JPS6327798Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a vertical cyclone with low pressure loss and high collection efficiency in a cyclone separator. Conventional vertical cyclones use centrifugal force to separate and collect particulate matter in fluids, and are often used in preheating devices for cement raw materials, as shown in Figures 1 and 2.
The structure is as shown in FIGS. 3, 3, and 4. In what is shown in FIG. 1, a fluid introduction duct 1 is tangentially connected to a cyclone right cylinder 2, and a fluid discharge duct 3 is concentric with the right cylinder 2. Second
In the figure, a fluid introduction duct 1 is connected to a right cylinder 2 from the circumferential direction, and a fluid discharge duct 3 is concentric with the right cylinder 2. In the case shown in FIG. 3, the fluid introduction duct 3 is tangentially connected to the right cylinder 2, and the fluid discharge duct 3 is eccentric to the side opposite to the fluid introduction duct 1 with respect to the right cylinder 2. The one shown in FIG. 4 is the same as that shown in FIG. 1, but the part connecting the inner wall of the fluid introduction duct 1 and the peripheral wall of the right cylinder 2 is made to protrude toward the cyclone axis side by a curved guide 4. These figures 2 and 3
The cyclones shown in Figs. 2 and 4 are all aimed at reducing pressure loss, but the cyclones shown in Figs. 2 and 3 reduce pressure loss so little that no great effect could be expected. Further, although the cyclone shown in FIG. 4 can considerably reduce pressure loss, it has the drawback of decreasing collection efficiency. The reason for these is that in the cyclones shown in Figures 2 and 3, there is a large pressure drop due to the confluence of the fluid introduced from the introduction duct 1 and the swirling fluid in the cyclone, and the cyclone in Figure 4 is The curved guide 4 greatly reduces the pressure loss caused by the cyclone, but small powder particles that cannot be completely moved to the peripheral wall of the cyclone at the curved guide 4 are carried along with the discharge fluid and are discharged into the discharge duct 3. , and as a result, the collection efficiency is reduced. The present invention was made to improve the above-mentioned conventional drawbacks, and has a low pressure loss.
The purpose is to provide a cyclone with even higher collection efficiency. For this purpose, in the present invention, in a cyclone separator that separates and collects powder particles in a fluid and discharges the fluid, a partially cylindrical side wall with a diameter smaller than the inner diameter of the right cylinder is attached to the inner wall of the fluid introduction duct. The fluid discharge duct is connected adjacently and protrudes into the inside of the right cylinder at the same height, while the fluid discharge duct is cylindrically shaped and hangs down inside the right cylinder, and the cylinder is connected to the axis of the right cylinder. a cyclone separator provided eccentrically on the side opposite to the fluid introduction duct, and located away from the connection point of the partially cylindrical side wall to the inner wall of the fluid introduction duct and the cylindrical outer peripheral wall of the fluid discharge duct; And so. It is to be noted that it is more effective if the fluid discharge duct has a shape that combines cylinders with different diameters in which cylinders with two different radii touch at one point on the fluid introduction duct side. Next, the present invention will be explained in detail with reference to embodiments shown in the drawings. FIGS. 5 and 6 show one embodiment of the present invention. In this cyclone, a fluid introduction duct 1 is tangentially connected to a right cylindrical portion 2, a partially cylindrical side wall 5 having a smaller diameter than the inner diameter of the right cylinder 2 is connected adjacent to the inner wall of the fluid introduction duct 1, and the fluid The fluid discharge duct 3 is formed to protrude into the right cylinder 2 at the same height as the introduction duct 1.
It has a cylindrical shape with a diameter of about half of the diameter of
It is eccentric from the axis of the right cylinder 2 in an arbitrary direction (-50°<θ<50°) on the side opposite to the fluid introduction duct. The fluid discharge duct 3 hangs down inside the right cylinder 2 in a cylindrical shape, as shown by the broken line in FIG. Further, as shown in FIG. 5, the connection point A of the partially cylindrical side wall 5 to the inner wall of the fluid introduction duct 1 and the cylindrical outer peripheral surface of the fluid discharge duct 3 are located apart in a horizontal plane. . The optimum eccentric direction can be determined depending on the fluid velocity of the introduction duct 1. Further, the diameter of the partial cylindrical side wall 5 is also determined at an optimum diameter from the starting point A depending on the fluid velocity of the introduction duct 1. 7 is a space inside the cyclone formed between the right cylinder 2 and the hanging part of the fluid discharge duct 3 in the right cylinder 2, and 8 is a discharge part for the separated powder. Note that the partially cylindrical side wall 5 shown by the solid line in FIG. 5 can also be shaped as shown by the two-dot chain line in FIG. 7 and 8 show another embodiment of the present invention, this cyclone differing from the cyclone of FIG. 5 only in the fluid discharge duct section. In this, the fluid discharge duct 6 is a cylinder 6 with two different radii in plan view.
a and 6b are in the shape of a cylindrical connection type duct with different diameters in contact at one place on the fluid introduction duct 1 side, and the right cylindrical 2
Any direction on the anti-fluid introduction duct 1 side (-
It is eccentrically set to 50° < θ < 50°). The outer diameter of the cylinder 6a protruding above the right cylinder 2 is small, and the outer diameter of the cylinder 6b inside the right cylinder 2 is large.
a and 6b are integrally formed with each other in a smooth shape, and the fluid discharge duct 6 is formed into a boot shape. The eccentric direction and the diameter of the partial cylindrical side wall 5 are as described above.
Determination is made in the same manner as for the cyclone in Figure 5. In addition, this amount of eccentricity was set to about 5 to 10% of the diameter of the right cylinder 2, for example. The present invention is constructed as described above, and the space 7 in the cyclone formed between the right cylinder 2 and the hanging parts of the fluid discharge ducts 3 and 6 in the right cylinder 2 becomes gradually narrower. For this reason, the fluid containing powder and granules easily flows downward, and the powder and granules, which are heavier than the fluid made of air, are pushed toward the peripheral wall of the right cylinder 2 by the centrifugal force caused by swirling, and at the same time are forced to descend downward. The amount of powder flowing into the part of the partial cylindrical side wall 5 is reduced. As a result, the amount of powder accompanying the discharged fluid is reduced, and the collection efficiency of the cyclone is improved. In addition, the connection point A of the partial cylindrical side wall 5 to the inner wall of the fluid introduction duct 1 and the right cylinder 2 of the fluid discharge duct 3
Since it is located apart from the outer circumferential wall of the inner hanging part cylinder, the powder and granules that have swirled around the partially cylindrical side wall 5 will ride the introduction duct flow again and swirl.
Even light particles and fine particles are prevented from being transferred into and discharged into the fluid discharge duct 3, improving collection efficiency.
Furthermore, since the fluid is pushed downward as described above, the number of turns of the fluid is reduced, and the fluid friction that occurs when the fluid turns up after turning down is reduced, and the pressure loss is reduced. Also, the turning will be downward,
The partially cylindrical side wall 5 further alleviates the pressure loss caused by the convergence of the swirling flow and the introducing duct flow, and the resulting pressure loss is also reduced. On the other hand, by increasing the diameter of the fluid discharge duct 6, the swirling force of the fluid passing through this portion is weakened, and this also reduces pressure loss.

