JPS632107Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a centrifugal separator, and particularly to a centrifugal separator suitable for treating waste liquid from shochu production and the like.

[Prior art and its problems]

Traditionally, in fields such as sewage treatment and industrial wastewater treatment,
A centrifugal separator as shown in FIG. 1 has been used to perform solid-liquid separation. In this centrifugal separator, the treated liquid is separated as described below. First, the bowl 1 and the screw conveyor 22 with blades are rotated at high speed with a certain rotational speed difference, and the liquid supply pipe 11 is connected to the liquid injection hole 1 from the liquid supply port 16.
Processing liquid is supplied into the bowl through 7. This treatment liquid is subjected to a centrifugal force of more than 1000G, and the solid content (sludge) rapidly settles on the inner wall of the bowl, and the liquid forms a clear liquid layer inside. Since the screw conveyor has a rotation difference with respect to the bowl, the settled solids are carried by the screw conveyor blades 7 toward the inclined part 23 of the bowl, where they are dehydrated and then through the solid content discharge hole 18. be discharged. The liquid layer overflows and is discharged from the cylindrical end of the bowl opposite to the inclined portion 23.

However, such conventional centrifugal separators have the following drawbacks. First, it is preferable to select the optimal angle of inclination of the inclined part depending on conditions such as the type of liquid to be treated and the nature of the solid content, but the bowl part of conventional centrifuges is integrated. However, in order to change the inclination angle, the entire bowl must be replaced, which is very time consuming and costly. Second, solid content is not completely prevented from being discharged from the drain side. Third, when processing high temperature liquids, the screw blades thermally expand and come into strong contact with the inner surface of the bowl.

Particularly in cases such as shochu production, where the properties of the waste liquid to be treated vary depending on the type of raw materials, production time, etc., and the temperature of the waste liquid is as high as approximately 80°C,
It was necessary to solve these shortcomings in order to perform sufficient processing.

[Purpose of invention]

The purpose of the present invention is to overcome the drawbacks of the conventional centrifuges mentioned above, and this purpose is achieved by the centrifuge according to the present invention.

[Structure of the idea]

A centrifugal separator according to the present invention is shown in FIGS. 2-4.
Hereinafter, the present invention will be explained in detail based on these drawings.

In conventional centrifuges, the solid content outlet side inclined part 23 is formed by the inner wall of the bowl itself (see Fig. 1), but in the centrifugal separator of the present invention, the inclined part 23 on the solid content outlet side is formed by the inner wall of the bowl itself, but in the centrifugal separator of the present invention, the inclined part 23 on the solid content outlet side is formed by the inner wall of the bowl itself. It is formed by fitting a hollow truncated cone (hereinafter referred to as a beach cone) 4 into the bowl 1. In addition, in conventional centrifuges, the separated liquid outlet side is cylindrical, but in the centrifugal separator of the present invention, a replaceable beach cone 5 is attached to the bowl 1 on the separated liquid outlet side. A sloped portion 24 is formed.

Although a bowl and a beach cone are shown in FIG. 3, beach cones 4 and 5 are installed in the bowl 1 to form a solid content outlet side slope and a separated liquid outlet side slope. For the same bowl,
Beach cones with various inclination angles can be attached to accommodate changes in the properties of the processing liquid. Furthermore, a spiral groove 25 is cut into the inner surface of the beach cone and the center of the bowl to prevent solids from rotating together.

In the screw conveyor shaft 6 with blades that passes through both of these inclined parts and the bowl, a swing-off plate 14 and a lead screw 15 are provided in place of the blades 7 in the part inside the separated liquid outlet side inclined part 24. It is provided. FIG. 4 shows this swinging plate and lead screw in more detail.
Figure 4a is a diagram of the swinging plate viewed from the center in the axial direction (the arrow indicates the direction of rotation), Figure 4b is a diagram viewed from a direction perpendicular to the axis, and Figure 4c is a cross-sectional view. . The circumferential ring cross section of the swinging plate is the 4th d
As shown in the figure, there is a gap between the beach cone 5 and the beach cone 5. A lead screw 15 is provided in this gap. The lead screw 15 is made by winding several elongated members in a spiral shape around a swing-off plate as shown in Fig. 4b (Fig. 4b shows the case of four members), and the lead angle (swing-off Mount at an angle of 30° or less.

The swinging plate 14 has an appropriate number of arms 28 (eight in the illustrated example) extending radially from a hollow cylindrical member 27 that defines a center hole 26 for fitting into the screw conveyor shaft 6; A circumferential ring 2 shaped to connect the ends of the arms 28
9, and an appropriate number of swinging plates (four in the illustrated example) are provided.

As can be seen from FIGS. 4c and 4d, this circumferential ring 29 has a substantially triangular cross section that increases in wall thickness toward the separated liquid outlet side, and its long side, the ring slope 30, is It is better to have a slightly curved surface.

The AA cross section of the arm portion of the swinging plate 14 is the fourth
As shown in figure e, the cross section has an inclined portion in the direction of rotation indicated by the arrow.

The screw conveyor blades 7 are configured to have a curvature.

The swinging plate, lead screw, and screw conveyor are all configured to be replaceable.

