JPH0631479U - Multi-stage band dryer - Google Patents

Abstract

(57) [Summary] [Purpose] Structurally simple, with a small installation space,
The purpose is to supply a dryer for small fish that uses hot air with good thermal efficiency. [Composition] Warm air is generated by mixing air with combustion gas, and drying is performed with the warm air. The warm air is introduced from the lower part of the dryer main body, passes through the conveyor band, and is exhausted to the outside by the exhaust fan provided in the dryer main body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-stage band drying device for drying small fish and the like using hot air.

[0002]

[Prior art]

 The conventional method of producing dried sardines for small fish (shirasu, crepe) is to boil the small fish and then dry them in the sun or dry them in a dryer and then dry them in the sun. Drying in the sun alone is affected by the weather and it is difficult to manufacture uniform products. Therefore, dryers using warm air, cold air, and far-infrared heaters are being made. Since these devices are large-scale and often use electricity or steam as a heat source, they have poor thermal efficiency, and in addition, they often require time-consuming operation / maintenance inspections. Further, when the drying temperature becomes high, there are problems that an oil burning phenomenon occurs and proteins on the surface are discolored.

[0003]

[Problems to be solved by the device]

 An object of the present invention and a problem to be solved are to provide a dryer for small fish or the like that is structurally simple, has a small installation space, and has high thermal efficiency.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, hot air is generated by mixing the air with the combustion gas, and the hot air is used for drying. Warm air is introduced from the bottom of the dryer body, passes through the conveyor band, and is exhausted to the outside by the exhaust fan installed at the top of the dryer body.

[0005]

[Action]

 By directly mixing the combustion gas with the air from the blower, 100% of the heat generated by the combustion of the gas can be utilized. The efficiency can be improved by 30% or more compared to the case of using a steam boiler and a steam heat exchanger. Furthermore, a heat exchanger is not required, which simplifies the structure.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. The dryer is composed of several stages of conveyors (8), and one end of the uppermost conveyor band is taken out from the opening of the dryer main body, and the inlet (7) of the material to be dried is placed. Form. From the uppermost conveyor band to the lower conveyor band, and further to the lower conveyor band, the material to be dried is conveyed to the lowermost conveyor band while moving on the conveyor belt, and then discharged to the outside. Be done. Below the lowermost conveyor band, a hot air passage, that is, a wind passage portion (16) is formed, and a plurality of wind direction plates (6) are installed in the wind passage portion. At the bottom of the dryer main body, an insertion port for inserting warm air into the air passage is provided, and is connected to the hot air generator (2) by a duct (4).

The hot air generator is composed of (2), a blower (3), a combustion furnace (17) and a duct (4). Further, the combustion furnace (17) is composed of a burner device (12), a combustion tube (11), a combustion furnace box (17) and a wind vane (18). The burner device (12) uses a gas-fired proportional combustion gas burner, and the combustion of the gas burner is controlled by the measured value and the set temperature by a temperature sensor attached to the air passage of the dryer or the like.

A mechanism of hot air generation in the hot air generator will be described. The flame from the burner unit burns in the combustion cylinder, the combustion cylinder is heated, and part of the flame can be discharged to the outside from the open portion of the combustion cylinder. The air from the blower is heated by touching the combustion cylinder in the combustion furnace and being heated by being mixed with the flame from the burner device, is rectified by the wind direction plate of the duct, and is directed to the air duct of the dryer. Is inserted. The wind passage is provided with multiple wind direction plates, and the hot air flows toward the upper part, passes through the conveyor bands at each stage, and is sucked out by the exhaust fan at the upper part of the dryer and carried out to the outside. In addition, multiple heaters will be installed above the conveyor band. The solid line with an arrow in Fig. 3 shows the path from the loading to the unloading of the material to be dried, and the dotted line with an arrow shows the air flow from the blower to the blower.

[0009]

[Effect of device]

 Because warm air has a specific gravity, it has the property of naturally rising upwards, and compared to a dryer that blows warm air from top to bottom, the capacity of the blower can be reduced. Furthermore, as the product is dried as it goes down, it is easy to adjust the drying temperature of the finished product, and it is possible to prevent the product from discoloring due to excessive temperature rise. Furthermore, multiple heaters are placed on the conveyor band. By installing it, it became possible to dry the material to be dried in the upper part at a higher temperature than warm air, and the drying efficiency improved. Furthermore, because a heat exchanger using steam is not required, the volume of the dryer itself has become smaller when comparing the drying capacities of the same capacity.

[Brief description of drawings]

FIG. 1 is a longitudinal section of an embodiment of the present invention.

2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory view of the flow of warm air and a material to be dried according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dryer main body 2 Hot-air stove 3 Blower 4 Duct 5 Exhaust device 6, 18 Wind direction plate 7 Input port 8 Conveying device 9 Ejection port 10 Heater 11 Combustion cylinder 12 Burner device 13, 14, 15 Damper 17 Combustion furnace box

Claims (1)

[Scope of utility model registration request] 1. A multi-stage band dryer having several stages of conveyor conveyers, an air passageway through which warm air flows under the bottommost conveyer conveyer, and a plurality of air exhausters at the upper part of the main body. An inlet for hot air from the hot air generator is provided at one or both ends of the hot air, and the hot air introduced from the hot air blower passes through the air passage section and is provided with a plurality of guide plates provided in the air passage section. A multi-stage, characterized in that a hot air passage is formed from the lowest conveyor band to the highest conveyor band and further to the exhaust air at the top of the dryer main body, and a plurality of heaters are provided at the upper part of the conveyor on the way. Band dryer.