JPS5911150A - Method for steaming hard grain - Google Patents

Abstract

PURPOSE:To carry out the complete steaming of hard grains to absorb water uniformly even to the core parts of the hard grains, by primarily steaming the hard grains previously absorbing water with steam on an air-permeable conveyor, sprinkling the grains with water under agitation, and regularly steaming the grains with steam. CONSTITUTION:Grains having the hard property are previously subjected to the water absorption, deposited on an air-permeable conveyor 3 and transferred. In the process, steam generated from steam generating chambers (a) and (b) is fed to a layer 10 of the grains for 10-15min to carry out the primary steaming of the grains. An agitating apparatus 4 is then rotated to agitate and finely divide the grains, which are sprinkled uniformly with water from a water sprinkling nozzle 5. The sprinkled grains are kept in the state in a part (c) without generating steam for 4-10min. During the time, adhesive moisture on the grain surfaces is absorbed to the core parts thereof. The grains are then regularly steamed with steam in the same way as in the primary steaming on steam generating chambers (d)-(f) for 15-20min. Thus, a given amount of water according to the purpose of use is uniformly absorbed even to the core parts of the hard grains and carry out the complete steaming.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for completely steaming hard grains that are difficult to absorb water by uniformly absorbing water down to the core.

Conventionally, the properties of hard grains vary depending on the type of grain, production area, storage period, etc., and a single soaking treatment cannot absorb water evenly to the core of the grain, and after soaking, water cannot be evenly absorbed.
It was customary to perform a second steaming, then soak or sprinkle water to absorb water to the core of the grain, and then go through the steaming process again to steam the grain to the core. However, by such means ('i.

In the water sprinkling and water absorption process, water absorption is not well planned and uniform (
Also, since the amount of water applied varies depending on the type, condition, and purpose of use of the grain, it is technically difficult to uniformly give the grain additional moisture for the purpose of use, that is, adjust the amount of supplementary water, by soaking and watering. there were.

This invention eliminates the above-mentioned drawbacks, and theoretically allows the core of hard grains to uniformly absorb a predetermined amount of water depending on the purpose of use. This is a method of treating lice. - Target objects as hard grains in the method of this invention include old rice, foreign rice, barley, and other hard grains, but in Komata, hard rice as a raw material for miso will be used as an example for explanation. Old rice or foreign rice differs depending on the type and region of production, but because it has properties as hard rice, it has poor water absorption. To process these hard rice (hereinafter simply referred to as grains), the grains are soaked in advance and subjected to a specified water absorption treatment, but the water absorption rate in this process is 23~
The moisture content is 24%, and even if this moisture is subjected to the main steaming process, the moisture content will not meet the purpose of use. In this invention, grains that have been treated with water absorption in advance are piled up on a conveyor with air permeability, and a new steam such as a grain layer is heated, or a steam heating machine is used to heat the grains to an appropriate temperature and moisture for steaming. It is supplied and brought into contact with the grains, and through mutual heat exchange, it is absorbed into the steamed rice as well as drained, and the temperature of the steamed rice increases by -1-. Although it varies depending on the thickness of the deposit, the steam reaches a state where it is easy to absorb water through the deposited layer in the atrium after 10 to 15 minutes.

Water is sprinkled here, but even if water is supplied in the relative ratio between the amount of grains and the water shortage, the upper part of the sedimentary layer, The water absorption of each particle in the middle and bottom becomes uneven, so-called uniformity.
Steaming is impossible. Therefore, in order to achieve uniform water absorption, the grain layer is subdivided by stirring, and liquid or water is uniformly sprinkled on the steamed grains depending on the quality of the grains and the purpose of use. The particles are left in the same state for IO minutes to gradually absorb the moisture that adheres to the surface of the particles and evenly absorb water to the core, thereby completing the water absorption process. Average
After water absorption is completed, steam is supplied again for 15 to 20 minutes in the same way as in the primary steaming, and steaming is performed to uniformize the steamed moisture to the target moisture content. In the example, steaming is carried out once, the lack of moisture is uniformly absorbed,
Since the main steaming process is configured to be continuous steaming, it is possible to theoretically and continuously perform the conventional steaming, soaking (water sprinkling), and intermittent main steaming of grains. Moreover, it can make a significant contribution to quality improvement, labor saving, and energy saving.

The above-mentioned amount of water to be sprinkled is adjusted depending on the purpose of steaming, the quality of the grain, etc., but basically the amount of water to be sprinkled is calculated using the following formula.

Amount of water sprayed/hourly = Moisture after steaming - (Soaked water 10 Steamed 4 Moisture absorbed during heating) 10 Amount of raw grain processed/hourly x 2 The amount of water sprinkled and the grains are made uniform at a constant ratio.

The above explanation was given as an example for grains used as raw materials for miso, but this treatment method can also be used to treat old rice, foreign rice, barley, etc. that cannot absorb enough water in one soaking process, that is, require replenishment of insufficient moisture. It has a great effect on steaming and steaming depending on the purpose of use, such as for brewing or for cooking rice.For example, the moisture content can be adjusted to 37-40% for making koji, 50-60% for rice, etc. Can be adjusted.

