JPS581978B2 - Hydrocyclone type separator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid Zycron type separator for separating solid fine particles mixed in liquid C.

Bark and knot residue from solutions of pulp, papermaking raw materials, fibers, etc. As a device for separating and removing light solid particles such as pitch, bound fibers, and plastic particles, unbeaten and undissolved fibers, and sand grain scale, there is a device as shown in the vertical side view in Figure 1. Hydrocyclone type separator 1
There is.

The hydrocyclone type separator 1 shown in FIG. 1 has a liquid outlet at the center of the top of a main body 4, which has a right cylindrical part 2 in its upper half and a tapered pipe part 3 whose diameter becomes smaller as it goes downwards in its lower half. A cylindrical upstream riser pipe 6 serving as 5 is installed vertically, and a horizontal pipe 8 serving as an inflow path 7 for the liquid to be treated is placed at the top of the main body 4, allowing inflow from the tangential direction of the inner circumferential surface of the main body 4. It is installed so that

This hydrocyclone type separator 1 transfers the liquid to be treated through an inflow channel 7.
Press fit into the main body 4. Converts the liquid to be treated from a liquid with pressure energy to a liquid with velocity energy, and removes solid foreign matter mixed in the liquid. This is a device that performs centrifugal separation along the inner circumferential surface of the main body 4, and the separated solid fine particles are lowered along the inner circumferential wall surface of the main body 4 and collected from the lower end opening 9, and the liquid from which the solid foreign substances have been separated is It flows out through the upstream riser pipe 6.

The conventional hydrocyclone type separator 1 having such a structure presses the inflow of the liquid to be treated into the main body 4 through the horizontal pipe 8, and generates a horizontal swirling flow along the inner circumferential surface of the main body 4. , is a device that generates centrifugal force, but the continuously pressurized liquid to be treated directly collides with the preceding treatment liquid that is swirling horizontally, and when it enters the main body 4, the swirling It reduces energy.

For this reason, in this type of hydrocyclone separation device, the greater the inlet pressure is increased in an attempt to increase the ability to centrifugally separate solid fine particles, the greater the opposite force that reduces the swirling energy becomes. Therefore, it is difficult to increase centrifugation efficiency.

Based on the above-mentioned viewpoints, the present invention provides a hydrocyclone type separator that solves the problems of conventional hydrocyclone type separators and can greatly improve solid fine particle separation efficiency. A rising upstream pipe, which serves as an outflow path for the liquid after solid matter separation, runs vertically through the center of the top plate of the shaped main body, and is attached to the upper side wall of the main body. This is a hydrocyclone type separator having an inflow channel opened to allow the inflow of the liquid to be treated in the direction along the circumferential surface of the main body, and the inner surface of the top plate of the inflow channel is connected to the inner surface of the top plate of the main body. At the same time, the top plate of the main body surrounding the outside of the upstream riser has the same width as the outer peripheral surface of the cylindrical body, and is curved in a spiral shape that gradually descends from the apex at the position in contact with the inflow channel opening, and has a sloped lower end. The location. On the side of the inflow channel opening and approximately 2 times the height of the opening
In order to achieve this purpose, the top plate should be left in the position of 1/2, and the top plate can freely mix the swirling flow along the top plate into the lower part of the flow of the inflowing to-be-treated liquid passing through the inflow channel opening. There is.

Embodiments of the present invention are shown in the drawings (for detailed explanation, Fig. 2 is a vertical side view, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2, and Fig. 4 is an external perspective view of the main parts). As shown in , the hydrocyclone type separator 10 of the present invention has a cylindrical main body 11 as a combination of a cylindrical head 12 and a cylindrical body 13, and the cylindrical head 12 has a top plate 14. At the center position of
A cylindrical upstream riser pipe 16 that becomes an outflow path 15 for the liquid after solid matter separation is fixed vertically, and a rectangular tube body 19 that becomes an inflow path 18 for the liquid to be treated is connected to the side wall portion 17 to form an opening 20. has been formed.

