JP6615025B2 - Vegetable oil cake manufacturing method, vegetable oil cake manufacturing apparatus, and vegetable oil cake manufacturing management system - Google Patents

Description

  The present invention relates to a method for producing vegetable oil cake, a vegetable oil cake producing device, and a vegetable oil cake production management system.

  Vegetable oil cake obtained as a by-product in the production process of vegetable oil is used for applications such as feed, fertilizer, or food materials.

  As a method for producing this vegetable oil cake, a solvent removal process for removing the extracted rice cake obtained by extracting the oil with a solvent, a drying process (water content 15 to 20%) for heating to 80 to 90 ° C. for the purpose of reducing moisture, A cooling step of cooling to 30 to 40 ° C. using a meal cooler or the like, a sizing step is performed for the purpose of uniforming the particle diameter, and the obtained vegetable oil cake is stored or filled. In the process after the cooling process, if the amount of water is large, condensation occurs and bacteria are generated, resulting in a problem of impairing product quality. In particular, the vegetable oil cake immediately after the cooling step has a high product temperature and easily generates water vapor, so that it is easy to condense.

  For this reason, a proposal has been made to devise a transporting device such as a conveyor so that condensation does not occur in the transporting device due to a temperature difference between indoor and outdoor (Patent Document 1).

JP2015-127253A

  However, in the case of a vegetable oil jar that tends to generate water vapor such as a large amount of water or a high temperature of the vegetable oil jar, there has been a problem of dew condensation even indoors where the temperature is higher than the outside air. In order to solve these condensations, it is necessary to reduce the amount of water, but in order to reduce the moisture, it is necessary to perform excessive heating in the drying process. In addition, although the method of changing the conditions of a drying process while measuring the moisture content of a vegetable oil cake is also considered, the moisture content measurement (for example, drying loss) of a vegetable oil cake takes time, and it is reflected in immediate production conditions. was difficult.

  Accordingly, an object of the present invention is to manage a dew point temperature after the cooling step in a vegetable oil syrup manufacturing process, a method for producing a vegetable oil candy that suppresses condensation in the vegetable oil syrup manufacturing process, a vegetable oil syrup manufacturing apparatus, and a vegetable oil syrup production management Is to provide a system.

  In order to achieve the above object, the present invention provides the following [1] to [9].

[1] In a method for producing vegetable oil pods including a drying step and a cooling step, the dew point temperature and temperature of any space through which the vegetable oil candy passes within 15 minutes after the cooling step outlet is measured, However, the drying and / or cooling process is controlled so that the temperature is 1 ° C. or more lower than the temperature. [2] The dew point temperature is 2 ° C. or more lower than the temperature. [1] The method for producing vegetable oil candy according to [1].
[3] The method for producing a vegetable oil koji according to [1] or [2], wherein the dew point temperature is controlled so as not to be lower than the temperature by 15 ° C. or more.
[4] The method for producing a vegetable oil pod according to any one of [1] to [3], wherein the dew point temperature and the temperature are a dew point temperature and a temperature of a cooling process outlet or a space of a transport device connected to the cooling process outlet. .
[5] The method for producing a vegetable oil koji according to any one of [1] to [4], wherein the process for controlling the drying process is to increase an exhaust amount of the drying process.
[6] The method for producing a vegetable oil cake according to any one of [1] to [5], wherein the method for producing a vegetable oil cake undergoes a solvent removal process, a drying process, a cooling process, and a granulation process.
[7] A plant with a dew point thermometer and a thermometer, or a hygrometer and a thermometer, so that any space in the device through which the vegetable oil can pass within 15 minutes after the meal cooler exit can be measured. Oil pod production device [8] A dew point thermometer and thermometer, or a hygrometer so that the dew point temperature and temperature of any space of the plant oil culm can be measured within 15 minutes after the meal cooler exit from the meal cooler exit A thermometer is installed and electrically connected to the control device of the meal dryer and / or the meal cooler, respectively, so that the dew point temperature of the space is 1 ° C. or more lower than the temperature of the thermometer of the space. A vegetable oil production control system [9] which increases the displacement and / or increases the heating temperature of the meal dryer and / or increases the air volume of the meal cooler [9] Reduce the exhaust amount of the meal dryer and / or lower the heating temperature of the meal dryer and / or reduce the air flow of the meal cooler so that the dew point temperature of the space does not become 15 ° C. lower than the temperature of the thermometer of the space. Reduced [8] vegetable oil production control system

  According to the present invention, it is possible to provide a method for producing vegetable oil cake that can be used for feed, fertilizer, or food without causing problems in the hygiene of the vegetable oil cake product by suppressing condensation in the production process of the vegetable oil cake. it can.

[Method for producing vegetable oil cake]
The method for producing vegetable oil lees according to the embodiment of the present invention includes a drying step and a cooling step, and the dew point temperature and temperature of any space where the vegetable oil lees pass within 15 minutes after the cooling step exit from the cooling step exit. It measures and the drying process and / or the cooling process are controlled so that the dew point temperature is 1 ° C. or more lower than the temperature. Hereinafter, the manufacturing process of vegetable oil cake is demonstrated in order.

  Oil raw materials (extracted raw materials) that have undergone pretreatment such as fine selection, coarse crushing, drying, heating, and pressing are separated into oil and vegetable oil lees in the pressing step and / or solvent extraction step. The solvent can be used using an organic solvent such as hexane, acetone, ethanol, etc., but hexane is generally used in Japan. Oil raw materials (extracted raw materials) are not particularly limited, but soybeans, rapeseed, corn, cottonseed, safflower, sunflower, peanuts, sesame, flaxseed, rice bran, grape seeds, etc. can be used. Or it is preferable to use rapeseed.

  Since the vegetable oil lees generated in the solvent extraction step contain a solvent, the solvent is removed by heating. The solvent removal step is carried out by addition of water, heating, or heating, and protein denaturation occurs in addition to solvent removal of oil cake. For the solvent removal step, for example, an apparatus called a desolventizer toaster can be used. In the desolventizer / toaster, the solvent removal step is preferably carried out under water and heating conditions, and is preferably carried out in a tower (within the treatment apparatus) that is made into a steam atmosphere by heating. The humidity is preferably 30 to 100%, more preferably 50 to 100%, and still more preferably 80 to 100%. The temperature is preferably 50 to 130 ° C, more preferably 80 to 120 ° C, and still more preferably 90 to 110 ° C. In addition, it is preferable to add 5-20 mass% with respect to vegetable oil cake.

  In addition, in order to adjust the quality, such as the oil content, of the product of vegetable oil cake, fat and oil produced in the oil and fat refining process can be added to the vegetable oil meal, but it is preferable to add in the solvent removal process.

  Since vegetable oil cake contains moisture, it is heated and dried in a drying process. The purpose of the drying step is to reduce the water content in the vegetable oil lees and is performed after the pressing step and the solvent removal step, but may be performed simultaneously with the solvent removal step. The apparatus used in the drying step may be any apparatus that can be used as a meal dryer, such as a rotary dryer. In addition, a drying process is performed so that the moisture content of the vegetable oil cake after a drying process may be 15-20 mass%. Conditions for the drying process include heating temperature and exhaust volume. If the heating temperature is high, the amount of water in the vegetable oil cake can be reduced more, but the temperature of the vegetable oil cake becomes high and the burden on the next cooling process is increased. Will increase. Therefore, the product temperature of the vegetable oil cake during the drying process is preferably 70 to 100 ° C, more preferably 80 to 90 ° C. On the other hand, if the exhaust amount is increased in the drying process, the amount of water in the vegetable oil cake is further reduced, and the product temperature of the vegetable oil cake is also lowered, so that the heating amount may be increased.

