JPS58858B2 - Easy to use - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a batch-type grain steaming apparatus that steams grains such as soybeans, rice, and wheat in a suspended state by forced convection of steam in a short period of time, and particularly relates to a batch-type grain steaming apparatus that steams grains such as soybeans, rice, and wheat in a suspended state by forced convection of steam. By using a forced convection device of The present invention relates to a batch type grain steaming apparatus for steaming grains in a short period of time by suspending the steam above the grains and spraying the steam substantially uniformly onto the surface of each grain.

The process of steaming grains is very important in the food industry, brewing industry, microbial industry, etc.

Conventionally, grain steaming devices have been either batch-type devices that simply blow steam into a pot, or continuous-type devices that send grains onto a screw conveyor using a rotary valve from below a pipe and blow steam from above. be.

However, these devices have poor heat dissipation,
The drawback was that it took a long time to steam, and the heat was not evenly distributed, resulting in a deterioration in quality.

Therefore, steaming of soybeans and other legumes using high-pressure, high-temperature (2 kg/cm2 pressure, 130°C) steam has become widely practiced, but this method oxidizes and colors the soybeans due to the high temperature, and also destroys the beans themselves. The disadvantage is that it becomes soft and easily crumbles.

Generally, when steaming grains, the moisture contained in the grains evaporates during the steaming process, creating a steam film on the surface of the grains, or the steam supplied into the steamer adheres to the surface of the grains, resulting in steam formation. (and/or moisture) films, and these films are exposed to continuously supplied steam (superheated and/or
This prevents the thermal energy of the grain (or pressurized steam) from being sufficiently conducted to each grain.

The purpose of this invention is to focus on this phenomenon, and to make grains floating by forcing convection of superheated and/or pressurized steam.
The method is to blow the steam onto one surface of the grain to break or blow away the film formed, and to sufficiently conduct the thermal energy of the continuously supplied steam to the grains, thereby steaming the grains in a short period of time. .

In addition, since the floating steaming of the present invention has extremely high thermal efficiency,
Even if the steaming temperature is high enough, around 109℃,
For this reason, it is possible to prevent discoloration due to oxidation, as is the case with high-pressure, high-temperature steaming, and it has the excellent advantage that even when completely steamed, it does not become so soft that it easily collapses.

Hereinafter, the apparatus of the present invention will be explained in detail with reference to the drawings.

Referring to FIGS. 1 and 2, which illustrate an embodiment of the present invention, a batch-type sealed pressure vessel 21 for steaming grains such as soybeans and wheat is mounted on a support 23 having a steam passage with a bearing 23 and a gasket. It is rotatably mounted via 32.

The batch-type sealed pressure vessel 21 has a grain supply port 24 in its upper part, a grain take-out port 25 in its lower part, a pressure regulating device 30 such as a steam pressure regulating valve for regulating the steam pressure inside the sealed pressure vessel 21, and a drain. It is equipped with 31.

Inside the sealed pressure vessel 21, ventilated and water-permeable porous partition members 22 are provided above and below, and overheating and/or water is removed from below.
Alternatively, a steam injection port 34 is provided below the closed pressure vessel 21 so that pressurized steam can be supplied, and a steam exhaust port 35 is provided above.

Steam passes through the heater 39, fan 26, and duct 27 from the steam supply port 28, and then is sent into the closed pressure vessel 21 from the passage in the column 23 through the steam injection port 34.

Then, the steam passes through the steam outlet 35, the passage in the column 23, the duct 27, and then passes through a passage restriction device 37, such as a throttle valve, which can adjust the steam pressure in the closed pressure vessel 21, and from the duct 27 into the atmosphere 40. or sent to be recycled again.

Whether it is discharged into the atmosphere or recirculated can be adjusted by a damper 29 pivotally mounted at position 36.

Regarding the operation of this device, first feed grain B to feed port 2.
4 onto the partition member 22 inside the sealed pressure vessel 21.

The heater 39 and fan 26 are operated to inject superheated and/or pressurized steam from the steam injection port 34 into the closed pressure vessel 21, and the grains B on the partition member 22 are brought into a floating state by forced convection of the steam.

In this case, an auxiliary forced convection device (not shown) such as a fan may be provided at least at the bottom of the closed pressure vessel 21 and also at the top if necessary.

In this steam treatment, the steam pressure inside the closed pressure vessel 21 can also be increased by adjusting the passage restriction device 37.

After the predetermined steaming process is completed, the closed pressure vessel 21 is slightly rotated and tilted to take out the steamed grains from the outlet 25.

Next, the above operation is repeated to perform the steaming treatment on the next grain.

In the figure, arrows indicate steam paths.

Reference will now be made to FIG. 3, which illustrates another embodiment of the invention.

In Fig. 3, parts that are the same as those shown in Figs.
) is attached.

Therefore, the structure and operation of the same parts will be omitted here, and only the differences will be described below.

A flexible bellows pipe 38 is provided midway between the steam supply side duct 27' and the discharge side duct 27'.

This bellows tube 38 is provided so that the batch type sealed pressure vessel 21' can rotate.

Of course, the batch-type sealed pressure vessels 21, 21' shown in FIGS. 1, 2, and 3 are equipped with handles (not shown) for appropriately rotating them.

In addition, the batch-type sealed pressure vessel 21, 21' does not necessarily need to have grain supply ports 24, 24' and take-out ports 25, 25', respectively, but a common opening (not shown) for supplying and taking out grains. Although the sealed pressure vessels 21, 21' are constructed to be rotatable in order to facilitate the removal of grains, they may also be constructed in a fixed manner.

Since the steaming apparatus of the present invention has the above-mentioned configuration, it has a very simple structure, and can evenly steam grains with steam at 90-110°C in a very short time. Therefore, the quality does not deteriorate as with high-pressure steam. do not have.

This device can be widely applied to cooking rice for school lunches, steaming grains such as soybeans as raw materials for brewing, steaming sesame seeds as raw materials for oil refinery, etc.

[Brief explanation of drawings]

FIG. 1 is a partially sectional front view of an embodiment of a batch-type grain steaming apparatus according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG. FIG. 6 shows a partially sectional front view of another embodiment. 21.21'...Batch type sealed pressure vessel, 22
゜22′・・・Porous partition member, B・・・・・・
Cereals.

Claims (1)

[Claims] 1. In a batch-type sealed pressure vessel for grain steaming, a porous partition member that allows ventilation and water permeability is arranged at least at the bottom, and superheated and/or pressurized steam is forced from below the porous partition member using a forced convection device. By forced convection, the grains are steamed in a short period of time by blowing up the steam to a state where the grains are suspended above the porous partition member and spraying the steam substantially evenly onto the surface of each grain. Batch type grain steaming equipment.