The opening 20 of the inflow path 18 is opened so that the liquid to be treated can flow in from a tangential direction to the inner peripheral surface of the main body 11. The inner surface of the top plate portion 19a of the square tube body 19 is continuous with the inner surface of the top plate 14 of the main body 11.

The top plate 14 is spirally curved with a gentle slope so as to surround the outside of the upstream riser pipe 16 and gradually descend, with the apex at the position in contact with the opening 20 of the inflow passage 18. Slanted lower end 14a
of. The side wall portion 1 of the square tube body 19 faces the side of the opening 20.
9b is connected to a portion overhanging the head cylindrical body 12.

The position of the inclined lower end 14a of the top plate 14 is set at 1/2 of the inner height of the opening 20, and it is directed along the top plate 14 toward the downstream part of the inflowing liquid to be treated that is passing through the opening 20. It is located at a position where swirling flow can mix.

Since the present invention is constructed as described above, when the liquid to be treated that is press-injected into the inflow path 18 passes through the opening 20, the side wall portion of the head cylindrical body 12 forming the upper part of the main body 11
The flow becomes a swirling flow along the curved surface between the inner surface 17a of the top plate 14 and the top plate 14, and becomes a strong flow that gradually descends along the top plate 14, and as it moves nearly 360 degrees, it passes through the opening 20. The liquid to be treated collides violently with the lower part of the flow of the liquid to be treated, and at the opening 20, the liquid to be treated flowing into the main body 11 from the inlet passage 18 has already swirled through the longitudinal shearing of one-half the height of the opening 20. The descending vortex becomes turbulent due to the influence of the current.

For this reason, the liquid to be treated that enters the main body 11 and becomes a downward swirling flow due to the top plate 14 does not rapidly descend along the inner surface of the main body 11, and the time required for it to reach the lower part of the main body 11 is prolonged. It stays at the top for a long time. The number of turns per unit length of the main body 11 is increased. During this time, solid particles are carefully separated.

The swirling flow generated along the side wall of the main body 11 creates a vacuum in the center, and the liquid after separating the solid foreign matter rises to be sucked into the upstream riser pipe 16. Although it is similar to conventional hydrocyclone type separators of this type in that the particles are taken out to the outside, the device of the present invention greatly improves the separation effect of lightweight foreign matter, especially due to the action of swirling turbulence.

As is clear from the above description, the hydrocyclone type separator of the present invention has a top plate that is spirally inclined, and the sloped lower end of the top plate is connected to the inside of the opening in the main body wall of the inflow channel. By creating a top plate that faces approximately one-half of the height and has a step near the opening, it is possible to maintain the highest centrifugal separation effect for a longer period of time than before. , it has an excellent effect of ensuring solid separation.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an example of a conventional hydrocyclone type separator, Fig. 2 is a longitudinal sectional side view showing an embodiment of the hydrocyclone type separator of the present invention, and Fig. 3 is a vertical sectional view showing an example of a conventional hydrocyclone type separator. A horizontal sectional view of the line-view portion, and FIG. 4 is an external perspective view of the main part. 10...Hydrocyclone type separation device of the present invention,)
11... Main body, 12... Head cylindrical body.
13... Trunk cylindrical body, 14... Top plate,
14a... Slanted lower end, 15... Outflow path, 16... Upstream riser pipe, 17... Side wall portion, 18... Inflow path ．． 19... Square tube body, 19a... Top plate part, 19b... Side wall part, 20... Opening part.

Claims (1)

[Claims] 1 At the center of the top plate of the cylindrical body. An inflow path is opened in the upper side wall of the main body, which vertically pierces an upstream riser pipe that serves as an outflow path for the liquid after solid matter separation, and allows the liquid to be processed to flow in the direction along the circumferential surface of the main body; The inner surface of the top plate of this inflow passage is connected to the inner surface of the top plate of the main body, and the top plate of the main body surrounding the outside of the upstream riser pipe has the same width as the outer peripheral surface of the upstream riser pipe, and The slope is curved in a spiral shape that gradually descends from the apex at the position in contact with the channel opening, and the lower end of the slope is located on the side of the inflow channel opening and approximately half the height of the opening. A hydrocyclone type separation device featuring: