JPS6310475Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to a drying air generator for a grain dryer, and in particular, the invention relates to a drying air generating device for a grain dryer, and in particular, the invention relates to a drying air generator for a grain dryer. A grain dryer that has a flow path with a shielding plate as a wall facing the hot air outlet on the side, and allows outside air to flow through this flow path to prevent the grain section on the upstream side of the air flow path from being excessively heated. This invention relates to a drying air generator.

[Technical background of the invention]

A grain dryer circulates and dries grain until a stop moisture value is reached within the machine. At this time, the water content of the grains is removed in the drying section 2 shown in FIG. The drying section 2 is composed of a combustion section 4 that generates high-temperature air, an exhaust section 6 that discharges this air, and an air passage 8 provided between the combustion section 4 and the exhaust section 6. In the air passage 8, there are ventilation plates 10 arranged in parallel in the air flow direction, a partition plate 12-1 on the upstream side of the air flow and a partition plate 12-2 on the midstream side of the air passage 8, provided in a direction perpendicular to the ventilation plate 10. A grain flow path 14 is provided to intersect with the air path 8. The grain flow path 14 divides the air path 8 into a hot air path 16 and an exhaust air path 18.

High-temperature air generated in the combustor 20 of the combustion section 4 flows out from the hot air port 24 of the combustion tube 22. This high-temperature air is mixed with outside air taken in from the intake hole 30 of the hot air duct 28 by the suction action of the exhaust fan 26 provided in the exhaust section 6, and the dry air is generated and introduced into the distribution duct 32. The drying air is divided by the partition plate 12-1 on the upstream side of the airflow, and passes from each hot air path 16 through the grain flow path 14 to dry the grains. The drying air after drying is discharged to the outside from the exhaust passage 18 through the exhaust duct 34.

[Problems with background technology]

In the drying section 2 having such a configuration, the combustor 20 is arranged approximately on the center line C of the air passage 8 so that the drying air for drying the grains is evenly distributed in the hot air passage 16. Therefore, the partition plate 12-1 constituting the upstream side of the air passage 8 of the grain flow passage 14 is connected to the hot air opening 2 of the combustion tube 22.
4, and will be exposed to high temperature air due to combustion. Therefore, the partition plate 12-1 on the upstream side of the wind is heated to a high temperature by the heat transfer from the dry air and the radiant heat from the combustor 20, causing thermal deformation of the partition plate 12-1 and High temperatures have caused deterioration of grains flowing down near the river.

[Specific purpose of the idea]

This invention solves these problems and prevents the upstream side of the grain flow path from being excessively heated, thereby maintaining the quality of dried grains, as well as maintaining and improving drying performance. The purpose is to realize a drying air generator for a grain dryer.

[Structure of the idea]

In order to achieve this purpose, this invention has a hot air outlet and a hot air outlet on the upstream side of the grain flow passage, which is arranged to cross the air passage between the combustion part and the exhaust part and dry the grain. A flow path is provided in which the shielding plate serving as a wall serves as a path wall, and this flow path has a configuration in which a starting end opens at the outside air intake port and a terminal end opens inside the dryer. According to this configuration, the cold outside air passing through the flow path and the high-temperature dry air exchange heat, so that the upstream side of the air flow path of the grain flow path is cooled and the outside air is warmed.

[Example of idea]

Next, an embodiment of this invention will be described in detail based on the drawings. 2 to 4 show a first embodiment of the dry air generator according to this invention. In the figure, the same parts as in FIG. 1 are given the same reference numerals.

Partition plate 12 configuring the wind upstream side of grain flow path 14
-1 is provided with a shielding plate 36 having a trapezoidal cross section in order to separate the drying air into each hot air path 16. This shielding plate 36 is disposed further upstream of the partition plate 12-1, surrounds the partition plate 12-1, and faces the hot air port 24 of the combustor 20. Partition plate 12-1 and shielding plate 36
In order to allow outside air to flow through the flow path 38, an outside air intake port 40 is provided at the lower end of the flow path 38, as shown in FIGS. An inlet 42 serving as an outlet into the dryer is provided.

According to this embodiment, when drying is started, drying air flows into the hot air path 16 from the distribution duct 32 due to the suction action of the exhaust fan 26. At this time, the shielding plate 36
The air in the flow path 38 is sucked through the inlet 42 of the flow path 38 . Due to this suction, the cold outside air flowing into the flow path 38 from the intake port 40 exchanges heat with the heated shielding plate 36 and becomes warm, and warm air is sucked into the hot air path 16 from the introduction port 42 . Therefore, the partition plate 12-1 on the upstream side of the air flow path of the grain flow path 14 is prevented from being directly exposed to high-temperature air by the shielding plate 36 facing the hot air port 24, and the The partition plate 12-1 and the shield plate 36 are cooled by the fresh outside air and are not heated excessively. Therefore, it is possible to prevent thermal deformation of the partition plate 12-1, and it is also possible to prevent the dried grains from deteriorating due to high temperatures in the grain flow path 14. In addition, by introducing the outside air in the flow path 38 that has been warmed by heat exchange into the combustor, it is possible to prevent the combustor from overflowing due to a temperature drop caused by the cold air at night, and to obtain stable combustion. can. In addition, the amount of drying air can be increased by sucking the warmed air into the air path through the inlet of the distribution plate, which reduces pipe resistance. By doing so, it is possible to prevent or improve drying performance, reduce fuel consumption, and contribute to energy saving.

FIG. 5 is an enlarged sectional view showing a second embodiment of this invention. In this embodiment, an intake port 40 is provided at the upper end of the flow path 38, and the lower end is extended to the outside of the distribution duct 32 by a communication path 44 serving as an output port. This communication passage 44 and an intake passage 46 to the combustor 20 are communicated by a bellows 48 to supply outside air to the combustor 20.

According to this embodiment, when the combustor 20 is operated to start drying, the air in the intake passage 46 is sucked by the intake action of the intake fan 50 of the combustor 20. Due to this suction, cold outside air flows into the flow path 38 from the intake port 40 to cool the upstream side of the grain flow path 14 on the airflow side, thereby preventing deterioration of the grain due to heating. In addition, the air warmed in the flow path 38 flows into the combustion machine 20,
In addition to improving combustion efficiency, it is possible to prevent fuel from overflowing from the combustor 20 when the outside temperature drops, such as at night, and to achieve stable combustion.

FIG. 6 is a partial sectional view showing a third embodiment of this invention. In this embodiment, the outside air flowing through the flow path 38 is supplied to the combustor 20 as in the second embodiment, and the shielding plate 3 is positioned below the flow path 38.
6 is provided with an inlet 42.

Therefore, in the third embodiment with this configuration, the airflow upstream side of the grain flow path 14 can be cooled by the outside air flowing through the flow path 38 to prevent deterioration of the grain due to heating, and the introduction port 42 is provided. Drying performance can be improved by increasing the amount of drying air. Furthermore, since warmed air can be introduced into the combustor 20 through the intake passage 46, combustion efficiency can be improved, overflow can be prevented when the temperature drops, and stable combustion can be achieved.

[Effect of idea]

As described above, according to this invention, the upstream side of the grain flow path provided across the air flow path is cooled by heat exchange between the cold outside air flowing through the flow path and the high-temperature dry air, thereby preventing excessive It is possible to prevent temperature rise, prevent thermal deformation of partition plates in the grain flow channel and deterioration of grain quality, and maintain drying performance. Furthermore, since the drawn outside air is warmed, the drying performance can be improved by introducing this warmed outside air into the dryer.

[Brief explanation of the drawing]

FIG. 1 is a horizontal sectional view of a drying section of a conventional grain dryer. 2 to 6 show examples of this invention, FIG. 2 is a horizontal sectional view of the drying section showing the first embodiment, FIG. 3 is a sectional view taken along the - line in FIG. FIG. 5 is an enlarged sectional view of the combustion section showing the second embodiment, and FIG. 6 is an enlarged sectional view of the combustion section showing the third embodiment. In the figure, 4 is a combustion section, 6 is an exhaust section, 8 is an air passage, 12-1 is a partition plate on the upstream side of the air passage, 14 is a grain flow passage, 20 is a combustor, 24 is a hot air outlet, and 36 is a shielding plate. , 38 is a flow path, 40 is an intake port, 42 is an inlet port,
46 is an intake passage to the combustor 20.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A grain flow path is provided to dry grains, intersecting with an air path interposed between a combustion section that generates high-temperature air and an exhaust section that sucks and discharges the air. A shielding plate is provided on the airflow upstream side of the grain flow channel to face the hot air outlet, and a flow path is further provided with the shielding plate as a road wall, which starts at the outside air intake and ends at the outlet. A drying air generator for a grain dryer characterized by: 2. The drying air generating device for a grain dryer according to claim 1, wherein the flow path has a starting end opening at an outside air intake port and a terminal opening opening at an inlet provided in the shielding plate. 3. The drying air generating device for a grain dryer according to claim 1, wherein the flow path has a starting end opening at the outside air intake port and a terminal opening opening at the combustor of the combustion section. 4. The utility model registration claim 1, wherein the flow path has a starting end opening at an outside air intake port and a terminal opening opening at an inlet provided in the shielding plate and a combustor of the combustion section, respectively. Drying air generator for grain dryer.