JPS63500439A - Equipment for sizing particles between 20 and 300 microns - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Apparatus for sizing particles between 20 and 300 μO and carrier media circulation system to size particles between 2o and 300 microns. Relating to a device for

Materials containing particles of various sizes (such as pigments, fillers and abrasives) are used in industry. separation into two phases is often required. That is, one phase is It primarily contains relatively small particles, and the other phases mainly depend on the size of the particular particles. They are often separated to contain larger particles.

Various particle sizers and/or dust fractions are known for particle separation. . Examples are cyclones, centrifuges, hydraulic classifiers and sieves; The use depends on the material to be sorted, the accuracy of the sorting and the technique specified.

For particle size ranges of 20-300μ, air jet sieving is generally preferred. However, it is used unless extremely high processing capacity is required. air jet sieve The main part is a sieve drum that rotates along an inclined axis in the housing. Grain sizing The required fraction of the material to be processed is blown in the radial direction of the sieve drum using a It is pumped through by the carrier medium at a rate of approximately 10-20 kp/h.

The disadvantage of this device is that most of the surface of the rotating sieve is covered by the material to be separated. therefore, compared to the size of the device, the functioning sieve surface is relatively small. It's a small thing. The material sits on the sieve, the particles fill the gaps, and the viscosity Particles that stick to the surface further reduce efficiency.

On the other hand, because of the moving parts, the device is prone to failure.

The object of the present invention is to provide a device for reliably sizing particles between 20 and 300μ with high output. The goal is to provide the following.

According to the invention, the housing of the device is vertically arranged and centered by the bulkhead. and an outer part, the sieve element forming at least a part of the It is supposed to be done. The sieve element is 20° to the direction of particle flow. It is placed at an angle. Tilt outward from the center of the housing at a 30-45° angle. A slanted baffle board is placed in the center, and an overflow weir and carrier are installed on the outside. Adjacent collection channels connected to the media circulation system are provided. should be separated A common inlet for raw material and carrier medium as well as an outlet for coarse particles is located in the center of the housing. while the fine particle outlet is connected to the outer part.

The carrier medium circulation system may be closed or open and may be operated by gaseous or liquid media. It can function as well. Therefore, the fan or pump and fine sludge or dust separators are in the system.

The sieve elements are replaceable and/or adjustable.

The housing preferably has a flexible suspension and is designed to improve separation efficiency. It has a second drive device. The drive may be an eccentric plate connected to an electric motor.

Similarly, the separation efficiency is improved if the carrier medium system is equipped with pulsation U. can be

In the device according to the invention, a portion of the coarse fraction is transported by gravity in front of the sieve surface. and the other part can be mechanically separated on a sieve. Furu The m-grain fraction flowing past the surface of the fin exits through the granule outlet.

Placing the sieve surface in a vertical or inwardly inclined position will prevent the material from passing through the sieve. This prevents the sieve from settling on the top, thereby leaving the sieve surface clean and unobstructed. It operates at higher power than devices known in the art.

The main advantage of the above device is that it has a power output of 1O-20kp/h, as opposed to the traditional [2] output is 2-10c+/h (output of known device is 1O-20kp/h) and functions with high efficiency.

The efficiency of the device can be further improved by a vibratory or agitating action. So This means that the flow of the medium on the sieve is constantly directed outwards and is smaller than the pores of the sieve. This is because small particles can easily pass through the sieve. However, it is slightly smaller than the hole in the sieve. Larger particles tend to stick to the apertures, so they must be constantly removed. No. When vibration is applied, some particles fall, but many more stick. Particle removal requires periodic removal of the intrusion effect of the media flow. This is a net This is achieved by adjusting the horizontal movement of the batten so that it is faster than the velocity of the media flow. will be accomplished. Then, the moment when the sieve moves outward faster than the media flow occurs at each moment of movement. Become always on stage. As a result, the particles are unable to leave the mesh plate. Wear. Separation can also be achieved by pulsating the media flow, but This is relatively ineffective and technically more complex.

Another advantage of the device is that it can be operated with liquid as well as gaseous carrier media. and that the sieves can be replaced depending on material quality and particle size. Furu Replacement or adjustment of its position can be carried out quickly and easily.

Since there are no moving parts within the particle sizing space of this device, its operation is reliable and maintainable. Servicing is quite simple.

Further details of the invention are explained by way of example in the drawings. In that drawing There, FIG. 1 is a sectional view of a device according to the invention.

FIG. 2 is the device shown in FIG. 1 functioning with a liquid carrier medium.

FIG. 3 shows the apparatus shown in FIG. 1 operating with a gaseous carrier medium. be.

The device shown in FIG. It is divided into 3 parts. The partition wall 4 of the central part 2 is formed by a sieve element 5; A baffle plate 6 is then arranged in the central part 2 at the level of the sieve element 5.

The baffle plate 6 is inclined outward from the center line of the inner space 2 to sieve the material to be separated. Lead to the top of the new element 5. The inclination angle of the baffle plate 6 is 30-45°.

In this example, the baffle plate 6 has a truncated conical surface and has a central opening 6a.

The cross section of the opening becomes smaller at each level going down. the bottom The baffle plate may have no holes at all. The half-cone angle (i.e., the inclination) of the baffle plate The oblique angle) is 40'' with respect to the vertical centerline.

Of course, other shapes of baffles can also be applied. They are truncated pyramids. It may be in the shape of a do, or it may be an equally simple plate.

The sieve element 5 is likewise provided with a slightly inclined position and, inter alia, with a drive. If not, it may be at an angle of up to 20" to the vertical. However, In this embodiment, the sieve elements 5 are vertical.

