JPS6238003B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in centrifugal extractors.

Some centrifugal extractors are constructed as shown in FIG. That is, a rotating cylinder 2 is housed concentrically within a cylindrical casing 1, and a shaft 3a of a motor 3 passing through the upper end wall of the casing 1 is connected to the center of the upper end plate of the rotating cylinder 2.

A liquid supply chamber 6 is connected to the lower part of the casing 1 via a partition wall 5 having a guide tube 4 in the center, which will be described later.
is provided. The guide cylinder 4 has an upper end opening engaged with the center of the bottom surface of the rotating cylinder 2, and a lower end opening whose diameter decreases downwardly projects into the liquid supply chamber 6.

Inside the rotating cylinder 2, there are four baffle plates 7 arranged at 90° intervals in the circumferential direction, a lower flange 9 terminating near the inner circumference of the rotating cylinder 2 and forming a weir 8 for heavy liquid, and a lower flange 9 in the radial direction thereof. A cylinder 11 that forms a weir 10 for light liquid inside and a weir component 13 having an upper flange 12 extending from the upper end of the cylinder 11 to the inner periphery of the rotating cylinder 2 are provided.

On the side wall of the rotating cylinder 2, a heavy liquid outlet 14 is provided between the upper and lower flanges, and a light liquid outlet 15 is provided between the upper flange and the upper end plate of the rotating cylinder.

In addition, a guide cylinder 4 is provided at the center of the lower end plate of the rotating cylinder 2.
A suction vane 16 located near the lower end is fixed.

Furthermore, a heavy liquid supply pipe 17 is provided at the center of the bottom surface of the liquid supply chamber 6 and terminates close to the opening of the guide cylinder 4, and a light liquid supply pipe 18 is provided at an eccentric position and terminates above the heavy liquid supply pipe 17. be.

In FIG. 1, reference numeral 19 indicates a heavy liquid receiver, 19a a discharge pipe, 20 a light liquid receiver, and 20a a discharge pipe.

In the centrifugal extractor configured as described above, both heavy and light liquids sucked from the liquid supply chamber 6 by the suction blade 16 are mixed and stirred within the guide cylinder 4, and enter the rotating cylinder 2 while the extraction proceeds. Within this rotating cylinder, the heavy liquid collects radially outward and the light liquid collects inward, and the heavy liquid enters the receiver 19 via the weir 8 and the opening 14.
Discharged from the discharge pipe 19a, the light liquid enters the receiver 20 via the weir 10 and the opening 15, and is discharged from the discharge pipe 20.
It is discharged from a.

The radial positions of the weirs 8 and 10 are calculated from extraction conditions such as the density ratio and flow rate ratio of both light and heavy liquids, and these are fixed with respect to the rotating cylinder 2.

Therefore, with this type of centrifugal extractor, the extraction conditions cannot be changed, and if the extraction conditions differ from the design standards, it will be difficult to separate the light and heavy liquids, so it is necessary to adapt to the new extraction conditions. It is necessary to manufacture a rotating cylinder that will

The present invention was made based on the above-mentioned circumstances, and an object of the present invention is to obtain a centrifugal extractor that can easily adapt to changes in extraction conditions.

In the present invention, the above object is achieved by making the weir for light liquid replaceable.

The invention will be explained in detail below with reference to the drawings. In FIG. 2, in which the same parts as in FIG. A light liquid weir forming ring 22 having an engaging step portion 22a is detachably attached. 23 indicates a mounting bolt.

In the centrifugal extractor of the present invention having the above configuration, extraction and separation of both light and heavy liquids are performed in the same manner as in conventional extractors.

In the present invention, since the light liquid weir forming ring 22 is detachable, it is possible to change the extraction conditions by replacing the ring with a ring having a different inner diameter.

Therefore, there is no need to manufacture a separate rotating cylinder each time the extraction conditions differ, which is very advantageous.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional centrifugal extractor, and FIG. 2 is a sectional view of an embodiment of the present invention. 1... Casing, 2... Rotating cylinder, 8... Weir for heavy liquid, 9... Lower flange, 10... Weir for light liquid, 11... Cylinder, 12... Upper flange, 1
3... Weir constituent member, 22... Weir forming ring for light liquid.

Claims (1)

[Claims] 1 At the top of the rotating cylinder housed in the casing,
It includes an annular plate-shaped lower flange that terminates near the inner circumferential surface of the rotating cylinder and forms a weir for heavy liquid, a cylinder that stands upright from the inner circumference and is concentric with the rotating cylinder, and an upper flange that extends from the upper end of this cylinder to the inner circumference of the rotating cylinder. 1. A centrifugal extractor having a weir component, characterized in that a light liquid weir forming ring is detachably attached to the upper flange concentrically with the cylinder.