JPH03113284A - grain dryer drying equipment - Google Patents

Abstract

PURPOSE:To control the temperature of hot air generated from each burner so that it may be lower than that directly supplied by open air by supplying to each burner heat exchange hot air generated by heat-exchanging open air to be supplied to each burner by each heat exchanger device. CONSTITUTION:Each part of a grain dryer 8 and each burner 4, a moisture sensor and the like start their operation and hot air is generated from each burner 4 so that the open air sucked into each heat exchanger device 6 may be heat-exchange by the heat generated, thereby producing heat exchange hot air. The heat exchange hot air is supplied to each burner 4 by way of each heat exchange air passage. The heat exchange hot air is mixed with the hot air generated from each burner 4, thereby producing dried hot air. The heat exchanged hot air passes through each drying chamber 2 and 3 in both upper and lower stages from hot chambers 12 and 13 in both upper and lower stages and sucked and exhausted individually by way of each exhaust chamber 15 and 16 in both upper and lower stages by each exhauster 5. The exhausted air passes through each heat exchanger device 6 where heat exchange takes place between the exhausted air and the open air sucked in each heat exchanger device 6, thereby producing heat exchanged hot air, which is supplied to each burner 4 by way of each heat exchange hot air passage, thus repeating the supply circulation to each burner 4.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a drying device for a grain dryer.

Conventional technology In the past, grains flowing down from an upper grain storage chamber through two upper and lower drying chambers were heated using hot air generated from a burner installed in each drying chamber and outside air passing around the burners. The drying device was designed to dry by being exposed to the drying hot air by sucking and exhausting the drying hot air mixed with the drying hot air using an exhaust fan installed in each drying room.

Problem to be Solved by the Invention While the grain is repeatedly circulated from the upper grain storage chamber to the upper and lower drying chambers and flowing down, the hot air generated from the burner installed in each drying chamber and the Dry hot air mixed with outside air passing through the surrounding area is sucked and exhausted by the exhaust fan installed in each drying room, and passes through each drying room to remove the grain flowing down inside each drying room. The grains are exposed to this dry hot air and dried.

If the outside air temperature is low during this drying operation, the thermal efficiency may drop, but this is an attempt to eliminate this problem and to save energy.

Means for Solving the Problems This invention provides a grain storage chamber 1 in the upper part and a drying chamber 2.3 in the lower part for drying the falling grains. A burner 4 that generates hot air is provided on the other side, an exhaust fan 5 that sucks and exhausts the hot air, and a heat exchange device 6 that exchanges heat with the outside air sucked in at the tip edge of the exhaust fan 5 using the exhaust air. Before and after the drying chamber 3, the exhaust fan 5 and the heat exchange device 6 are installed below the burner 4 in the upper stage, and the exhaust fan 5 and the heat exchange device 6 in the upper stage are installed below the burner 4 in the upper stage. is provided with the burner 4, and between the upper and lower burners 4 and the heat exchange device 6, the burner 4 is connected to each heat exchange device 6.
The structure of the drying device of the grain dryer is such that an exchange hot air passage 7 is formed to supply exchange hot air exchanged.

Effects of the invention The grains are transported from the upper grain storage chamber 1 to the upper and lower drying chambers 2 and 3.
While the circulation of feeding out and flowing down is repeated, the drying chamber 2.
3 Hot air generated from a separate burner 4 and the drying chamber 2
．． 3 Each heat exchange device 6 is installed at the tip edge of the exhaust fan 5 installed separately.
The exchange hot air with which outside air has been exchanged is supplied to each burner 4 through each exchange hot air passage 7, and the dry hot air mixed with this exchange hot air is supplied to each exhaust fan 5 provided separately in the drying chamber 2.3. By suctioning and exhausting the air, the grains passing across the drying chamber 2.3 and flowing down inside the drying chamber 2.3 are exposed to the hot air and dried.

During this drying work, the outside air sucked into each heat exchange device 6 undergoes heat exchange with the exhaust air sucked and discharged by each exhaust fan 5, and becomes exchanged hot air.

Effects of the Invention According to this invention, the outside air supplied to each of the four burners is
By supplying exchange hot air that has undergone heat exchange in each heat exchange device 6, the temperature of the hot air generated from each burner 4 can be controlled to be lower than that when outside air is directly supplied. Therefore, the thermal efficiency of each burner 4 is improved, and the amount of fuel supplied to each burner 4 can be reduced, making it possible to save energy.

Embodiment On the ward side, the mechanism 9 of the grain dryer 8 has a rectangular shape that is long in the front and back direction and consists of front and rear wall plates and left and right wall plates, and a grain storage chamber 1 is formed in the upper part of this mechanism 9. Below this grain storage chamber 1, upper and lower drying chambers 2 formed between upper and lower ventilation mesh plates are arranged side by side and communicated with each other, and below this upper drying chamber 2, an upper drying chamber 2 is formed between ventilation mesh plates. It has a structure in which lower drying chambers 3 are arranged side by side and communicated with each other, and at the bottom of each of the lower drying chambers 3 there is rotatably supported a feed-out valve lO for feeding and flowing down the grains.
In addition, a grain collection gutter 11 with a transfer spiral rotatably supported on the lower side of each of the drying chambers 3 in the lower tier is installed and communicated with the drying chambers 2 and 3, and between the inner sides of each of the drying chambers 2 and 3 installed in parallel, hot air is distributed in two stages, upper and lower. A hot air chamber 12.13 is formed within each hot air chamber 12.13.
A hot air temperature sensor 14 is provided to detect the temperature of hot air inside the drying chamber 13, and exhaust chambers 15.
6, and each delivery valve 10 is rotationally driven by a valve motor 26 provided on the rear wall plate.

The front wall plate of the mechanism 9 is provided with an operating device 17 for starting and stopping the dryer 8, and a lower burner case housing a lower burner 4 is provided in front of the lower drying chamber 3. 18, and an upper exhaust fan 5 is installed in front of the upper drying chamber 2, and at the tip edge of the exhaust fan 5, outside air is drawn in by the cross-passage of the exhaust air discharged from the exhaust fan 5. An upper heat exchange device 6 of a heat pipe type is provided, and an exchange hot air passage 7 is provided between the lower side of the upper heat exchange apparatus 6 and the front side of the lower burner case 18 by means of an exchange hot air passage tube 19. The rear wall plate of the mechanism 9 is provided with the operating device 17 for starting and stopping the drying 418, and the rear side of the drying chamber 2 in the upper stage is provided with the operating device 17 for starting and stopping the drying 418. An upper burner case 20 in which the upper burner 4 is housed is provided, and a lower exhaust fan 5 is provided at the rear of the lower drying chamber 3, and the tip edge of the exhaust fan 5 is provided with an air exhaust fan 5. A heat-vib type lower heat exchange device 6 that exchanges heat with outside air taken in by cross-passing of the exhaust air is provided between the upper side of the lower heat exchange device 6 and the rear side of the upper burner case 20. This is a configuration in which the exchange hot air passage 7 is formed by an exchange hot air passage cylinder 19 and communicated with each other.

The hot air generated from the burner 4 in the upper stage and the exchange hot air obtained by heat-exchanging the outside air sucked into the heat exchanger 6 in the lower stage pass through the burner 4, and the passing exchange hot air is mixed and dried. This dry hot air passes through the hot air chamber 12 in the upper tier, passes through each of the drying chambers 2 in the upper tier, passes through each of the exhaust chambers 15 in the upper tier, and is sucked and exhausted by the exhaust fan 5 in the upper tier. The outside air sucked into the upper heat exchange device 6 provided at the tip edge of the upper exhaust fan 5 is heat exchanged by the discharged air, and this heat exchanged exchange hot air is transferred to the exchange hot air passage pipe on the front side. The circulation of the hot air supplied to the burner 4 on the lower stage through the exchange hot air passage 7 formed in step 19 is repeated, and the same circulation as on the upper stage is repeated on the lower stage side, and each exhaust fan 5 is configured to be rotated individually by each exhaust fan motor 25.

A fuel pump 21 having a fuel valve is provided on the outer side of the lower plate of each of the burner cases 18 and 20, and by opening and closing each fuel valve, each fuel pump 21 sucks the fuel in the fuel tank 22 and supplies it to each of the burners 4. The air blower 23 and a variable speed blower motor 24 for driving the blower 23 to rotate at variable speeds are provided on the outside of the upper plate, and the rotation of each blower motor 24 drives each blower 23 to rotate. , each blower 23 is configured to individually supply combustion air to each burner 4 in accordance with the amount of supplied fuel.

A transfer gutter 28 in which a ceiling plate 27 and a transfer spiral are rotatably supported is provided above the grain storage chamber 1, and the transfer gutter 28 supplies the transferred grains into the grain storage chamber 1 at the center thereof. A supply port is provided, and a diffusion plate 29 is provided below the supply port to uniformly diffuse and return grains into the grain storage chamber 1 by rotation.

The grain raising machine 30 is provided in the front part of the front wall plate of the mechanism 9,
Inside, a packet conveyor 31 belt is stretched between the upper and lower booths, a discharging tube 32 is provided between the upper end and the starting end of the transfer gutter 28 for communication, and a lower end and the terminal end of the grain collecting gutter 11 are provided. It has a configuration in which a supply gutter 33 is provided between the
The grain raising machine motor 34 provided on the upper part of the grain raising machine 30 passes through the packet conveyor 31 belt, the transfer spiral in the transfer gutter 28, the spreading plate 29, and the packet conveyor 31 belt into the grain collection gutter 11. The transport spiral, etc. of A moisture sensor 35 is provided to detect moisture in the crushed grains, and each part of the moisture sensor 35 is configured to be rotated by an internal moisture motor 36.

Each of the operating devices 17 has a box shape, and on the surface plate of the box there are a start switch 37 for starting the dryer 8 for each operation of loading, drying and discharging, a stop switch 38 for stopping the dryer 8, and a stop switch 38 for stopping the dryer 8. Each temperature setting switch 39 sets the temperature of the hot air generated from each burner 4 according to the operating position of the grain type and the amount of filling, the moisture setting switch 40 sets the finishing target moisture content of the grain according to the operating position, and the moisture sensor The structure includes a display window 41 and a monitor display, etc., which alternately display the grain temperature detected by the grain temperature and remaining drying time, etc., and a drying control device 42, a temperature control device 43, etc. are provided inside. ,
Each of the settings 39, 39, and 40 is of a rotary switch type, and is configured to set a predetermined value depending on the operating position.

Each of the operating devices 17 includes various displays and each switch 37.
38 and each of the settings 39, 40, etc., are configured to be processed in parallel, and when the operating device 17 on either side is operated, this operation is input and a predetermined part is activated. The drying control device 42 and the temperature control device 43 are connected to the moisture sensor 35.
And the detection value detected by each hot air temperature sensor 14 etc. is A
- Each A-D converter that performs D conversion, an input circuit into which the converted value converted by each A-D converter is input, and each switch 3
7.38 and each input circuit into which the operations of 39.40 are input, and the CP that performs these calculations and comparison calculations, etc.
The configuration includes an output circuit that outputs various commands issued by the CPU.

Hereinafter, the operation of the above embodiment will be explained.

By operating each setting switch 39, 39, and 40 of the operating device 17 to a predetermined position and operating the start switch 37 to start drying, the grain dryer 1, each part of the machine 8, and each burner 4 can be adjusted.
and moisture sensor 35 etc. are started, hot air is generated from each burner 14, and the outside air sucked into each heat exchange device 6 is heat exchanged to become exchange hot air, and this exchange hot air passes through each exchange hot air passage 7 and is then This exchanged hot air is supplied to each of the four burners, and the hot air generated from each burner 14 is mixed to become dry hot air, and this dry hot air is sent from the upper and lower hot air chambers 12.13 to each of the upper and lower drying chambers 2. 3, passes through each of the upper and lower ventilation chambers 15 and 16, and is individually sucked and exhausted by each exhaust fan 5, and this exhaust air passes through each heat exchange device 6 and is discharged by each heat exchange device 6. The outside air sucked into the burner 4 undergoes heat exchange to become exchange hot air, and the supply circulation to each burner 4 section via each exchange hot air passage 7 is repeated.

The grains stored in the grain storage chamber 1 of the dryer 8 are exposed to dry hot air while flowing down from the grain storage chamber 1 into the upper and lower drying chambers 23, and are dried. 10, the grains are fed to the lower part and flowed down to be supplied into the collecting trough 11, from this collecting trough 11, through the supply trough 33, into the grain raising machine 30 by the lower transfer spiral, and then by the packet conveyor 31 to the upper part. The grains are transported through the dispensing tube 32 and supplied into the transfer gutter 28, and from the transfer gutter 28, the grains are transferred and supplied onto the spreading plate 29 by the upper transfer spiral, and the spreading plate 29 evenly distributes the grains into the grain storage chamber 1. When the moisture sensor 35 detects the same grain moisture as the finishing target moisture set by operating the moisture setting switch 40, the drying control device 42 of the operating device 17 automatically controls the grain moisture. Then, the dryer 8 is automatically stopped to stop drying the grains.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a partially cutaway overall side view of a grain dryer, and Fig. 2 is an A of Fig. 1.
-A sectional view, and FIG. 3 is a partially cutaway front view of a part of the grain dryer. Explanation of symbols 1 Grain storage chamber 2 Drying chamber 3 Drying chamber 4 Burner 5 Exhaust fan 6 Heat exchange device 7 Exchange hot air passage

Claims (1)

[Claims] A grain storage chamber 1 is provided in the upper part, and drying chambers 2 and 3 are provided in the upper and lower stages for drying the falling grains in the lower part, and a burner 4 that generates hot air is installed on either side of the drying chamber 2 in the upper stage. An exhaust fan 5 that sucks and exhausts this hot air, and a heat exchange device 6 that exchanges heat with the outside air that is sucked in at the tip edge of the exhaust fan 5 are installed in front and rear of the drying chamber 3 in the lower stage, opposite to the upper stage. The exhaust fan 5 and the heat exchange device 6 are installed below the burner 4 in the upper stage, and the burner 4 is installed below the exhaust fan 5 and the heat exchange device 6 in the upper stage. A drying device for a grain dryer, in which an exchange hot air passage 7 is formed between a burner 4 and a heat exchange device 6 to supply exchange hot air exchanged by each heat exchange device 6 to each burner 4.