As the apparatus for carrying out the above-mentioned steaming method, various steaming apparatuses including a punching plate having air permeability, a net conveyor, etc. can be considered.

What is shown in the drawing is one embodiment constructed by a net conveyor, and in the drawing, 1. 2 is a rotating drum provided in the main body, and 2' is a driving device. 3 is a net conveyor wound around a rotating drum, and a stirring device 4 and a water sprinkling nozzle 5 are provided on the conveyor 3.
Flow rate side 6, regulated by pulp 6' 11, a, b
.

d, e, l are steam generation chambers installed in contact with the lower part of the net conveyor, and valves a' l b' + d', e
'.

It is adjusted by r'. C is a step of absorbing water uniformly sprayed by the stirring device 4 and the nozzle 5. Further, the steam sucked in by the exhaust fan 7 is supplied to the front stage side via a steam heater 8 heated by another heat source. The heat source is adjusted by valve 8'.

In addition, 9 is a hopper, 10 is a steaming material, 11 is an exhaust fan, 1
2 is a steam shielding plate, and 13 is an outlet.

In the above configuration, when the soaked and water-absorbed grains are put into the hopper 9, the net conveyor 3 driven by the drive device 2'
It is deposited on top to a constant thickness and transported in the direction of the outlet 13. A steam generation chamber a is provided below the net conveyor 3 during transportation.

Receiving the steam generated from b, the steam contacts the grains and becomes drain through mutual heat exchange, is absorbed by the steamed rice, and the temperature of the steamed rice rises gradually, and it takes 10 to 15 minutes to pass through the steam chambers a and b. It blows through the sedimentary layer. Cereals reach a temperature of about 100°C and are in a state where they are most likely to absorb water. Water is sprinkled and absorbed in the komata, but since the steamed rice is in a coagulated state, even if water is supplied in the relative ratio of the grain to the water shortage, the water absorption of each particle in the upper, middle, and lower part of the sedimentary layer is insufficient. In order to achieve uniformity, the agitator 4 is rotated to give a stirring action to the particles, which are then uniformly sprinkled with water by the water sprinkling nozzle 5, and the state is maintained for 4 to 10 minutes at 0 parts without steam generation, during which time the particles are Absorb moisture on the surface to the core. In this case, the amount of water to be supplied is calculated from the above formula depending on the type of grain and the desired moisture content after steaming, and the amount of water to be supplied is determined each time. , valve 6', etc. Thereafter, the grains that have uniformly absorbed water to the core are steamed while being conveyed over the steam generation chamber dlC1f for 15 to 20 minutes, and when they reach the outlet 13, they have been steamed to the desired moisture content.

Steamed again? In the past, surplus steam supplied to the steamer during evening work was normally discharged outside the machine, but the surplus steam still contains a large amount of heat and serves as a strong heat source for steaming. Surplus steam in the latter stages of steaming work is still 95%
The steam has a temperature of ~97°C, and a steam heater 8 is installed in the process of the inlet pipe to suck this steam with the exhaust fan 7 and supply it to the front stage lid + r1 operation, and to use other heat sources to create the optimal steam for the front stage steaming. The temperature is adjusted (adjusted with pulp 8') and supplied.

Since the difference between the surplus steam and the target temperature is 5 to 8 degrees Celsius, the amount of steam to be heated and adjusted is very small, and compared to supplying new steam from the beginning, it is a beneficial and useful method that can save much energy. . As described above, the steam supplied to the previous stage serves as a vaporizer, is sucked into the exhaust fan 11, and is discharged outside the machine.

Note that fresh steam is supplied from A and B, and water spraying liquid or fresh water is supplied from C.

[Brief explanation of drawings]

The accompanying drawing is a top view of an apparatus suitable for carrying out the method of the invention. In addition, in the figure 1 Steaming device body 2 Rotating drum 2' Drive device 3 Net conveyor 4 Stirring bag R8 Water spray nozzle 6 Flow meter 6' Valve 7 Exhaust fan 8 Steam heater 9 Hopper
]0 Steaming materials +I Exhaust fan 1
2 blocking plate 13 exit. Patent applicant Nagata Brewing Machinery Co., Ltd.

Claims (1)

[Claims] Grains having hard properties are subjected to water absorption treatment in advance and deposited on an air permeable carrier, and during transfer, steam or regenerated steam from a steam heater is applied to the deposited grain layer for 10 minutes.
First steaming is carried out by supplying the grains for ~15 minutes, then stirring and sprinkling a predetermined amount of liquid on the grains, allowing 4 to 10 minutes to pass, allowing water to be evenly absorbed, and then steaming again for 15 to 2 minutes in the same manner as in the primary steaming.
A method for steaming hard grains, characterized in that main steaming is performed by supplying the grains for 0 minutes.