JPH0334281Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the improvement of a classifier, and particularly to a dry air flow fine powder classification device suitable for large-capacity classification under relatively low static pressure.

[Conventional technology]

BACKGROUND ART Conventionally, a cyclone classifier has been known that blows dust-containing gas into a conical cone to form a vortex and separates the contained particles by centrifugal force.

However, this type of cyclone classifier has problems such as being inconvenient to handle because it must be used under high pressure, and it is difficult to classify a large amount.

[Problem that the invention attempts to solve]

The present invention was developed in view of the above-mentioned problems, and it is an object of the present invention to provide a dry airflow fine powder classification device that can perform large-capacity classification under relatively low static pressure.

[Means for Solving the Problems] The dry airflow fine powder classification device according to the present invention sends a high-speed vortex of dust-containing gas from the large diameter side of a conical cone, and In an airflow fine particle classifier that has a coarse particle dust collection chamber and a fine particle dust collection chamber on the inner wall of the small diameter part and separates the particle size of captured dust by centrifugal force, a second dust-containing gas is preliminarily introduced into the front stage of the device. The gist is that a collision-type disperser is provided to divide the dust-containing fluid into collisions. and the ends of the two branch channels are linearly merged to form a dispersion pipe orthogonal from the merged position, and an air jet slit is opened toward the merged position in the same direction as the dispersion path, The gist of the present invention is to have a structure in which the dust-containing fluid that collides at the end of the branch channel is scattered in the direction of the dispersion tube while high-pressure air is ejected from the air ejection slit, thereby dispersing the inclusions.

[Operation] In the above configuration, the dust-containing gas is dispersed by the collision type disperser before being fed to the airflow fine powder classifier. divided and collided at both ends of the branch road,
The impact of the collision causes the contained dust and hair to be scattered and separated, and the high-pressure air jetted from the air jetting slit from the orthogonal direction is blown toward the dispersion tube. Therefore, since the dust and hair contained in the fluid are scattered and separated in a straight line by the collision of the dust-containing fluids, it works to increase the dispersion efficiency when fed to the subsequent air flow fine powder classifier, and improves the classification performance. can be improved.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the dry airflow fine powder classification apparatus according to the present invention will be described below with reference to the drawings.

The reference numeral 24 designates a collision type disperser constructed before the air flow fine powder classifier 25, and communicates with the input hopper 23. A flat rectangular housing 1 composed of a top plate 2, a bottom plate 3, side plates 4, 4, a front plate 5, and a rear plate 6.
A supply path 9 is constructed by using the end of a square pipe 7 protruding from the center of the front plate 5 as an inlet 8 for dust-containing fluid. Furthermore, the end of the square pipe 10 introduced into the housing 1 from the center of the bottom plate 3 is used as an air supply port 11 to constitute an air supply path 12, and the rectangular housing 1 partitioned by the square pipe 10. Divided channels 13, 13 are formed from the supply channel 9 evenly and symmetrically to the left and right by the inner cavity, and the ends of the branch channels 13, 13 are connected linearly between the square pipe 10 and the rear plate 6. The dispersion pipe 1 joins with the rear plate 6 and is perpendicular to the rear plate 6 from the joining position A.
4 to form a dispersion path 15. In addition, an air jet slit 16 is opened at the inner end of the square pipe 10 and has the same pipe direction as the dispersion path 15 toward the merging position A.
An airflow distribution mechanism 18 in which a plurality of airflow distribution fins 17, 17... are arranged in the longitudinal direction of the slit.
It consists of Reference numeral 19 denotes an airflow distribution mechanism constructed between the inner end of the square pipe 7 and the branch channels 13, 13, and is composed of L-shaped airflow distribution fins 20, 20, . . . that equally divide the flow channels. At the same time, airflow distribution mechanisms 22, 22, . . . each formed by L-shaped airflow distribution fins 21, 21, .

