JPS60216172A - Controller for drying air in drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dryer for grains, etc., and in particular, in a large-scale down-flow dryer for drying a large amount of grain, many dryers are used to heat the drying air. Requires fluorophore,
The financial burden was heavy.

This invention takes the following technical measures to reduce the amount of fuel required for drying.

That is, in a dryer consisting of a furnace (1), a drying chamber (2) that receives drying air from the furnace (1) to dry the grains, and an exhaust duct (3) that guides the exhaust air after drying, A switching valve (5) that connects the exhaust duct (3) and the furnace (1) through a branch duct (4) and switches the direction of exhaust air at a branch part of the exhaust duct (3) and the branch duct (4). ), a temperature and humidity sensor (6) is installed in the exhaust duct (3) to detect the temperature and humidity of the exhaust air, and a temperature and humidity sensor (6) is installed in the furnace (1) to detect the temperature and humidity of the outside air. A sensor (7) is installed, and based on this detected value, the amount of heat required to heat the outside air and the exhaust air into dry air is compared, and if the exhaust air can be heated with a lower amount of heat, the switching valve (5) is installed. Activate 1 and open the exhaust duct (3
) and the furnace (1) are connected through a branch duct (4) to form a drying air control device in a dryer with a length of 1 m.

In the illustrated example, the falling dryer dries the grains while flowing them down from above, and the drying chamber (2) that allows ventilation and the tempering chamber (8) that does not allow ventilation are alternately arranged in the vertical direction. There is an outlet (9) at the bottom for taking out a certain amount of dried grains from the machine.
This is provided.

OQ is a furnace room, and inside there is a blower aυ and a furnace (1
), and the drying air generated from the furnace (1) is passed through the duct α.
Drying room (2) (2) through the seedlings and distribution duct
) is configured to allow air to be blown to.

Reference numeral 00 denotes an exhaust air collection gutter, which guides the exhaust air discharged from the drying chamber (2) to the cyclone type dust separator αQ. The exhaust duct (3) guides and discharges the exhaust air discharged from the cyclone type dust separator OQ to the outdoors.

In addition, a branch duct (4) that communicates with the furnace room a0 is installed in the middle of this exhaust duct (3), and the exhaust air is switched between the outdoors and the furnace room (1 (e) by operating the switching valve (5). The α force is the drive motor (to) of the switching valve (5).
is the rotation axis of the switching valve (5).

The α wound is the intake port of the furnace chamber θ1, and the intake port 0 is provided with an on-off valve (E) for the intake port θG and a drive motor Qυ for the on-off valve.

To explain the control circuit, the temperature and humidity sensor (6) in the exhaust duct (3) and the temperature and humidity sensor in the furnace room 00 population.
The detection value detected by (7) is converted into an electrical signal by the converter (a), and the comparison calculation circuit (2)
) is configured so that it is input to The comparison/arithmetic circuit (to) is connected to a storage memory that stores the temperature and the amount of heat required to heat the dry air according to the temperature value created by the actual measurement value, and exchanges information with each other.

After the comparison calculation circuit (c), there is an interface circuit (c),
Through the digital input/output circuit (c), each drive circuit @
(b) Connected and further connected to each drive motor switch Qυ.

While filling grains into the down-flow dryer, the furnace (1) is ignited, and the blower 0υ blows drying air through duct 03 and distribution duct (Q4) (14) to the drying room (2) to dry the grains. Dry with hot air. The grains flow down while repeating hot air drying in the drying chamber (2) and thermal drying in the tempering chamber (8), and are taken out of the machine from the lower outlet (9).

The exhaust air discharged from the drying room (2) is sent from the exhaust air collector U to the cyclone type dust separator 0Q, where dust is separated and then exhausted to the outdoors from the exhaust duct (3).

During this drying process, grains with low moisture content are stored in the drying room (2
), when the grains are dried, less water evaporates from the grains, so relatively high temperature and low humidity exhaust air is discharged from the drying room (2). The temperature and humidity of this exhaust air are detected by the temperature and humidity sensor (6) in the exhaust duct (3), and the same is sent to the comparison calculation circuit (E) via the converter (2). The temperature and humidity of the outside air near the furnace room OI entrance are detected by the temperature and humidity sensor (7) and sent to the comparison calculation circuit (to) via the converter (a).
sent to. This comparison calculation circuit (G) compares the temperature and humidity of the outside air and the exhaust air with information on the amount of heating heat corresponding to the temperature and humidity stored in the memory memory, and shows that it is better to use the exhaust air in terms of the amount of heat. If it is advantageous for At the same time, the drive motor f2D is driven to drive the on-off valve (7) in the direction of the arrow (b) to open the furnace chamber α0.
Close the air intake port 09.

In addition, if during work, the humidity in the exhaust air becomes high, etc., and a computation result is output to the comparison calculation circuit that it is more advantageous in terms of calorific value to introduce outside air than to use the exhaust air, each The drive motor @Qυ is transmitted to exhaust the exhaust air outdoors, and the furnace room α
Q is returned to the normal drying process in which outside air is sucked in.

In addition, even if the on-off valve (A) of the intake air ['00] of the furnace chamber θQ is always open and the exhaust air is only guided to the furnace chamber Q (I), the effect of using the exhaust air is almost negligible. It is achievable.

Since this invention can be configured as described above, it is advantageous to detect the temperature and humidity of outside air and the exhaust air after drying to obtain dry air, and to compare and calculate the amount of heat required to heat both air to dry air. Therefore, it is possible to make use of one of the two types of fuel, and it is possible to significantly reduce the amount of fuel used.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view, Fig. 2 is a plan view, Fig. 3 is a front sectional view of main parts, and Fig. 4 is a front view.
The figure is a block diagram. In the figure, symbol (1) is the furnace, (2) is the drying room, (3) is the exhaust duct, (4) is the branch duct, (5) is the switching valve, and (6) is the exhaust duct.
) (7) indicates a temperature/humidity sensor. Patent applicant name: Iseki Agricultural Machinery Co., Ltd. Representative: Akira Takashi Iseki Figure 1

Claims (1)

[Claims] In a dryer consisting of a furnace, a drying chamber that receives drying air from the furnace to dry grains, and an exhaust duct that guides the exhaust air after drying, the exhaust duct and the furnace are connected by a branch duct. A switching valve to switch the direction of the exhaust air is installed at the branch part of the exhaust duct and the branch duct, and a temperature and humidity sensor is installed in the exhaust duct to detect the temperature and humidity of the exhaust air.
In addition, a temperature and humidity sensor is installed at the furnace inlet to detect the temperature and humidity of the outside air, and based on this detected value, the amount of heat required to heat the outside air and exhaust air into dry air is compared, and the exhaust air is lower. A drying air control device for a dryer which operates a switching valve to communicate an exhaust duct and a furnace via a branch duct when heating is possible with the amount of heat.