JPH07106185B2 - Method and apparatus for steaming cereals - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for steaming cereals and an apparatus used therefor, for example, steaming cereals as a pretreatment for making koji seeds from cereals for sake brewing. Used for.

(Prior art) To steam a grain for the above-mentioned purpose, the grain is soaked for a predetermined time to increase the water content, and then used. When the temperature is raised to the specified temperature, moisture and heat pass well to the inside,
A good quality product with good alpha conversion is obtained.

Conventionally, in order to suppress the first heating state, heat is radiated by opening the front part of the steaming room where steam is applied to the grains being transported to the atmosphere to release heat, or the supplied steam is sprinkled to reduce the temperature. There is.

(Problems to be solved by the invention) However, it is difficult to control the influence of the outside air temperature only by opening the cooking chamber to radiate heat, and the influence of the outside temperature is caused by the upper and lower layers of cereals and the corners of the cooking chamber. Since it becomes uneven in the central part,
Can not keep the heating state in the desired temperature range or temperature unevenness,
The steaming becomes uneven. Therefore, the quality is often impaired.

In addition, the water temperature reduction method by sprinkling causes excessive water content, which also impairs quality.

Therefore, the first object of the present invention is to provide a method for steaming cereals which can solve the above-mentioned problems by performing low-temperature heating with low-temperature dry steam in the initial stage of the steaming process, and steaming advantageous for carrying out this method. A second object is to provide a device.

(Means for Solving the Problems) In order to achieve the first object of the present invention, in order to achieve the first object, low temperature dry steam is supplied in the initial stage to steam the grains and low temperature heating is performed, and then high temperature dry steam is provided. In order to achieve the above-mentioned second object, the first characteristic is to shift to high temperature heating by means of high temperature heating, and in order to achieve the second object, a low temperature having a mixer for forcibly mixing high temperature dry steam and outside air into low temperature dry steam. The second feature is that the steam supply means is provided.

(Operation) The first feature of the present invention is, at the stage of starting to steam the grains,
Since low-temperature dry steam, that is, dry steam that is lower than the normal evaporation temperature at atmospheric pressure is supplied to heat at low temperature, the specified low-temperature heating can be performed only by direct contact between the grain and the low-temperature dry steam at the predetermined temperature, and the processing unevenness Realizes low temperature heating without temperature unevenness and temperature fluctuation. Further, since the low-temperature steam is dry steam, there is no adverse effect due to excess water.

According to the second feature of the present invention, the low-temperature steam supply means reduces the temperature of the high-temperature dry steam obtained at atmospheric pressure or higher by forcibly mixing it with the outside air, so that the mixing ratio with the outside air can be adjusted. Low-temperature steam of any temperature can be obtained, the grain can be heated to a low temperature at a desired temperature, and the outside air is simply mixed into the steam, so that the steam that has been reduced in temperature remains as dry steam and steams the grain. The initial low temperature heating can be carried out successfully.

(Example) An example of the present invention will be described below with reference to the drawings. The figure shows the case of a so-called steamed rice machine used for steaming grains. In this steamed rice machine, a conveyor 2 is horizontally installed inside a body 1. The conveyor 2 is a breathable, liquid-permeable net belt.
2a is stretched, and a large number of vapor diffusion boxes 3 are provided side by side on the back side of the belt 2a, and the grains 4 on the belt 2a are heated by the vapors ejected from the boxes 3.

The grain 4 is belted through the hopper 5 at one end of the conveyor 2.
2a is supplied and is heated by the steam while being conveyed to the other end of the conveyor 2 in the direction of the arrow.

A shooter 6 for guiding the transported steamed grains 4 is provided at the transporting end portion of the conveyor 2, and is put in a receiving box 7 outside the container 1.

The process of steaming grains on the conveyor 2 is divided into several sections A, B and C, and the first section A is 100 ° C.
Hereinafter, for example, low temperature heating is performed at 90 ° C., 100 ° C. in section B and 115 ° C. in section C.