The airflow fine powder classifier 25 connected to the dispersion pipe 14 of the dispersion machine 24 has a coarse particle separation cylinder part 26 connected to the large diameter part of the separation cone 37 and a fine particle separation cylinder part connected to the small diameter part. 27, and a vortex generation chamber 29 connected to the supply pipe 28 connected to the dispersion tube 14 at the rear end of the coarse particle separation cylinder 26, and an exhaust port at the rear end of the fine particle separation cylinder 27. 30 openings. Further, reference numeral 31 is a coarse particle dust collection container connected to an opening on the circumferential surface of the coarse particle separating cylinder section 26 via a hopper 32, and reference numeral 33 is a coarse particle dust collecting container connected to an opening on the circumferential surface of the fine particle separating cylinder section 27. This is a fine dust collecting container that communicates via a hopper 34. Above hopper 3
2 and the vortex generation chamber 29, and the hopper 34 and the vortex generation chamber 29 are in return communication through communication pipes 35 and 36, respectively.

The dry air flow fine powder classification device having the above configuration is used to make the dust-containing gas into a state in which the contained substances are easily separated by the collision type disperser 24, and then to classify it using the air flow fine powder classifier 25. At 24, the air flow from the air jet slit 16 causes the branch passages 13,
13 and the supply channel 9 are under negative pressure, the dust-containing fluid passes through the supply channel 9 and enters the branch channels 13, 13 branched at right angles via the air flow distribution mechanisms 19, 19. Even during this passage, there are airflow distribution mechanisms 2 at the corners.
2, the dust-containing fluid causes the inclusions to become dispersed due to refraction impact. Furthermore, when opposing dust-containing fluids collide at high speed at the convergence position, fine particles or dust of different particle sizes entangled in the hair are separated, resulting in an excellent dispersion effect, and at the end of the dispersion tube 14. A dust-containing fluid is obtained in which the entanglements of the mixed dust are disentangled. Therefore, the dust-containing gas introduced into the airflow fine powder classifier 25 can be classified in a large capacity under relatively low static pressure.

[Effect of idea]

As described above, the dry air flow fine powder classification device according to the present invention has the feature of being able to perform large-capacity classification under relatively low static pressure, and the effects of the embodiments of the present invention are extremely large.

[Brief explanation of drawings]

Figure 1 is a front view showing an embodiment of the dry air flow fine powder classification device according to the present invention, Figure 2 is a side view of the same, and Figure 3 is a side view of the same.
The figure is a perspective view of the entire collision-type disperser, FIG. 4 is a plan sectional view thereof, and FIG. 5 is a partially cutaway side view. DESCRIPTION OF SYMBOLS 1... Rectangular housing, 8... Inlet, 9... Supply path, 11... Air supply port, 13... Branch flow path, 14
... Dispersion pipe, 15 ... Dispersion path, 16 ... Air jet slit, 17, 20, 21 ... Air flow distribution fin, 18, 19, 22 ... Air flow distribution mechanism, 23 ...
...Input hopper, 24...Collision type disperser, 25...
...Air flow fine powder classifier, 26...Coarse particle separation cylinder section, 27
...Fine particle separation cylinder section, 29... Vortex generation chamber, 30...
...Exhaust port, 31...Coarse dust collection container, 32, 34...
...Hopper, 33...Fine dust collection container, 35, 36
...Communication pipe, 37...Separated conical cone.

Claims (1)

[Scope of utility model registration request] A high-speed vortex of dust-containing gas is introduced from the large diameter side of the conical cone, and a coarse dust collection chamber and a fine dust collection chamber are established on the inner walls of the large diameter and small diameter parts of the conical cone, and centrifugation is performed. An air flow fine powder classifier that separates the particle size of captured dust by force, and a branch flow path is constructed by equally and symmetrically branching the ends of the supply path that is installed in the front stage of the air flow fine powder classifier and through which dust-containing fluid flows. and the ends of the two branch channels are linearly merged to form a dispersion pipe orthogonal from the merged position, and an air jet slit is opened toward the merged position in the same direction as the dispersion path, Collision in which the dust-containing gas is divided into two halves and collided in advance, with a structure in which the dust-containing fluid that collides at the end of the branch channel is scattered in the direction of the dispersion tube while high-pressure air is jetted from the air jet slit, thereby dispersing the inclusions. A dry airflow fine powder classification device characterized by comprising a mold disperser.