[Table] Table 1 compares the performance of the conventional cyclone shown in Figs. 1, 3, and 4 and the cyclone of the present invention shown in Fig. 5. Conventionally, collection efficiency and pressure loss were considered to have contradictory characteristics, but according to the cyclone of this invention, as can be seen from Table 1, it is possible to improve both collection efficiency and reduce pressure loss. Can be measured at the same time. As described above, since the present invention has the structure described in the claims for utility model registration, it is superior to conventional ones, and can simultaneously improve collection efficiency and reduce pressure loss. It can have a great effect.

[Brief explanation of the drawing]

Figures 1 to 4 are plan views illustrating conventional cyclones similar to the present invention, Figures 5 and 6 show one embodiment of the present invention, and Figure 5 is a plan view;
FIG. 6 is a left side view, and FIGS. 7 and 8 show other embodiments of the present invention. FIG. 7 is a plan view, and FIG. 8 is a left side view. 1...Fluid introduction duct, 2...Right cylinder, 3, 6
...Fluid discharge duct, 4...Curved guide, 5...
Partial cylinder side wall, 6a, 6b... cylinder, 7... narrow part, 8... powder discharge part.

Claims (1)

[Claims for Utility Model Registration] (1) In a cyclone separator that separates and collects particulate matter in a fluid and discharges the fluid, a partially cylindrical side wall with a diameter smaller than the inner diameter of a right cylinder is installed inside a fluid introduction duct. It is connected adjacent to the wall and protrudes into the inside of the right cylinder at the same height, while
The fluid discharge duct is cylindrical and hangs inside the right cylinder, and the cylinder is provided eccentrically to the side opposite to the fluid introduction duct from the axis of the right cylinder. A cyclone separator, characterized in that a connection point to an inner wall and an outer circumferential wall of the cylinder of the fluid discharge duct are located apart from each other. (2) Utility model registration claim 1, characterized in that the fluid discharge duct is a combination of cylinders with different diameters in which cylinders with two different radii touch at one point on the fluid introduction duct side. Cyclone separator as described in section.