The distance of the baffle plate from the pane is adjustable.

A material charging hopper 7 is connected at its top to the central part 2 of the housing and is The material to be separated is passed through it into the device. Carrier Media Population Stub 8 is also centrally located and has a charging cone 9 thereon for setting the amount of material to be charged. have below.

The coarse outlet stub 10 is connected to the interior space 2, and the fine outlet stub is connected to the housing. It is connected to the outer space 3 of the group 1. Both stubs are provided with butterfly valves 12 and 13. e.g. containers (with or without elevator) or spaces. Connected to a confined space, such as a delivery device with a loose valve.

The housing 1 has at its top an overflow stream 14 connected to an inclined collection channel 15. Well equipped. An exit stub 16 is made at its deepest point.

During the operation of the device, the material to be separated enters the material charging hopper 7, where it is The material is then transferred to the charging cone 9 by the carrier medium flowing through the artificial stub 8. I'm being dragged into a world where I'm being bullied. The material is thus in the central part 2 of the housing 1. and pass towards baffle board 6.

From there, it flows directly to sieving element 5 where relatively large particles are Due to the force, it falls apart between the baffle plate 6 and the sieve element 50. Other large Large particles caught on the sieve element 5 fall to the bottom of the center 2, From there it exits through the coarse outlet stub 10.

The fines fraction flows together with the carrier medium through the pores of the sieve element 5 and collects the fines. It exits through the exit stub 11.

The carrier medium passes through the overflow weir 15 together with the finest fraction and then falls and is collected. It exits from channel 15 through outlet stub 16 .

Sorting efficiency can be improved by vibrating or rocking the sieve. I mentioned it earlier If the sieve mantle is in motion, particles will be shaken out of the mantle. Therefore, the free sieve surface becomes larger. For this purpose, housing 1 It may also be connected to a drive mechanism. This is provided with an eccentric disk in this embodiment. It is an electric rock 17 and is connected to the housing 1 through an eccentric disk. housing The movement of 1 is made possible by a flexible suspension 19.

As mentioned above, the device according to the invention can be used in the same manner with liquid and gaseous carrier media. etc. functions. A system functioning with a liquid carrier medium is shown in Figure 2. Ru.

As can be seen in the drawings, a closed carrier medium circulation system 20 is connected to the collection channel 15. It is connected to the outlet stub 16. Here, the flow of the liquid is ensured by the pump 21. It will be done.

Due to the very fine separation of the two components present in the carrier medium being discharged, the carrier Media circulation system 20 includes a fine sludge separator 22 . purified from here The carrier medium returned to the carrier medium population stub 8.

Both parts discharged from the device are carried away by closed elevators 23 and 24.

A variant of the device according to the invention, which operates with a gaseous carrier medium, is shown in FIG. has been done. Here, the carrier medium is not returned to the inlet stub 8 but is purified. It is then released into the surrounding air. This system is driven by a fan 25, The fine fraction in the medium is removed by cyclones 26 and 27.

It is clear that the separation of the media containing the particles is carried out very efficiently and reliably. that much Since there are no moving parts within the split system, wear and tear is therefore minimal and the system is easy to maintain. No preparation required.

The sieve is replaceable and its position adjustable.

The device functions equally well with liquid and gaseous carrier media and therefore can be used in a wide range.

Naturally, the examples serve only as an illustrative illustration of the device according to the invention. However, other variations are possible within the scope of the claims in this application. It is clear that he is capable of this.

Fig, 1 international search report

Claims (1)

[Claims] 1. 20 and 300 miku consisting of housing, sieve and carrier medium circulation system The device is for sizing particles between particles, and the housing (1) is arranged vertically. divided into a central part (2) and an outer part (3) by a partition wall (4), and a sieve An element (5) forms at least a part of said partition wall (4) and directs the flow of particles. They are arranged at an angle of up to 20° with respect to the located within the center (2) of the housing (1) and 3.3 mm from the center of the housing (1). Slanted outward at an angle of 0-45°, the outer part (3) of the housing (1) Collection channel connected to flow weir (14) and carrier medium circulation system (20) (15), and the particles to be separated and the carrier medium in the device. A common inlet of the body and an outlet of the coarse particles abut the central part (2) of the housing (1). connected to the outer part (3) of the housing (1), while the fine particle outlet is connected to the outer part (3) of the housing (1). The above-mentioned particle sizer. 2. The opening in the center of the jiyama board or the cross section between the jiyama boards (6) decreases with each height. 2. Device according to claim 1, characterized in that: 3. Claims characterized in that the carrier medium circulation system (20) is a closed system. Apparatus according to paragraph 1. 4. Claims characterized in that the carrier medium circulation system (20) is an open system. Apparatus according to paragraph 1. 5. The carrier medium circulation system (20) is equipped with a fan (21) or a pump (25). Any one of claims 2 to 4, characterized in that The device described in. 6. The carrier medium circulation system (20) contains at least one fine sludge or dust. Claims characterized in that it is equipped with a separator (22, 26, 27) The device according to any one of items 1 to 5. 7. The sieve element (5) is replaceable and/or adjustable The device according to any one of claims 1 to 6, characterized in that: Place. 8. The housing (1) has a flexible suspension (19) and is equipped with a drive device. Any one of claims 1 to 6, characterized in that: Equipment described in Section. 9. The drive device is characterized by comprising an electric motor (17) and an eccentric disk (18). 9. The apparatus according to claim 8. 10. characterized in that the carrier medium circulation system (20) is equipped with a pulsator , the apparatus according to any one of claims 1 to 9.