JPH0219370B2 - - Google Patents

Description

Detailed Description of the Invention <Industrial Application Field> The present invention is a method for crushing and drying recycled materials such as used paper, industrial waste, and other materials into fine powder, and disposing a device for collecting the powder for fluid classification. This relates to a drying device.

<Prior Art> An overview of a device called a fluidized classification drying device 1 for finely crushing recycled materials from waste paper, industrial waste, and other materials is as follows: rotary impellers 2, 2; 2, insert the crushed material inlet 7
and a hot air inlet 6 are arranged, and the high-speed rotating crushing impellers 2, 2 are driven by a power source so that one side is clockwise;
The other side rotates counterclockwise at high speed, and the above-mentioned materials, which are continuously fed into the fluidized classification drying device from the crushed material inlet 7, are first finely crushed, and the crushed pieces are transferred into the classification device. The objects are thrown into the air, the objects are collided with each other, and the impact further shatters the objects. When these fragments fall under their own weight to the location where the impeller is placed in the classification device, they are again thrown together with the objects that are continuously fed by the impeller. The hot air inlet Step 6 blows hot air to dry the crushed material, and the fine powder is so finely divided that it scatters and floats on the ceiling of the device. This is configured to be collected in a separation layer 9 connected by a duct 10 through a discharge port 8, but during operation, fine particles of the input material classified in the fluidized classification drying device are collected. Another disadvantage is that when crushed into fine powder, the fine powder adheres to the drawing side of the impeller, stacks up, and reduces the drawing of crushed pieces and the crushing efficiency over time.

This tendency is particularly noticeable when the crushed material contains a large amount of water, is highly viscous, or is fibrous.

<Problems to be Solved by the Invention> Therefore, in view of the above-mentioned conventional drawbacks, the present invention prevents fine particles of crushed material from adhering to the rotary impeller, and always maintains the above-mentioned functions inherent to the rotary impeller. The object of the present invention is to provide a fluid classifier that can exhibit the following properties.

<Means for Solving the Problems> The present invention has the following technical means for achieving the above object. That is, a part of the incinerated ash incinerated by the incinerator is taken out to a rotary impeller arranged in a fluidized classification drying device which is equipped with a separator that sucks and collects the classified materials and an incinerator equipped with a boiler. The air is sprayed through a pressurized air injection pipe equipped with a blower.

◎ Function The crushed material supplied into the fluidized classification drying device is crushed into fine particles by the repeated crushing and throwing function of the rotary impeller installed in the device, and at the same time, the crushed material is fed into the fluidized classification drying device. The material is dried by being exposed to hot air blown into it, but when this crushing and throwing function is performed, fragments or fibrous materials of the object to be crushed are stuck to the blade tip on the suction side of the blade of the rotary impeller. and reduce its functionality. However, when high-pressure air mixed with fine powder is injected from a pressure-air injection nozzle to the tip of the blade, the high-pressure air is constantly injected against the suction side of the blade of the rotary impeller. It was found that the fine powder did not adhere and the high crushing and throwing ability was maintained at all times. Since the atsushi is an inorganic and hard material, when it is struck against the blade surface or blade tip of the rotary impeller, it has the same effect as striking grinding stone powder, and the above-mentioned impact of the rotary impeller is You can remove things that are attached to the parts.

<Example> An embodiment of the present invention will be described with reference to the drawings.

1 is connected to a separation tank 9 via a duct 10 through a discharge port 8.
It is a sealed fluidized classification drying chamber connected to the fluidized classification drying chamber, and at the bottom of this fluidized classification drying chamber tank 1, there are rotary impellers 2, 2 that rotate in opposite directions by receiving power from a power source (not shown). A crushed material inlet 7 and a hot air inlet 6 are provided so as to be arranged in parallel and look into the rotary impellers 2 , 2 . or,
At the suction side blade tips of each of the pair of rotary impellers 2, 2, there is an injection port 17A of a pipe 17 that penetrates the outer wall of the fluidized classification drying device and injects pressure air mixed with ash from outside the device. I'm looking forward to it. It has already been explained in the description of the prior art that the fine powder classified by the fluidized classification dryer is collected in the separation tank 9. A part of the fine powder accumulated in the separation tank 9 is dumped into a dumping tank 13 by operating a discharge roll, and a part of this is sent by a pre-processing machine 14 to a crushed material input machine 15, where it is crushed. The crushed materials are mixed to adjust their moisture content, and the crushed materials are fed into the fluidized classification drying device through the crushed material inlet 7. The upper part of the other side of the separation tank 9 is connected to a dust collector (not shown) which is connected to a suction exhaust device via a suction duct 11 .

The dry powder discharged from the discharging roll 12 of the separation tank 9 further passes through the lock discharging roll 21, and a blower 22 is disposed in the middle to transport and burn dry powder to the incinerator 4 attached to the fluidized classification drying device. They are connected via air transport pipes.

Therefore, by operating the delivery roll 12, the blower 22
is started, and the fine powder to be used as fuel is sent from the separation tank to the incinerator 4 together with air, where it is burned. 3 is an auxiliary combustion burner for starting the incinerator.

The combustion heat of the incinerator is recovered by the boiler 5, and this heat is sent to the hot air outlet 6. This incinerator 4
The incinerated ash 23 is discharged to the outside of the incinerator 4 by a discharge conveyor 19 and dumped, but some of it is sent to a pressure-air injection pipe 17 equipped with a blower 18 by operating a delivery roll 20. It is set as.

The incineration ash incinerated in the above-mentioned incinerator is so-called ash, and is inorganic and highly hardened. This is sent to the pressure-air injection pipe 17 equipped with the above-mentioned blower 18, and this pressure-air injection pipe operates the air blower from outside the fluidized classification drying device, and the air is drawn into the rotating impeller from the pressure-air injection pipe. Spray on. It penetrates the wall and looks into the intake side 17A of the rotary impeller. (See Figure 2) This causes the debris to be struck by the rotary impeller that is crushing and throwing the input materials, thereby preventing the input materials from sticking to the rotary impeller.

<Effects of the invention> Since the present invention has the above-mentioned technical means and works, it can prevent debris particles from adhering and accumulating on the suction side of the rotary impeller blades. This has the effect of constantly maintaining high crushing and projectile ability.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention,
FIG. 1 is a statistical diagram of the device, and FIG. 2 is a sectional view near the rotary impeller. 1... Fluid classification drying chamber, 2, 2... Rotating impeller, 3
... auxiliary combustion burner for starting, 4... incinerator, 5... waste heat recovery device, 6... hot air inlet, 7... crushed material inlet, 8...
Discharge port for crushed fine powder, 9... Separation layer, 13... Crushed material inlet, 14... Pretreatment machine, 15... Crushed material inlet machine,
17... Pressurized air injection pipe, 18... Forced draft fan for supplying sand grains, 19... Incineration ash discharge conveyor, 20... Sand grain feeder, 21... Finely crushed dry powder feeder, 22... Air blower, 23... Incineration ash.

Claims (1)

[Claims] 1 A part of the incinerated ash incinerated by the incinerator is taken out to a rotary impeller installed in a fluidized classification drying device that is equipped with a separator that sucks and collects the classified materials and an incinerator equipped with a boiler. 1. A fluidized classification drying device characterized in that the air is injected through a pressure-air injection pipe comprising: