JPH01260285A - Drying machine - Google Patents

Abstract

PURPOSE:To stagnate a drying article for a stagnating time in accordance with the degree of drying and contrive to discharge a perfectly dried article, by a method wherein screens are attached to agitating rotary impellers in a horizontal cylindrical drying case with spaces in the longitudinal direction of the cylinder while the mesh and opening rate of the screen are made smaller sequentially toward a discharging port in accordance with the dried condition of the drying article. CONSTITUTION:Green articles, crushed by a crusher, are agitated by a plurality of impellers 29, attached to a rotary shaft 28 in a horizontal drying case, and are transferred sequentially by hot airflow while being dried. Impellers with screens 33A-33D are attached to the proper positions of the rotary shaft 28 with proper spaces. The mesh and the opening degree of the screens are formed so as to become smaller sequentially from the impeller with screen 33A to the same 33D. Accordingly, the articles whose drying is delayed can not pass through the screens and are stagnated whereby the drying time for the articles is elongated and only the articles, which are dried to a degree capable of passing through the mesh, are supplied to the next screen. Therefore, the articles discharged finally may be dried perfectly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention is a dryer for drying oil residue obtained by squeezing sake brewers or beans into powder.

(Prior art) Conventionally, in order to dry sake brewers, etc. into powder, the sake brewers, etc. that need to be dried are placed in a horizontal cylindrical drying case in which hot air is circulated, and the impeller inside the drying case is driven by external power. By passing through a hot air dryer, the sake brewer inside the drying case is stirred and dried with hot air.

(Problem to be Solved by the Invention) In this case, the material to be dried, such as a sake brewer, etc., is put into the drying case from one end on the upstream side of the hot air while remaining in a lumpy state to some extent containing moisture, and then the other end on the downstream side of the hot air is poured into the drying case. It is desirable that the dry powder is discharged from the container.

However, in reality, although the type, shape, specific gravity, degree of moisture absorption, etc. of the items that need to be dried put into the drying case are not constant, the items that need to be dried are determined by the preset operating conditions of the dryer. Since the powder is discharged from the dryer after an approximately fixed period of time has elapsed, there is a drawback that incompletely dried matter is mixed into the dried powder, degrading the quality of the dried product.

As a countermeasure, for example, it may be possible to lengthen the drying time, but in this case, not only will production costs increase, but depending on the type of material that needs to be dried, it may be overheated and reduce the quality of the powder product. There were drawbacks such as:

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a dryer in which the residence time within the drying case naturally changes depending on the shape of the mass of the material to be dried, the degree of moisture absorption, etc., which is put into the drying case.

(Means for Solving the Problems) The present invention has a horizontal cylindrical drying case at one end through which hot air from a drying heat source passes through, a supply port for supplying the material to be dried into the drying case, and the other end thereof. A delivery port is formed in the drying case for sending out the dried material to the outside, and an outlet is formed at an arbitrary distance from one end of the drying case to the other end in accordance with the type of material to be dried and its condition before drying. The dryer is equipped with a screen having an arbitrary mesh and opening ratio set in advance, and a stirring blade that can be rotated by an external power. It can also be made smaller.

In a dryer configured in this way, when the drying material is put into the drying case through which hot air is circulated through the supply port at one end, the drying material is fed into the drying case through the blades rotating inside the drying case through which the hot air circulates. Drying progresses while being agitated by the drying process, and during this drying process, items with large external shapes gradually lose their shape and become smaller.

Therefore, since large-sized items cannot pass through the screen as they are, the residence time in the drying case becomes longer, ensuring sufficient drying time, while smaller-sized items can pass through the screen as is. and is discharged from the dryer in the short time required for drying.

By gradually decreasing the size of the screen mesh from one end of the drying case to the other end, it is possible to ensure an appropriate drying time corresponding to the size of the material to be dried. The present invention stably and improves the quality of dried products by naturally changing the residence time of the material to be dried in the drying case depending on the shape of the mass of the material to be dried, the degree of moisture absorption, etc. Moreover, the production cost of dry powder can be significantly reduced.

(Example) Next, the configuration of an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a system diagram of the entire dryer 1, and shows the hot air stove 2.
The hot air from the drying heat source generated by the oil burner 3 is transferred from the material supply port 5 for drying material formed upward at one end of the horizontal cylindrical drying case 4 to the drying material supply port 5 formed upward at the other end of the drying case 4. The dried product powder is sent to each hopper 7 of the five-unit cyclone through the powder delivery port 6, and the dried product powder is transferred to the screw conveyor 8 below the hopper 7 by the cyclone and its own weight.
From there, the products are sent to an external product silo (not shown) and stocked while being cooled by a cooling air blower 9.

On the other hand, the hot air sent to each Boppaff of the five-barrel cyclone is sucked into the exhaust fan 10, and then sent to the hot air stove 2 through each valve 11 and 12 for circulation. is sent to the oil burner 15 of the deodorizing furnace 14,
The deodorizing furnace 14 passes through heat exchangers 16 and 17 and is discharged into the atmosphere in a deodorized state. Air is sent through each of the heat exchangers 16, 17 while being heated, while being appropriately controlled by valves 20-22.

Further, the drying material supply port 5 of the horizontal cylindrical drying case 4 is provided with a material supply port 5 for turning the lumpy drying material wet material supplied by the inter-running feeder 23 into specific nice granules that can be easily dried under certain conditions. The crusher 24, in this case, as shown in FIG. The wet raw material is transported by a pumping shaft 28 driven by a motor 27.
Impeller 2 installed at arbitrary interval positions preset in
In this case, as shown in FIGS. 6 and 7, an impeller 29 has stirring blades 32 attached at equal intervals on the circumference of a ring 31 supported by spokes 30, and a screen with disk-shaped blades. 33A to 33D, in this case, as shown in FIGS. 8 and 9, two sets of impellers 34 and 35 have stirring blades 32 attached at equal intervals on the circumference of a ring 31 supported by spokes 30. Disc-shaped bladed screens 33A to 33D are provided with disc-shaped screens 36A to 36D having arbitrary meshes and aperture ratios shown in FIGS. The hot air flows through the cylindrical drying case 4 in the flow direction while being stirred in a heated state by four sets of disc-shaped bladed screens 33A to 33D (see FIG. 5) that are made smaller in size from one end of the case 4 to the other end. from the first fixation along the right direction.

Next, the operation of this embodiment will be explained.

In the dryer 1 configured in this way, each oil burner 3.15 performs a combustion operation, each blower Ia 9.18 and turbo blower 19 perform a rotation operation, and the blades 25 of the crusher 24 and the stirring shaft of the drying case 4 28 rotation drive motor 26.27
In the hot air circulation state in which the pulverizer is operating, dry wet materials of various sizes are fed into the crusher 124 from the running feeder 23, and at the same time, the crusher 24 is fed with dry raw materials of various sizes except for the degree of moisture absorption. Wet raw material to be dried, which has been crushed into particles of a specific size that can be easily dried under certain conditions, is fed into the drying case 4 through the supply port 5 at one end thereof.

The input material to be dried, which has a substantially constant shape, is dried while being stirred by the rotating impeller 29, 34, 35 in the drying case 4 through which hot air flows, and during this drying process, the external shape of the material to be dried gradually collapses. becomes smaller.

Therefore, depending on the degree of moisture absorption of the material to be dried at the time of feeding and the degree of drying progress due to uneven stirring, etc., the shape will not be easily deformed, and it will not be able to pass through the drying ¥38A to 38D partitioned by each screen 36A to 360 as it is. Therefore, the residence time in the drying case 4 becomes longer (and the necessary drying time can be secured sufficiently), and items that dry quickly and become smaller in size can be directly transferred to each screen 33A.
~ 33D, and is sent from the powder outlet 6 of the drying case 4 to each hopper 7 of the five-unit cyclone in the short time required for drying, as well as the screw conveyor 8 below the hopper 7 and the cooling blower 9. The product is sent to the product silo and stored there.

Note that in this embodiment, the meshes of the screens 36A to 36D are made smaller sequentially from one end of the drying case 4 to the other end, but even if this is kept constant, the mesh size of the screens 36A to 36D is small compared to the size of the drying case 4 in the axial direction. The residence time of the dried material in the drying case 4 can be increased, and each impeller 29.3
4.35 can be of any shape, such as a simple blade.

In this way, in the case of this dryer 1, the residence time of the material to be dried in the drying case 4 is naturally changed according to the shape of the mass of the material to be dried, the degree of moisture absorption, etc., which is put into the drying case 4, and the drying The production cost of dry powder can be significantly reduced while maintaining stable and improved product quality.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the entire system of an embodiment of the present invention, FIG. 2 is a front view of the drying case 4, FIG. 3 is a right side view of FIG. 2, and FIG. 4 is the crusher 24. An enlarged view of FIG. 5 shows the stirring shaft 28, impeller 29, and each impeller screen 3.
3A to 33D [Detailed view showing the state of installation, Figure 6 is a front view of the impeller 29, Figure 7 is a cutaway side view of Figure 6,
FIG. 8 is a front view of the bladed screens 33A to 33D, FIG. 9 is a cutaway side view of FIG. 8, FIG. 10 is a front view of the disk-shaped screen 36A, and FIG. 11 is the disk-shaped screen 36B.
FIG. 12 is a front view of the disk-shaped screen 36C, and FIG. 13 is a front view of the disk-shaped screen 36D. 1... Dryer 4... Drying case 5...
- Supply port 6... Outlet port 27... - Motor 28... Stirring shaft 29... Impellers 33A to 33D... Screen with impeller Applicant: Tokai Flour Sewing Co., Ltd. 1 Manufacturing Co., Ltd.

Claims (2)

[Claims] (1) A supply port for supplying the material to be dried into the drying case is formed at one end of the horizontal cylindrical drying case through which hot air from the drying heat source passes, and the other end is used to supply the dried material to the outside. Arbitrary meshes and openings are formed in advance to form a delivery port for delivery, and are set in advance at arbitrary intervals from one end of the drying case to the other end in accordance with the type of material to be dried and its pre-drying state. A dryer equipped with a ratio screen and stirring blades that can be rotated by external power. (2) The dryer according to claim 1, wherein the mesh of the screen is gradually made smaller from one end of the drying case to the other end.