JPS5823148B2 - Wind sorter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called vertical wind sorter equipped with a device for preventing objects to be sorted from accumulating on the bottom plate of a sorting tube.

A vertical wind sorter has several discharge pipes that point downward, and a sorting pipe that extends diagonally upward and continuously straddles these discharge pipes.

It has the function of sequentially sorting the objects to be sorted in order of bulk specific gravity using the airflow sucked in from below the first stage discharge pipe.

In this sorting machine, a conveying force is applied by air flow in the longitudinal direction of the sorting tube, which is installed at an angle.

Since the vertical component of the force of the airflow is reduced, objects with relatively large bulk specific gravity come into contact with the pipe wall.

Although they are in contact with each other, they shift or slide, and most of them are sent upwards, but some of them fall downwards.

However, the objects to be sorted include not only solid objects but also cloth-like, string-like, moisture-containing adhesion-resistant objects, and the like.

In order to prevent these objects from adhering to the tube wall, the inclination angle θ of the sorting tube must be quite large, and is usually set to 45 degrees or more.

For this reason, the height of the entire equipment increases, and the building that houses it increases.
The construction cost of the trestle increases and is extremely uneconomical.

Even if the inclination angle θ is large, if the adhesion-resistant object sticks to the wall surface, subsequent objects to be sorted will collide with this adhesion-resistant object and be prevented from moving upwards, so the objects to be sorted will accumulate one after another. Over time, this accumulation reduces the effective cross-sectional area of the sorting pipe diameter and increases the air resistance of the pipe line.

Not only will the sorting efficiency be reduced, but the tube will eventually become blocked.

Then, the inside of the pipe had to be cleaned, which was time-consuming and inconvenient.

The purpose of the present invention is to install a perforated bottom plate inside the sorting pipe and blow out an air flow from the perforated bottom plate to prevent objects from coming into contact with the pipe wall, to separate the objects from the pipe wall and to make them float. An object of the present invention is to provide a wind sorter that prevents the accumulation of materials to be sorted.

The drawings showing the embodiments will be explained below.

FIG. 1 is a longitudinal cross-sectional side view of a wind sorter according to an embodiment of the present invention.

The discharge pipes 3a, 3b, 3c, which are erected substantially downward, are connected to the sorting pipes 2a, 2b, which are inclined diagonally upward and span over these pipes.
, 2c.

Connection points 1b and 1c are branched, and 1 at the sorting point.
There is also.

The diameter of the sorting tube becomes thicker in the later stage. This is because it is necessary to sequentially select objects with low bulk specific gravity, so the flow velocity of the airflow is reduced.

13 is a chute for charging the material to be sorted X, and is connected to the supply device 5.

The material to be sorted
The liquid is then sent to the supply port 1a provided in the middle of the first stage discharge pipe 3a.

4 is an air supply port for sucking in high-speed airflow. 10 is a gas/solid separation device such as a cyclone, which is connected to the final stage sorting tube.

11 is a discharge device attached to the lower end of the separation device.

Reference numeral 12 denotes an air flow generator interposed in the exhaust air path.

The above configuration is the same as that of a conventional wind sorter.

In addition to these, the sorting machine of the present invention has the following configuration.

9a, 9b, and 9c are sorting tubes 2a and 2b, respectively.

This is a perforated bottom plate laid inside the bottom plate 2c, and a large number of air holes 15 are bored through it.

Reference numerals 78 to 7c are air supply pipes for blowing air from the bottom of each sorting tube.

19 is an air flow generator, and each air flow pipe 21a~
21c and air volume adjusting devices 8a to 8c, high-speed airflow is supplied to the air supply pipes 7a to 7c.

The operation of the above configuration will be explained.

From the supply chute 13, the input material to be sorted or an appropriate amount is fed by the feeder 5 to the branch sorting point 1a via the chute 14.

Here, the first sorting is performed by the high-speed airflow sucked in from below the discharge pipe 3a.

That is, the material to be sorted A having the largest bulk specific gravity falls below the discharge pipe 3a, and the remaining materials are blown up toward the sorting pipe 2a.

Next, at the second branch point 1b, the wind speed decreases, so that the objects B to be sorted, which have lost their buoyancy and have a relatively large bulk and specific gravity, fall through the discharge pipe 3b and are separated.

