JPH01147280A - Revolution type ventilation drier - Google Patents

Abstract

PURPOSE: To prevent uneven water contents from being produced on a dried article by providing a hot air supply pipe where a tip end hot air blowoff nozzle is located at a lower portion in a dryer body penetrating one hollow rotary shaft, and a wet air discharge pipe where a tip end wet air discharge nozzle is located at an upper portion in the dryer body penetrating another hollow rotary shaft. CONSTITUTION: A dryer body 1 is adapted to be rotated around hollow rotary shafts 1a, 1b, and a hot air blow off nozzle 4b provided on a tip end of a hot air supply pipe 4a penetrating the hollow rotary shaft 1a is located at a lower portion in the dryer body 1, and further a wet air discharge nozzle 5b provided on a tip end of a wet air discharge pipe 5a penetrating the hollow rotary shaft 1b is located at an upper portion in the dryer body 1, and furthermore the wet air discharge nozzle 5b is covered with a wet air dust filtration filter 5c. An article to be dried is dried with an agitation action of the rotating dryer body 1 and heating action of hot air blown off from the hot air blowoff nozzle 4b.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a method for drying materials such as mud, powder, granules, and lumps by drying them with hot air while preventing dust from entering the dryer body. This invention relates to a rotary ventilation dryer that dries the air by drying.

(Prior art) A conventional ventilation dryer is equipped with a box-shaped dryer main body with multiple ventilation shelves, and a number of containers whose bottoms are made of wire mesh or perforated plates, and drying materials are stored at the same time. 5 Then, put each container into the dryer main body and support it by the above columns 5 Then, hot air is supplied into the dryer main body to dry the items to be dried in each container. When drying is completed, the containers are taken out of the dryer body from each column inside the dryer body.

(Problems to be Solved by the Invention) The conventional ventilation dryer is of a stationary type, and it is difficult to stir the material to be dried stored in the container during drying. Moisture unevenness occurs between the upper and lower layers and between the products in each container. In addition, the items to be dried are stored in the same containers.
Next, each container is put into the dryer main body, and after being supported by each column, it is dried with hot air.When drying is completed, each container is taken out from each column inside the dryer main body. , it takes a lot of time and effort to prepare and take out the materials to be dried. Also, there are a lot of containers.

The problem is that the surface area of the entire container is large, making it extremely likely that dust will get mixed in, making it unsuitable for drying high value-added products.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems, and consists of a double cone type drying method in which one half and the other half are formed in a truncated conical shape with the central part as the border. A machine body, one and the other hollow rotating shafts fixed to both sides of the center of the dryer body, and a rotation drive device for the hollow rotating shafts.

A hot air supply pipe that passes through one of the hollow rotating shafts and has a hot air blowing nozzle at its tip located inside the dryer main body, and a hot air supply pipe that passes through the other hollow rotating shaft and has a humid air discharge nozzle at its tip located in the dryer main body. It is characterized by comprising a humid air exhaust pipe located within the duct.

The object of the present invention is to prevent moisture unevenness from occurring in the product after drying. The time and effort required to prepare and take out the materials to be dried can be saved. A further object of the present invention is to provide an improved rotary ventilation dryer that can prevent dust from entering during drying and is suitable for drying high value-added products.

(Function) The rotary ventilation dryer of the present invention is constructed as described above. First, the drying material inlet and outlet of the main body of the dryer is opened to remove mud, powder, granules, etc. After putting the material to be dried into the main body of the dryer, close the inlet and outlet for the material to be dried and then start the rotary drive device to transmit the rotation to the rotating hollow shaft and move the main body of the dryer to the hollow rotating shaft. Rotate around the center to agitate the material to be dried inside the dryer main body. At this time, the air inside the dryer body is discharged outside the dryer body through the humid air dust filtration filter, humid air discharge nozzle, and humid air discharge pipe, while the hot air is discharged from the hot air supply pipe to the hot air blowing nozzle (to the material to be dried). The hot air is blown out into the dryer main body through the hot air blowing nozzle (which is mostly buried), and the drying material is affected by the stirring action of the rotating dryer main body as described above and the heating action of the hot air blown from the hot air blowing nozzle as described above. Dry things. Continue this state for a certain period of time until the drying material has finished drying.

Stop the rotary drive device, turn the drying material inlet and outlet of the dryer body downward, open the drying material inlet and outlet, and remove the dried material from the dryer body. Discharge.

(Example) Next, the rotary ventilation dryer of the present invention will be explained with reference to an example shown in Figs. 1 and 2. (1) is a double cone type dryer main body; , the one-half part and the other part are formed in a symmetrical truncated conical shape with the central part as a boundary. In addition, (la) (lb) are one and the other hollow rotating shafts fixed to both sides of the center of the main body (1) of the dryer, (6) (6
) are bearings that rotatably support the hollow rotating shafts (la) and (lb), (2) is a rotational drive motor, (2a) is a sub-block fixed to the output shaft of the rotational drive motor (2), (2b) is the sprocket fixed to the hollow rotating shaft (1b), (2c) is the sprocket 1 to (2a)
(2b) Start the three-rotation drive motor (2) with the chain suspended between the sprocket (2a) - chain (2C) - sprocket (2b) - hollow rotating shaft (
1b) and move the dryer body (1) onto the hollow rotating shaft (1a
) (lb). In addition, (3) is an openable and closable drying material inlet and outlet provided in the dryer main body (1), and (4a) is the hollow rotating shaft (
The hot air supply pipe passing through 1a), the same hot air supply pipe (4a)
A hot air blowing nozzle (4b) provided at the tip of the dryer body (1) is located in the lower part of the dryer body (1). Further, (5a) is a humid air discharge pipe passing through the hollow rotating shaft (1b), and a humid air discharge nozzle (5b) provided at the tip of the isothermal air discharge pipe (5a) is connected to the dryer main body (1). Located at the inner bottom.

The isothermal air discharge nozzle (5b) is covered by a moist air dust filter (5c). Further, (12) is an air circulation damper provided in an air circulation system connecting the humid air discharge pipe (5a) and the hot air supply pipe (4a), and (9) is a blower provided in the air circulation system; 10) is a heat exchanger installed in the same air circulation system, (11) is an intake filter connected to the air circulation system on the suction side of the blower (9), and (8) is the same intake filter (11) and the above blower (9). ) An intake air volume adjustment damper installed between the air circulation system on the intake side, and (7) an exhaust volume adjustment damper installed on the air pipe branched from the humid air discharge pipe (5a), so that the air pipe is connected to the atmosphere. It's open.

Next, the operation of the rotary ventilation dryer shown in FIG. 1.2 will be explained in detail. First, open the drying material input/output port (3) of the dryer main body (1) and remove the slurry.

After putting the material to be dried such as powder, granules, or lumps into the dryer main body (19), close the material inlet and outlet (3) for the material to be dried (5).
Next, start the rotational drive motor (2).

The rotation is sprocket (2a) - chain (2C) →
Sprocket - (2b) - Transmits to hollow rotating shaft (1b),
The dryer body (1) is rotated around the hollow rotating shafts (la) and (lb) to agitate the material to be dried in the dryer body (1). Further, the exhaust volume regulating damper (7) and the intake volume regulating damper (8) are maintained at appropriate opening degrees depending on the amount of evaporated water. Also, open the air circulation damper (12) and open the air blower (9).
Start up the dryer body (1), guide the humid air inside the dryer body (1) to the humid air dust filter (5c) - humid air discharge nozzle (5b) - humid air discharge pipe (5a), and remove some of the humid air to the exhaust volume. While releasing the damp air to the atmosphere from the regulating damper (7), the remaining humid air is sucked in the direction from the air circulation damper (12) to the blower (9). At this time, outside air is sucked through the intake filter (11) and the intake air amount adjusting damper (8), mixed with the humid air, and guided to the blower (9). In addition, the air discharged from the blower (9) is guided to the heat exchanger (1o) and heated there, and the hot air discharged from the heat exchanger (10) is transferred to the hot air supply pipe (4a).
The hot air blowing nozzle (the hot air blowing nozzle that is almost buried in the material to be dried) (4b) blows out into the dryer main body (1), and the stirring action of the dryer main body (1) rotating as described above and the above-mentioned The material to be dried is dried by the heating action of the hot air blown from the hot air blowing nozzle (4b). Also, when the drying of the material to be dried is completed, the blower (9) is stopped,
Also, stop the rotational drive motor (2) and dryer main body (
1) Turn the drying material inlet and outlet (3) downward.

The dried material inlet and outlet (3) is opened to discharge the dried material to the outside of the dryer main body (1).

Note that while the air circulation damper (12) remains closed, the exhaust volume adjustment damper (7) and the intake volume adjustment damper (8)
Drying may also be carried out with the chamber open, ie without air circulation.

(Effects of the Invention) As described above, the rotary ventilation dryer of the present invention first opens the drying material inlet and outlet of the dryer body.

After putting the materials to be dried such as mud, powder, granules, and lumps into the main body of the dryer, close the material inlet and outlet for drying. The information is transmitted to the hollow shaft, the dryer main body is rotated around the hollow rotating shaft, and the material to be dried inside the dryer main body is agitated. Also, at this time, the air inside the dryer body is discharged to the outside of the dryer body through the humid air dust filtration filter humid air discharge nozzle and humid air discharge pipe.
The hot air is blown into the dryer main body through the hot air supply pipe and the hot air blowing nozzle (the hot air blowing nozzle is almost buried in the material to be dried), and the agitation action of the rotating dryer main body as described above and the above-mentioned Since the material to be dried is dried by the heating action of the hot air blown from the hot air blowing nozzle, the material to be dried can be dried uniformly, and no moisture unevenness will occur in the product after drying.

When drying starts, the material to be dried is introduced into the dryer body through the material inlet and outlet of the dryer, the material inlet and outlet are closed, and the material to be dried is dried. Once drying is completed, stop the drive device for one rotation, turn the drying material inlet and outlet of the dryer body downward, open the drying material inlet and outlet, and dry the dried material. Since the drying material is to be discharged outside the main body of the dryer, the material to be dried is stored in each container as in the conventional method, and then each container is placed into the main body of the dryer.

After supporting each column, it was dried with hot air.

In addition, once drying is complete, there is no need to take out the containers from each column inside the dryer, which is a tedious task, reducing the time and effort required to load and remove the items to be dried. can.

Furthermore, during drying, the inside of the dryer body can be sealed, preventing dust from entering, which is advantageous for drying high value-added products.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing an embodiment of the rotary ventilation dryer according to the present invention, and FIG. 2 is an explanatory diagram showing the stirring state of the material to be dried. (1)...double cone type dryer body, (la)
... One hollow rotating shaft, (lb) ... The other hollow rotating shaft, (2) (2a) (2b) (2c)...
・Rotation drive device, (4a)...Hot air supply pipe, (4
b) ...Hot air blowing nozzle, (5a) ・
...Moist air discharge pipe, (5b) ...Moist air discharge nozzle.

Claims (1)

[Claims] A double cone type dryer body in which one half and the other half are symmetrical in the shape of a truncated cone with the center as a boundary, and one and the other hollow rotating shafts fixed to both sides of the center of the dryer body. ,
A rotary drive device for the hollow rotating shaft, a hot air blowing nozzle at the tip passing through one of the hollow rotating shafts, and a hot air supply pipe located at the lower part of the dryer main body, passing through the other hollow rotating shaft. A rotary ventilation dryer characterized in that a humid air discharge nozzle at the tip includes a humid air discharge pipe located at an upper part of the dryer main body.