JP2864517B2 - Grain drying method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement in a method for drying cereals such as cereals such as rice and wheat.

(Prior Art) Conventionally, for example, a drying method has been adopted in which harvested harvested rice is threshed and then dried to a finished moisture value as rice. Then, the paddy dried to the finished moisture value is then polished into brown rice, which is stored or distributed in a brown rice state.

(Problems to be Solved by the Invention) However, in the conventional method of drying to the finished moisture value in a state of paddy, in addition to requiring a large amount of heat energy, the drying time is prolonged. The solution was desired.

Thus, the present invention has found that, in the process of solving this problem, drying efficiency is better if the rice is dried in brown rice rather than in paddy.

An object of the present invention is to improve the drying efficiency based on this finding and thereby reduce the heat energy consumption and the drying time, respectively.

(Means for Solving the Problems) In order to solve this object, the method of the present invention comprises the following steps, and drying is performed in the order of the steps.

(1) A raw rice drying step of drying raw rice to a predetermined moisture value.

(2) A deprocessing step of deprocessing raw rice after drying to produce brown rice.

(3) A brown rice finishing step of drying brown rice to finish moisture.

(Operation) Next, the operation of the present invention will be described.

First, in the raw rice drying step, since the moisture value of the raw rice advances to a predetermined value (for example, 22%), the rice husk, which is the skin of the raw rice, is in a dry state.

In the next deprocessing step, the raw rice is in a dry state with the rice chaff in a dry state.

Further, in the brown rice finishing step, the brown rice from which the chaff has been removed is dried to easily remove moisture, and the drying efficiency is higher than in the case of the chaff drying.

Therefore, according to the present invention, reduction of heat energy consumption and drying time required for drying as a whole can be realized.

(Example) Next, an example of a drying system for performing the drying method of the present invention will be described with reference to FIG.

As shown in FIG. 1, this drying system includes a circulation type grain dryer A for drying grains with hot air while circulating inside the machine, and a paddle released from a rotary wing impinging on a stripping plate to remove the paddy from the wind. And an impeller-type huller B for separating brown rice and chaff.

The grain dryer A has a filling hopper 1, and the paddy put into the filling hopper 1 is transported upward by an elevator 2 and is filled into a tank 3. During the drying, the grains in the tank 3 are dried by hot air while being circulated in the machine by a transport device such as the elevator 2.

A discharge port for discharging grains is provided outside the machine on the grain transport path above the grain dryer A, and an openable and closable valve 4 is provided at the discharge port, and a discharge pipe 5 is connected to the discharge port. This discharge tube 5 is movable on its discharge port side, and normally its discharge port is connected to the receiving hopper 6 of the impeller type huller B.
Look into.

Also, the grain dryer A has a brown rice storage tank 7 for storing brown rice after deprocessing supplied from the impeller type huller B.
Is attached. The outlet of the brown rice storage tank 7 is connected to the hopper 1 for insertion, and the outlet is provided with an openable and closable valve 8.

At the discharge port of the impeller-type huller B, a brown rice transport device 9 for transporting brown rice after deprocessing to the brown rice storage tank 7 is provided. Then, the discharge port of the brown rice transport device 9 is looked up at the upper opening of the brown rice storage tank 7.

Next, an example of a method for drying cereals using the drying system configured as described above will be described.

First, both the on-off valve 4 and the on-off valve 8 are closed. Next, the harvested high-moisture raw rice is put into the grain dryer A and drying is started. When the moisture value of the raw rice reaches a predetermined value, for example, 22%, the raw rice is dried once here. finish. At this time, the surface layer of the raw rice is in a dry state.

Next, the open / close valve 4 is opened, and the raw rice in the grain dryer A is received via the discharge tube 5 into the receiving hopper 6 of the impeller type huller B.
Transfer to Then, the transferred raw rice is deprocessed by the impeller type huller B to become brown rice.

The raw rice to be deprocessed here is easily deprocessed because the moisture value is standardized to a predetermined value as described above and the surface layer is in a dry state.

Moreover, the impeller-type huller B can generally deprocess even high-moisture rice at a high rate. Therefore, a high removal rate can be maintained in this removal processing.

Next, the brown rice thus de-processed is temporarily stored in a brown rice storage tank 7, and when the on-off valve 8 is opened thereafter, the brown rice is inserted into the grain dryer A and starts drying. At this time,
The brown rice to be dried is in a state where the chaff has been removed,
Moisture is easily removed and the drying efficiency is good compared to when drying the paddy.

Therefore, brown rice drying requires a shorter drying time and requires less heat energy for drying than paddy drying.

When the drying temperature is lowered and the drying is performed for a long time, the heat energy required for the drying slightly increases, but the finished quality of the brown rice is remarkably improved.

When the moisture value of the brown rice reaches the finished moisture value by such brown rice drying, the brown rice is taken out from the grain dryer A. Thereafter, the rice is stored or distributed in the market in the state of brown rice.

(Effects of the Invention) As described above, in the present invention, raw rice is dried to a predetermined moisture value to make its surface layer dry, and then, in this state, raw rice is deprocessed to brown rice, and further, brown rice is produced. Since the drying is performed to the finished moisture value in the state, the drying efficiency is improved, and the heat energy consumption and the drying time required for the drying as a whole can be reduced.

In the raw paddy drying step, the paddy, which is the skin of the raw paddy, is dried and then subjected to the draining process, so that the draining process is facilitated and the drainage rate is improved.

[Brief description of the drawings]

The drawing is a front view showing an example of a drying system for carrying out the method of the present invention. A: grain dryer, B: impeller type huller.

Claims (1)

(57) [Claims] 1. A raw rice drying step of drying raw rice to a predetermined moisture value, a dehulling treatment step of dewatering raw rice after drying to produce brown rice, and a brown rice finishing step of drying brown rice to a finish moisture A method for drying cereals, comprising the steps of: