JP2759843B2 - Crushing fluid dryer installed in crushing fluidizing dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a crushing fluidized-drying apparatus for crushing industrial waste containing water, contacting it with hot air at a second speed, and then collecting the dried powder. And a crushing fluidized dryer disposed in

[Conventional technology]

A crushing fluidized dryer arranged in a conventional crushing fluidized drying device is:
As shown in the patent publication of Patent No. 1290498, etc., a duct leading to the powder recovery device is arranged on the ceiling, and industrial waste mainly containing water is directly below the tower body (hereinafter simply referred to as raw material). ) And a hot-air blowing port, and two rotating impellers rotating in opposite directions to each other at the bottom.

In the pulverization of the raw material by operating the crushing fluidized dryer, the raw material is continuously dropped from a charging port onto a rotary impeller, and crushed into small chunks while blowing hot air against the raw material. This small lump is thrown above the crushing fluidizer by the rotating force of the rotating blades of the rotating impeller. These are re-crushed by the impact force of collision with each other. Then, it is re-crushed to make the particle size smaller, the moisture contained therein is evaporated, and the particles are put on a flowing air stream for drying and then raised.
However, the coarse undried powder that cannot be carried by the flowing airflow is further dropped on the rotary impeller. Repeat this work, finally
The powder is crushed into a powder that can float in the crushing fluidized dryer on the ascending air current generated by the hot air blown into the crushing fluidized dryer. This powder is said to be collected in a collection device through a duct.

Therefore, in the crushing fluidized dryer arranged in the conventional apparatus, two rotating impellers are required, and for pulverizing the raw material, the raw material is crushed by the rotating impeller, the crushed mass is released, and the crushed mass is collided with each other. It is obtained by repeatedly doing the thing, there is also a lot of mutual interference loss by rotating the two impellers, the residual portion of the coarse powder that can not rise stays under the rotating impeller, The power by the increase of the load became large, and the powdering of the raw material could not be said to be highly efficient.

In addition, debris that has been repelled to the side of the rotary impeller hits the bearing side, damages the bearing side, and is sometimes blown out from the bearing through hole.

[Problems to be solved by the invention]

In view of the above-mentioned circumstances, the present invention is a fluid crushing method in which the rotary impeller is driven uniaxially, and the input of the raw material and the blowing of hot air are particularly devised, the rotational power of the rotary impeller is reduced, and the raw material can be efficiently crushed. It is an object of the present invention to provide a fluidized crushing dryer disposed in a drying device.

[Means for solving the problem]

A duct leading to the pulverized fine powder recovery device is arranged on the ceiling,
An inlet and a hot air inlet for raw materials etc. are arranged below, and a rotary impeller for crushing raw materials etc. is arranged at the bottom. In the machine, the bottom of the crushing fluidized dryer is formed as a sliding crushing part of an arc-shaped recess slightly larger than the diameter of the rotary impeller and shallower than the radius thereof, and the sliding crushing part includes: A center plate is provided at the center of the rotating shaft, and crushing blades are radially mounted on both sides of the center plate via bosses penetrating the rotating shaft,
Rotating blades provided with suction blades are rotatably arranged on both outer sides of the crushing blades, and a chute from the input port to the sliding crushing section is a chute in which raw materials and the like fall down in a sliding state toward the rotating blades,
On the side opposite to the lower end of the chute, hot air blowing ports are provided in multiple stages above and above the sliding crushing section.

(Operation)

Since the present invention is configured as described above, the raw material continuously input from the input port and sliding down the chute falls on the rotary impeller rotating at the sliding crushing section into which the hot air is blown, and this is the rotation of the rotary impeller. Crushed into small chunks by rotational force,
The crushed small lump is thrown toward the chute by the action of the centrifugal force of the rotating impeller.

The thrown small chunks are continuously thrown into the chute, and efficiently strike the churning material to break down the thrown chunks into small chunks. Crushed into chunks. This small lump falls on the rotating impeller rotating at the sliding crushing section by its own weight. In the repetition process of this operation, the crushed lump is drawn into the inside of the rotary impeller, and further the above operation is repeated to be finally crushed to dry powder, and by repeating this, floated in the fluidized crush dryer. It can be a dry powder that has been crushed to a degree.

In addition, since the rotary impeller of the present invention particularly functions to draw the crushed pieces into the rotary impeller, the crushed pieces are struck toward the bearing side of the rotary impeller and crushed as in a conventional machine of this type. It does not damage the bearing side of the dryer.

〔Example〕

Hereinafter, a drawing showing a configuration of the present invention as an embodiment will be described.

FIG. 1 is a cross-sectional view of a crushing fluidized-bed dryer of the present invention formed in a vertical tower and disposed in a crushing fluidized-bed drying apparatus. This crushed fluidized dryer is incorporated in a part of the crushed fluidized dryer, and at least a raw material supply device, a hot air supply device, and a powder crushed by a crushed fluidized dryer are provided outside the crushed fluidized dryer. , A rotary impeller driving device and the like (both are not shown).

In the figure, reference numeral 1 denotes a vertical crushing fluidized dryer. The bottom of the crushing fluidized dryer 1 is formed as a sliding crushing section 2. The sliding crushing portion 2 is formed as a trough-shaped recess having an arc-shaped cross section, which is slightly wider than the diameter of the rotating impeller described later and has a depth slightly smaller than the radius of the rotating impeller. A rotating impeller, which will be described later, is rotatably arranged in the recess by receiving power transmission from a rotating impeller driving device (not shown).

The rotating impeller 4 is, as shown in FIGS. 2 and 3,
Center blades 8, 8 are fixed to the rotating shaft 7 back to back. Bosses 9, 9 penetrating the rotary shaft 7 are concentrically mounted on the center plates 8, 8,
As shown in FIG. 2, crushing roofs 10, 10 are fixed to the bosses 9, 9 and the center plates 8, 8, respectively. Further, suction blades 11, 1 forcibly generating an axial flow, which is a drawn air flow in the direction of the center plates 8, 8, are provided outside the rotary shaft 7.
Fix 1 The rotating shaft 7 of the rotary impeller 4 configured as described above is rotatably supported by a bearing (not shown) disposed on a side wall of the sliding crushing unit 2 provided on the outside of the bottom of the crushing fluid dryer 1. . The direction of rotation of the rotary impeller 4 is set counterclockwise toward the chute 14 provided in the crushing fluidized dryer 1 as shown in FIG. By this setting, A which is the hot air blowing port side toward the sliding crushing section 2 in FIG.
The portion is on the suction side of the hot air blown from the hot air blowing port, and the portion B on the chute portion 14 forming side is a crushing fluidized dryer 1 from the input port of the raw material etc. which slides down from the chute portion 14 and falls.
The raw materials and the like 5 charged into the inside are bombarded against the rotation of the rotary impeller 4, and are efficiently crushed into a lump, which is on the throwing side of the crushed lump. On the suction side A of the sliding crushing section 2, the sliding crushing section 2 and hot air blowing ports 12a, 12b, 12c for drying the raw material are provided in multiple stages above the sliding crushing section 2. Dampers 13a, 13b, 13c for controlling the amount of hot air blown into the fluidized dryer 1 are provided at each of the hot air blowing ports 12a, 12b, 12c. The control of each of the dampers 13a, 13b, 13c is not shown, but, for example, in order to crush the raw material or the like to be charged, by detecting the rotation speed of the rotary impeller 4 that changes according to the load applied to the rotary impeller. Can be controlled. A chute portion 14 that forms a steep slope from the input port 15 of the raw material 5 is formed to extend toward the release side B portion of the sliding crushing portion 2. A screw-type conveyor 17 that continuously feeds the raw materials 5 into the fluidized crusher / dryer 1 is connected to the raw material input port 15.