For this purpose, the low temperature vapor supply means 8 is connected to the vapor diffusion box 3 provided in the section A via a header 9 or the like, and although not shown, each vapor diffusion box 3 in the section B or section C has its own vapor diffusion box 3. A hot steam supply means for supplying hot steam suitable for the section is connected.

By the way, dry steam is used for steaming, but since high temperature dry steam of 100 ° C. or higher has been conventionally supplied, description of the high temperature steam supply means will be omitted.

The low-temperature steam supply means 8 for supplying low-temperature dry steam is provided with a mixer 12 in the middle of a heating steam conduit 11 for supplying high-temperature dry steam to a header 9, and an air conduit 14 having a blower 13 in this mixer 12. Is connected. The mixer 12 mixes the high temperature dry steam supplied to the header 9 through the heating steam pipe 11 with the outside air sucked through the filter 18 to reduce the temperature of the dry steam to a desired temperature. As a result, the low-temperature steam supply means 8 supplies the reduced-temperature low-temperature dry steam to the low-temperature heating.

This mixer 12 for mixing steam and air is a multi-stage structure in which a partition wall 15 that divides the inside of the passage into two sections is twisted between its both ends, and 90 phases are provided between adjacent end portions. It is as a static mixer arranged in.

And to obtain low temperature dry steam at the desired temperature, the air line 14
A flow rate control valve 16 is provided in the middle of this, and this flow rate control valve 16 is provided in the air pipeline 14 according to the temperature detected by the temperature sensor 17 provided in the rear of the mixer 12 of the heating steam pipeline 11, that is, on the secondary side. The air flow rate is controlled. As a result, the amount of outside air required to obtain the low temperature dry steam of the set desired temperature is accurately mixed.

The low-temperature dry steam thus obtained is uniformly blown out from below under the low-temperature heating section A through the diffusion box 3 and passes through the grains of the layer of the grains 4 passing through the section A with even contact. However, all of the grains 4 can be low-temperature-heated for a predetermined period of time in a continuous state without any temperature or treatment, and the grains can be steamed successfully by the continuous heating to the high-temperature heating in the sections B and C later.

The steam that has been used for steaming the grains is discharged from the exhaust port 19 provided in the ceiling of the container 1.

The low-temperature steam supply means 8 may be any one other than the above-mentioned embodiment as long as it can supply low-temperature dry steam at a desired temperature. Further, the body 1 and its internal structure can be variously modified.

(Effect of the invention) According to the first invention of the present invention, low temperature heating in the initial stage of steaming cereals is performed by supplying low temperature dry steam of a predetermined temperature and performing direct low temperature heating only by direct contact. In addition, ideal low temperature heating can be performed without uneven treatment, uneven temperature, and temperature fluctuations, and without being affected by excess water, so that grains can be steamed in good quality.

Further, according to the second invention, the temperature can be reduced by mixing the outside air into the normally obtained high-temperature dry steam, and the dry steam can be brought to a predetermined low temperature for use in the steaming initial step of cereals. Ideal low temperature heating can be realized easily and stably using low temperature dry steam.

[Brief description of drawings]

 FIG. 1 is a sectional view of a steamer for rice according to an embodiment of the present invention. 1 ... Instrument 4 ... Cereal 8 ... Low-temperature steam supply means 11 ... Heating steam pipeline 12 ... Mixer 13 ... Blower 14 ... Air pipeline

Claims (2)

[Claims] 1. A method of steaming cereals, characterized in that low-temperature dry steam is supplied at an initial stage of steaming the cereals to perform low-temperature heating, and then high-temperature dry steam is used for high-temperature heating to steam the cereals. 2. A cereal steaming device comprising a low temperature steam supply means having a mixer for forcibly mixing high temperature dry steam and outside air to obtain low temperature dry steam.