[Action and effect]

The centrifugal separator of this invention, like the conventional one,
The bowl drive pulley 9 and screw conveyor drive pulley 10 of different diameters provide the bowl 1 and the screw conveyor shaft 6 with different high rotational speeds. The processing liquid is supplied into the machine from a liquid jet hole 17 through a non-rotating liquid supply pipe 11 built into the shaft 6. Solid-liquid separation is performed inside the machine as described above, but since the beach cone is replaceable, processing can be carried out using a beach cone and screw conveyor with an optimal tilt angle depending on the properties of the processing liquid. I can do it.

The separated liquid moves toward the separated liquid outlet, and the solids still contained therein are removed from the separated liquid at the inclined part on the separated liquid outlet side. That is, the rotation of the liquid is accelerated by the shaking plate 14, and the solid content is pushed back in the direction opposite to the separated liquid outlet by the ring inclined surface 30 of 14. The thin lead screw 15 also pushes the solids back in the direction opposite to the separation liquid outlet. The separated liquid overflows from the separated liquid extraction orifice 13. By replacing the orifice 13, the solid content in the separated liquid can be adjusted to be as small as possible.

As described above, processing can be performed under optimal conditions depending on the properties of the processing liquid, and the solid content is transferred from the solid content discharge hole 18 to the solid content collection box 20, and the separated liquid is separated from the separated liquid extraction orifice 13. The liquid is discharged to the liquid collection box 21.

Further, since the screw conveyor blades 7 are curved, thermal expansion can be released even when processing high temperature liquid, and problems caused by thermal expansion can be avoided.

The centrifugal separator of the present invention having the above configuration improves the treatment of shochu manufacturing waste liquid, which had previously been insufficient and had become mushy due to solids remaining in the separated liquid, and the separated liquid contained almost no solids. It has become like that.

As mentioned above, the centrifugal separator of the present invention is suitable for processing waste liquids from food products that change depending on seasonal factors, etc., and especially for processing waste liquids from shochu production where the processing liquid is at a high temperature, but it is limited to these applications. It is clear that the method can be used not only for the purpose of treatment but also for a wide range of other waste liquid treatments.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional centrifuge, FIG. 2 is a sectional view showing a centrifugal separator according to the present invention, and FIG. 3 is a schematic exploded view of the outer cylinder of the centrifuge according to the present invention. , FIG. 4 is a drawing showing the swinging plate and lead screw in more detail, and FIG.
Figure 4b is a view of the swing-off plate and lead screw viewed from the center side in the direction of the rotation axis, Figure 4b is a view seen from the vertical direction of the rotation axis, and Figure 4c is a cross-sectional view of Figure 4b (lead screw). FIG. 4d is a sectional view of the circumferential ring of the swinging plate, and FIG. 4e is an enlarged sectional view of the arm portion of the swinging plate taken along the line A-A in FIG. 4a. In the figure, 1 is a bowl, 2 is a drive flange, 3 is a flange on the liquid inlet side, 4 is a hollow truncated cone on the solid content outlet side, 5 is a hollow truncated cone on the separated liquid outlet side, 6 is a screw conveyor shaft, and 7 is a screw conveyor shaft. Yukon conveyor blade, 8 bearing, 9 bowl drive pulley, 1
0 is a screw conveyor drive pulley, 11 is a liquid supply pipe, 12 is a solid content discharge header, 13 is a separated liquid extraction orifice, 14 is a swing plate, 15 is a lead screw, 16 is a liquid supply hole, and 17 is a liquid jet hole. , 18 is a solid content discharge hole, 19 is a cover, 20 is a solid content collection box, 21 is a separated liquid collection box, 22 is a screw conveyor, 23 is a solid content outlet side slope, 24 is a separated liquid outlet side slope Section, 27
28 is a hollow cylindrical member, 28 is an arm, 29 is a circumferential ring, and 30 is a ring slope.

Claims (1)

[Claims for Utility Model Registration] The invention has a bowl 1 and a screw conveyor 22 with blades, and these bowls and screw conveyors rotate at high speed with a certain rotational speed difference, and the processing liquid supplied inside the bowl is subjected to centrifugal force. The solid content is separated into a solid content and a separated liquid, and the solid content is scraped by the screw conveyor blade 7 and discharged from the solid content outlet 18 through the solid content outlet side inclined part 23 provided at one end of the bowl 1, and the separated liquid is A horizontal continuous centrifugal separator that discharges the separated liquid from the outlet at the other end of the bowl 1, wherein the inclined portion 23 is composed of a hollow conical truncated cone 4 that can be removed and replaced with respect to the bowl 1, and the separated liquid of the bowl 1 is discharged from the separated liquid outlet. Also on the outlet side, a separated liquid outlet side inclined part 24 is formed by a hollow conical truncated part 5 which can be removed and replaced with respect to the bowl 1, and inside the shaft 6 of the screw conveyor with blades passing through both of these inclined parts and the bowl, A blade 7 is provided in the portion inside the separated liquid outlet side inclined portion 24.
Instead, a swinging plate 14 is provided, and a lead screw 15 is installed in the gap between the swinging plate 14 and the hollow truncated cone 5, and the screw conveyor blades 7 are curved. The swinging plate 14 is composed of a plurality of arms 28 extending radially from a hollow cylindrical member 27 that can be fitted into a screw conveyor shaft, and a circumferential ring 29 connecting the ends of the arms. 1. A centrifugal separator having a substantially triangular cross section that becomes thicker toward the outlet side, and further characterized in that the swinging plate, lead screw, and screw conveyor are replaceable.