In order to pulverize the raw materials and the like 5 into a powder while drying the raw materials 5 using the crushing fluidized dryer 1 having the above-described configuration, first, a raw material supply device, a hot air supply device, a rotary impeller driving device, and a crushed fluidized dryer are used. A device (not shown) for collecting the pulverized dry powder is operated to feed the pretreated raw material 5 through the inlet 17 through the conveyor 17 into the chute section 14 in the crushing fluidized dryer 1.
The raw materials and the like 5 which have been dropped and thrown down slide down the chute portion 14 and rotate the impeller 4 already rotating at the sliding crushing portion 2.
Drop supply toward the throwing side of. Since this supply is against the rotation of the crushing blades 10 of the rotary impeller 4, the crushing efficiency of the input material 5 and the like is improved. On the other hand, hot air necessary for drying the raw material 5 is blown into the rotary impeller 4 provided in the sliding crushing section 2 through the hot air blowing port 12a provided in the lowermost stage. Therefore, an updraft is generated in the crushing fluidized dryer. In such a state, the raw materials 5 dropped on the rotary impeller 4
Against the crushing blades against the counterclockwise rotation of the crushing blades, and is divided into blocks by the impact. This lump is thrown toward the chute by the centrifugal force generated by the rotation of the rotary impeller. In addition, the thrown mass hits the input raw material 5 and crushes the input raw material 5 by the impact of the collision, and crushes the thrown mass. Then, the crushed lump falls onto the rotary impeller 4 by its own weight. This is repeated and broken into small pieces, and further broken into smaller pieces. The debris released upward in the medium crushing fluidized dryer is dropped by its own weight around the rotary impeller, and is generated by the hot air blowing from the hot air blowing port from the part A side and by the rotation of the suction blade from the Yokogawa. The air flowing toward the center plate side of the rotating impeller is sucked into the inside of the rotating impeller, and is stopped at the center plate 8.
Is thrown into the sliding crushing unit from the periphery of the crushing unit, and by this repetition, the powder is slid and crushed in the sliding crushing unit 2 into powder. Repeatedly being thrown. By this repetition, hot blast is applied to the sliding crushing section 2 to perform sliding crushing while evaporating and subdividing water.

By repeating the sliding crushing and the collision crushing, the powder is finally crushed into fine powder and simultaneously dried. In this process, the fine powder is blown upward of the fluidized dryer 1 by the hot air blown into the sliding crushing section and the rising airflow generated by the rotating impeller rotating in the sliding crushing section. Of the fine powder blown up, the fine powder that has become finer in the rising airflow floats in the fluid crushing dryer, and the finer powder that has not been finer in the rising airflow resists the rising airflow. do it,
It falls on the sliding crushing part, and is further crushed finely by the rotary impeller arranged in the sliding crushing part, and is finally made finer as it rides on the rising airflow.

The fine powder crushed to such an extent that it floats in the fluidized crusher and dryer is operated by the fine powder recovery device and collected from the ceiling of the fluidized crusher and dryer through the duct to the fine powder recovery device.

As shown in FIG. 1, the hot air blowing port may be provided not only at the position opposite to the lower end of the chute of the fluidized crusher / dryer but also at the upper portion thereof in a stepped manner.

That is, the hot air outlet dampers 13b, 13c at the upper part of the hot air inlet provided at a position opposite to the lower end of the chute.
To close the hot air blowout, or open it slightly to blow out a small amount, and open the damper 13a of the hot air blowout port toward the sliding crushing part fully to increase the amount of hot air blowout from the blowout port. A strong ascending air current is generated in the fluidized crushing dryer from the sliding crushing section, and even if the raw materials, etc. crushed in the sliding crushing section are relatively heavy, they must float in the fluidized crushing dryer on the rising airflow. become.

Therefore, in order to crush raw materials and the like into fine particles, reduce the amount of hot air supplied from the damper 13a to the sliding crushing section,
Sliding crushing is repeated by generating a weak ascending airflow, slightly opening the dambar 13a, blowing a small amount of powder, and dropping the crushed powder on the sliding crushing section on any side.

At this time, at the same time as adjusting the air flow from the hot air blowing port to the sliding crushing section, the excess air flow is adjusted by adjusting the open state of the dambars 13b, 13c of the upper blowing port to blow out hot air corresponding thereto. By this operation, the particle size of the fine particles can be adjusted.

On the other hand, in the conventional fluid crushing and drying machine, crushed lump of raw material and the like crushed by the rotating impeller, crushed side, stones and metal pieces mixed therein are spilled to the end of the rotating blade vehicle by rotation of the rotating impeller. However, there is a disadvantage that the receiving shaft disposed side of the rotary impeller and its surroundings are damaged. The rotating impeller of the present invention has solved this disadvantage. That is, the sliding crushing section 2
The suction impeller is attached to both ends of the rotary impeller 4 arranged at the both ends of the rotary impeller, so that an air flow is always drawn toward the center plate of the rotary impeller during the pulverization of the raw material and the like.
The fragments crushed by the rotary impeller 4 by 11 and 11 are drawn in the direction of the center plates 8 and 8, and the crushed fragments are flow-dried by the air current facing the end face side of the rotary impeller 4 and the end face side. The crushed pieces, crushed powder, stones, metal pieces, and the like mixed in the raw material are not thrown between or near the bearing mounting wall of the rotary impeller of the sliding crushing section of the machine 1 and are moved toward the center plate. Is forcibly sucked, is thrown upward by the center plate, and is blown up above the fluidized-drying tower 1 by an ascending airflow.

〔The invention's effect〕

As described above, according to the present invention, a fluidized crushing and drying machine in which an input material such as a raw material, which has been introduced from an input port, slides down a chute and blows an appropriate amount of hot air into the fluidized crushing and drying machine. Is thrown toward the rotary impeller disposed in the sliding crushing section of the above, and is crushed by the rotary impeller. Then, the crushed mass is thrown toward the chute by the centrifugal force of the rotating impeller, and this crushes the raw material and the like which is continuously charged, and crushes this, and the crushed pieces are suction blades arranged on the rotating impeller. car
It is drawn into the sliding crushing section by the drawn airflow generated by the rotation of 11, 11 and is further finely crushed and thrown in the chute direction by the rotation of the rotary impeller, and this is repeated, so that the input material etc. The milling process can be slid and milled as an effectively dried fine powder of the desired degree.

Furthermore, the configuration of the fluidized-crusher / dryer is as described in the text, but conventionally two rotary impellers were required. However, in the present invention, only one rotary impeller is arranged. As a result, the driving means of the rotary impeller can be simplified, and the setting space for the driving means can be reduced. can do.

Further, according to the present invention, by providing suction blades for generating a drawn airflow toward the center of the rotary impeller on both sides of the rotary impeller, the wall surface of the fluidized drying tower facing the end face side of the rotary impeller In addition to preventing and accumulating fine powder in the vicinity thereof, leakage of fine powder from the bearing part of the rotary impeller to the outside, and occurrence of clogging of the bearing part, etc., as well as hot air blowing ports Are provided in a multi-stage manner, so that there are many advantages such as adjustment of powder particles of raw materials and the like, and good pulverization can be performed.

[Brief description of the drawings]

The drawings show an embodiment of the crushing fluidized-bed drying apparatus of the present invention, FIG. 1 is a cross-sectional view of the lower part of the fluidized-drying tower of the present invention, FIG. 2 is a plan view of the rotary impeller of the present invention, and FIG. FIG. 3 is a side view of FIG. DESCRIPTION OF SYMBOLS 1 ... Fluid drying tower, 2 ... Sliding crushing part, 4 ... Rotary impeller, 6 ... Sliding crushing part, 11 ... Suction impeller, 14 ... Chute part

Claims (1)

(57) [Claims] 1. A duct leading to a pulverized fine powder recovery device is provided on the ceiling, an inlet for raw materials and the like and a hot air blow-in port are provided below, and a rotary impeller for crushing the raw materials and the like is provided on the bottom. In a vertical tower-shaped crushing fluidized dryer disposed in a crushing fluidized drying device, the bottom of the crushed fluidized dryer is slightly larger than the diameter of the rotating impeller and shallower than the radius thereof. A crushing blade is radially attached to the sliding crushing portion through a boss penetrating the rotating shaft on both sides of the center plate provided on the center of the rotating shaft. Rotating blades provided with suction blades are rotatably arranged on both outer sides of the blades, and a chute from which the raw material and the like falls down in a sliding state toward the rotating blades from the input port to the sliding crushing section is provided. On the opposite side, parallel to and above the sliding crushing section The wind blowing inlet is obtained by the configuration provided in multiple stages.