JPS59159750A - Conditioning apparatus for cooling polished rice - Google Patents

Abstract

PURPOSE:To enable the sure production of a high-quality polished rice of normal temperature in a mass, by using a conditioner for polished rice furnished with an air-cooling device and an air-humidifying device to cool the polished rice quickly by supplying the polished rice with chilled and humid air having lower temperature than the polished rice to be conditioned and high humidity than the equillibrium humidity to the moisture in the polished rice. CONSTITUTION:The polished rice conditioner 1 which is a screen-type conditioner having grain paths 4 constructed of perforated side walls 3, 3 is furnished with an air- cooling device 20 and an air-humidifying device 21 to cool the polished rice quickly by supplying the polished rice with chilled and humid air having lower temperature than the polished rice to be conditioned and higher humidity than the equilibrium humidity to the moisture in the polished rice. The air-humidifying device 21 is provided with a humidity controlling device 25 to measure the humidity of the exhausted chilled and humid air and control the humidity of the device 21 continuously by the measured value. The polished rice supplied to the conditioner 1 can be cooled to a prescribed temperature while keeping the water-content to the level equilibrium to a specific humidity. Accordingly, a large amount of polished rice of normal temperature free from cracks caused by rapid cooling and having high quality can be prepared surely, in a short time.

Description

[Detailed description of the invention] The present invention relates to an improvement in a tempering device for cooling polished rice.

In the milling process, where rice passes through the mill multiple times to be polished, the temperature of the grain increases several degrees each time it passes through the mill, drying the rice grains. In particular, in the milling of sake-brewing rice, milling is performed continuously until the yield rate is extremely low, which increases the generation of heat and increases the dryness of the rice grains, resulting in poor milling efficiency. The load fluctuates, causing cracked rice or cracked grains due to drying. Therefore, it has been conventionally practiced to cool down the increased grain temperature by interposing a cooling device in the grain circulation process of rice milling, but the heat removal results are sufficiently satisfactory with the short cooling process of the circulation process. However, after milling, the sake brewed rice is stored in large grain tanks, etc., and in order to avoid cracking of the rice grains due to sudden rotation, a long cooling effect using natural heat dissipation is carried out, dividing the grain into two grades and by region of origin. This method requires a tank, etc., and has drawbacks such as an increase in equipment area, building, etc., and an increase in equipment costs.

The present invention is aimed at solving the above-mentioned drawbacks.If grains are rapidly cooled in a grain tank storing polished rice, the surface of the grains may cool rapidly and cause crack damage. It is necessary to prevent the grain surface from drying out by applying cold and moist air to the cooled white rice at a humidity higher than that which is in equilibrium with the water content of the white rice.

Trowel The present invention provides an air cooling device and an air humidifying device for rapidly cooling polished rice by supplying cold and humid air to a polished rice tempering device at a temperature lower than that of the polished rice to be tempered and with a humidity higher than that balanced with the water content of the polished rice. By providing the milled rice tempering device, the milled rice supplied to the milled rice tempering device is cooled to a predetermined grain temperature while maintaining the equilibrium moisture content at a specific humidity, thereby eliminating the use of grain tanks etc. due to natural heat dissipation, and The purpose of the present invention is to develop and provide a high-performance device that can reliably and quickly mass-produce high-quality room-temperature milled rice without cracking and damage caused by the aforementioned rapid cooling.

The present invention will be explained with reference to embodiment figures. Reference numeral 1 denotes a polished rice tempering device, in which inside the tempering chamber 2 of the tempering device 1, a plurality of cooling grain channels 4 having porous walls 3 on both sides are arranged in parallel at appropriate intervals. A plurality of ventilation chambers 7 are arranged between each of the grain flow paths 3 and communicated with the air supply chamber 5 and the ventilation chamber 6 provided on both outer walls of the tempering chamber 2, respectively. , each grain channel 4
... is provided with an upper grain layer section 8 forming a grain layer serving as a canopy to prevent air leakage, and a discharge valve 10 of a rotary blade wheel is pivoted to a discharge port section 9 provided at the lower part of the upper grain layer section 8. Discharge valve 10
A grain circulation path 14 is integrally formed so that the grains flowing down from the bottom are returned to the upper grain layer 8, and 15 is the circulation path 1.
4 is a discharge switching valve, and 16 is a supply hopper provided at the bottom of the elevator 13. Further, the air supply chamber 5 is connected to an air cooling device 20 consisting of a cooler 18 and a blower 19 via a blower pipe 17, and a humidifier is connected to the cooling device 20 via an advancing pipe 22 of an air cooling device 21. It is connected to the container 23.

Further, the ventilation chamber 6 is provided with a humidity sensor 24 on its wall, and the sensor 24 is connected to the air humidification device 21 via a humidity adjustment device 25, so that the humidity sensor 24 discharges cold and humid air. Humidity control device 25 that measures wind humidity
Humidity control device 25 which inputs into
The grains (polished rice) in the grain flow path 4 are controlled by the control signal of
The humidity control device 26 is configured to supply cold and humid air with a humidity higher than that which is balanced in the relationship between moisture adsorption and dehumidification.
This is the exhaust air humidity setting device installed at 5.

In the above configuration, the milled rice whose grain temperature has increased due to the milling action is fried and supplied to the tempering chamber 2 of the milled rice tempering device 1 via the elevator 13, and the exhaust air humidity setting of the humidity controller 25 is performed. Select and set an arbitrary humidity setting value higher than the minimum humidity described later in the air supply chamber 5 by starting the air cooling device 20 and the air humidifying device 21 to generate an arbitrary predetermined cold and humid air. and cools the polished rice in the polished rice tempering device 1.

According to an experimental example, when brewed rice reaches a grain temperature of 31°C through milling, the rice grains are heated at a rice grain flow rate of 1 in the milled rice tempering device.
For 4 tons per hour, the equilibrium moisture content of rice grains in Figure 4 is 15
At a relative humidity of 63% or higher, which corresponds to
It can be cooled to crack-free rice grains at ℃. In addition, in order to cool sake-brewed rice with a general equilibrium moisture content of about 10% to 15% without inducing evaporation of the moisture contained in the rice grains, the exhaust humidity of the cold humid air must be at least 40% to 70%. The humidity of the cold and humid air must be maintained, and is calculated by a specific relational formula that is directly proportional to the temperature of the rice grains and the layer thickness of the grain channel, and inversely proportional to the air volume used, and the humidity of the polished rice and adsorption.・An arbitrary humidity is selected that is higher than the equilibrium humidity in relation to dehumidification, and the temperature of the cold and humid air is usually set at a temperature difference of about 5°C to 40°C with respect to the grain temperature, and the progress of the grain cooling effect. The temperature difference may be corrected in several stages depending on the situation.

Therefore, in the process where the polished rice is subjected to a circulating cooling effect, the humidity sensor 24 provided in the ventilation chamber 6 measures the humidity of the exhaust air and inputs it to the humidity adjustment device 25, and the humidity adjustment device 25 The setting value of the setting device 26 and the input value are compared, and the humidity and air volume of the humid air generated from the air humidifier @ 25 are controlled and corrected based on the comparison signal, so that the moisture and moisture absorption of the polished rice to be tempered are always maintained. It maintains a predetermined humidity that is balanced in relation to dehumidification, prevents the evaporation of moisture contained in the rice grains, and prevents cracking of the rice grains, cools the polished rice reliably and rapidly and evenly, and takes it out of the machine. You can leave it to the next step.

Claim (3) provides that the refining device:
Since it is equipped with a baffle type tempering chamber 2A with a zigzag grain flow path, compared to a screen type tempering chamber (see Fig. 1) in which both side walls of the grain flow path are porous walls, The rice grains in the flow path are turned over while flowing down, and the entire surface of the grains is uniformly exposed to cold and moist air, thereby preventing uneven cooling on the surface of the rice grains and ensuring high-quality, properly temperature-polished rice.

Claim (4) provides that the refining device includes:
Since the grain circulation process is equipped with an exhaust air switching valve in which the same white rice is circulated through the conditioning chamber multiple times, the white rice flowing down at a constant velocity is cooled uniformly in the process of the grain circulation process. This has the effect of conditioning the entire amount of white rice to a uniform grain temperature.

Claim (6) provides a picture-style device 27 in which the air cooling device supplies outside air at a lower temperature than the tempered white rice.
Therefore, compared to the cooling device described above, the structure is simpler and the manufacturing cost can be lowered.

As described above, the tempering device for cooling milled rice of the present invention eliminates the need for a grain tank due to the natural heat radiation described above, and can significantly reduce equipment costs. This is achieved by achieving the following effects, such as the ability to reliably and quickly mass-produce high-quality milled rice at a suitable temperature without cracking of the rice grains due to rapid cooling.

[Brief explanation of the drawing]

The drawings are illustrations of embodiments of the present invention. Figure 1 shows the first part of this device.
FIG. 2 is a partially cutaway side view of the embodiment; FIG. 2 is a plan cross-sectional view of the main parts; FIG. 3 is a partially cutaway side view of the third embodiment of the device; FIG. 4 is the equilibrium moisture content of rice grains. It is a relationship diagram between and relative humidity. 1... Polished rice tempering device 2... Tempering chamber 2A...
Baffle type tempering chamber 3... Porous wall 4... Grain channel for cooling 5... Air supply chamber 6... Ventilation chamber
7... Ventilation chamber 8... Upper grain layer part 9... Discharge port part 10... Discharge valve 11... Grain flow tank 1
2...Screw conveyor 13...Elevator 14.
...Grain circulation process 15...Discharge switching valve 16...
・Supply hopper 17...Air pipe 18...Cooler 19...Blow J! IA machine 20... Air cooling device 21... Air humidifying device 22... Advance pipe
23... Humidifier 24... Humidity sensor 2
5...Humidity adjustment device 26...Exhaust air humidity setting device 27
... Air supply device patent applicant Figure 2 (ZJJ

Claims (5)

[Claims] (1) The milled rice tempering device is equipped with an air cooling device and an air humidifying device that rapidly cool the polished rice by supplying cold and moist air at a temperature lower than that of the polished rice to be tempered and with a humidity higher than the moisture content of the polished rice. Tempering equipment for cooling polished rice. (2) The conditioning device for cooling polished rice according to claim (1), wherein the conditioning device is provided with a screen-type conditioning chamber in which both side walls of the grain passage are made of porous walls. quality equipment. (3) The cooling tempering device for polished rice according to claim (1), wherein the tempering device is provided with a baffle-type tempering chamber in which the grain flow path is shaped like a zigzag. (4) The tempering device is provided with a grain circulation process equipped with a discharge switching valve that circulates the same polished rice through the tempering chamber multiple times. ) or (3), the tempering device for cooling polished rice. (5) The air humidifying device is provided with a humidity adjusting device that measures the exhaust air humidity of the cold and humid air and adjusts and corrects the humidifying device in accordance with the measured value.
A tempering device for cooling polished rice according to paragraph 1) or paragraph (9) or paragraph (3). A tempering device for cooling polished rice according to claim (1).