The remaining objects to be sorted ascend the sorting tube 2b while being subjected to a weaker buoyancy force, and are sorted each time they reach the third branch point 1c.

Materials with relatively large bulk specific gravity rise to the discharge pipe 3c, and a gas mixture with light suspended matter rises to the sorting pipe 2c.

The mixed gas exiting the sorting tube 2c is separated into solids and gas E by the gas/solid separator 10.

Conventional sorting tubes have had problems as shown in FIG.

That is, most of the objects to be sorted i go through the path to J+ and rise like p.

This is because these objects have been blown up through vertical pipes, so their bulk specific gravity is sufficiently low that the effect of updrafts is superior to gravity, and this relationship does not change even in a sorting pipe with an inclination. It is.

Inside the sorting tube, there is a gravitational acceleration component perpendicular to the tube wall 2', so many of the objects to be sorted (with relatively large bulk specific gravity) move upward through the sorting tube while sliding or rolling on the tube wall 2'. We will continue to do so.

In a sorting tube, the acceleration that an object receives in the direction along the tube is greater than in a vertical tube, so for a normal object,
This movement is performed smoothly.

However, objects containing moisture or flat objects W with low air resistance have a strong adhesive force with the pipe wall 2', so they are no longer carried up by the wind force and are attached to the pipe wall 2'. be.

If such a deposit W exists, the object becomes i - a - j
- + k, collides with this object W and loses speed,
It falls down the tube wall as l-=m-n, is blown up again, and circulates inside the sorting tube 2.

In such a case, objects stop and accumulate on the tube wall 2' one after another, which not only impedes the sorting effect but also blocks the tube.

FIG. 2 is an enlarged view of the sorting tube section 2 of FIG. 1.

A porous bottom plate 9 is laid above the lower pipe wall, and the material to be sorted t is carried upward without adhering to the bottom plate 9 because of the air blown up through the air holes 15 from the air supply pipe 7 below.

In addition, the object S to be sorted that fell and collided with the bottom plate 9 and lost momentum.
It also peels off due to the air force blown up from the bottom plate 9, and even if it slides down a little, it will eventually slide upward.

The porous bottom plate 9, the air supply pipe 7, and the air volume adjustment device 8 may be provided in all the sorting pipes 2a, 2b, and 2c, or only in some of them.

Furthermore, since the particle size of the material to be sorted and the wind force in each of the sorting tubes 2a, 2b, and 2c are gradually decreasing, it is desirable to change the air pressure when blowing out from the air supply tube 7 and the diameter of the air hole 15.

Furthermore, it is desirable to change the diameter and distribution of the air holes 15 even within the same bottom plate 9 so that the air pressure does not become too high only in the central portion of the bottom plate 9 where the air supply pipe 7 is provided.

As detailed above, according to the present invention, it is possible to prevent the materials to be sorted from accumulating on the wall of the sorting tube 2, so complicated cleaning is not required and the angle of inclination of the sorting tube 2 is reduced. It is also possible to save on construction costs for a building to house the sorting machine.

Its practical effect is remarkable.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view of a wind-powered sorter according to an embodiment of the present invention, FIG. 2 is an enlarged side sectional view of the sorting pipe portion thereof, and FIG. 3 is an enlarged side sectional view of the sorting tube portion of a conventional sorter. It is. 1a to 1c are branch points, 2a to 2c are sorting tubes, 3a to 3c
is a discharge pipe, 4 is an air supply port, 5 is a supply device, 5b and 5c are discharge devices, 7a and 7c are air supply pipes, 8a to 8c are air volume adjustment devices, 9a to 9c are porous bottom plates, 10 is gas/solid separation device, 11 is a discharge device, 12 is an air flow generator, 13.14
is a chute, 15 is an air hole, 19 is an air flow generator, 2
1 is air flow piping.

Claims (1)

[Claims] l A sorting tube that is installed obliquely upward and has a cross-sectional shape that gradually increases from the bottom, an appropriate number of generally downward discharge tubes arranged at appropriate positions on the sorting tube, and a gas connected to the uppermost end of the sorting tube.・In a wind sorter that consists of a solid separation device, a supply device that feeds the material to be sorted to the sorting tube, and an air flow generator that generates an air flow from the bottom to the top of the sorting tube, porous holes are installed in the sorting tube. A wind sorting machine characterized by installing a bottom plate and blowing out air from a number of air holes bored in the bottom plate.