brief explanation of drawings]

Fig. 1 is a top view of an outlet cone incorporating a device which is an embodiment of the present invention, and Fig. 2 is a side view showing the portion shown in Fig. 1 partially in section to clarify its detailed structure. , FIG. 3 is an enlarged sectional view of the gap portion. l... Container 2... Outlet conical part 3... Discharge part 4... Connection flange 5... Ring 6...
Shielding plate 7...Curved portion 8...Air, cap 9...Space lO...
Connecting pipe 11... Connecting pipe 12... Shielding plate 13
···gap

Claims (1)

[Claims] 1. A space (9) is defined by a rigid wall at a distance from the discharge port (3), and a gap (8) in a portion of the space (9) near the discharge port (3) is defined by a rigid wall. the space through the container (1)
of a fluidizable material, e.g. The device is provided at the outlet (3) of the container (1), and the space (8) is formed in a ring shape near the outlet (3), and the fluid is placed at at least one point away from the space (8). Another fluid inlet cap (13) having an inlet and extending towards the outlet (3) 3 and widening towards the outlet (3)
A device characterized in that said fluid inlet is isolated from the interior of the container (1) by a rigid shielding plate (12) forming a . , an outlet (3) is arranged in the outlet cone (2) fixed to the wall of the container (1) via a ring (5), said ring (
5) causes the peripheral surface of this outlet cone (2) to protrude outward from the inside of the container (1), and a rigid annular shielding plate (8)
) is the outlet cone (2) as a continuous part inside the container (1).
2. A device according to claim 1, characterized in that it extends downwardly towards and forms said space (8). , characterized in that a rigid annular shielding plate (8) extends approximately parallel to the inside of the container (1) and then curves towards the inside of the outlet cone (2) to form a gap (8). Apparatus according to claim 2.