  The oil cake that has undergone the drying process is cooled using a meal cooler or the like. In the cooling step, for example, the oil can be dropped in an air stream, or gas can be blown onto the oil can. Increasing the air volume in the cooling step can lower the temperature of the vegetable oil cake, but the vegetable oil cake powder is easily blown off by the wind pressure. The oil cake that has undergone the cooling process becomes a product by adjusting the particle diameter in the granulation process.

  In the present invention, the dew point temperature and temperature of any space where the vegetable oil cake passes within 15 minutes after the cooling process outlet is measured from the cooling process outlet.

  The temperature is measured directly with a thermometer, but a metal thermometer using a bimetal for the sensitive part, an electric thermometer that detects changes in electrical resistance due to the temperature of platinum, etc. An electric thermometer or the like can be used. An electric thermometer is preferable in that it is electrically connected to a control device for a heating process or a cooling process. In addition, an electric thermometer that detects a change in electric resistance is more preferable in terms of durability and accuracy.

  The dew point temperature can be measured directly with a dew point thermometer, or the temperature and relative humidity are measured to determine the water vapor pressure (water vapor partial pressure in humid air), and the temperature at which the water vapor pressure is the saturated water vapor pressure is determined. Can be obtained. The calculation formula of the dew point temperature may be calculated automatically using a computer or the like, or may be approximately calculated using a saturated water vapor pressure table of JIS Z 8806 “Humidity-Measurement Method”. As the dew point thermometer, a polymer capacitive sensor, an aluminum oxide capacitive sensor, a mirror sensor, or the like can be used.

  When the dew point temperature is calculated from the temperature and the relative humidity, the relative humidity is measured using a thermometer and a hygrometer to calculate the dew point temperature. The thermometer described above may be used as the thermometer. As the hygrometer, a wet and dry bulb type hygrometer, a ventilated dry and wet bulb hygrometer, and an electronic hygrometer can be used, but an electronic hygrometer that detects a change in electrical resistance is more preferable in terms of durability and accuracy. As an electronic hygrometer, an electric resistance type, a capacitance type, or the like can be used.

  In the present invention, a dew point thermometer and a thermometer, or a hygrometer and a thermometer are installed so that the dew point temperature and temperature of any space through which the vegetable oil can pass within 15 minutes after the cooling process outlet can be measured. Install. The dew point thermometer and thermometer, or the hygrometer and thermometer may be installed in any space where the vegetable oil tank passes within 15 minutes after the cooling process exit, and within 5 minutes from the cooling exit. It is preferable to install in a space where oil syrup passes, and it is more preferable to install in a space where vegetable oil syrup passes within 2 minutes. More preferably, it installs in the conveyance apparatus after a cooling process exit or a cooling exit. When installing in a conveying apparatus, the conveying apparatus immediately after a cooling process exit is preferable. The transport device preferably has a cover to prevent dust from entering, and in that case, a dew point thermometer or a thermometer is installed in the cover or at the entrance / exit of the transport device. In addition, a conveyor can be used for a conveying apparatus. Moreover, although a dew point thermometer and a thermometer may be installed in the same place or in different places, it is more preferable that the dew point thermometer and the thermometer are installed in this order from the upstream side of the process. A plurality of dew point thermometers and thermometers or hygrometers and thermometers may be installed and appropriately selected and used. When the dew point temperature is calculated from a thermometer and a hygrometer, it is more preferable that the thermometer for measuring the dew point temperature and the thermometer for measuring the temperature are the same.

In the present invention, the drying step and / or the cooling step are controlled so that the dew point temperature obtained from the above dew point thermometer is 1 ° C. or more lower than the temperature obtained from the thermometer.
The greater the difference between the dew point temperature and the temperature, the lower the risk of condensation. Therefore, it is more preferable to control the dew point temperature to be 2 ° C lower than the temperature, and the dew point temperature is more than the temperature. More preferably, the temperature is controlled to be 3 ° C. or lower. In addition, since the dew point temperature is unnecessarily lowered, excessive heating and air blowing are performed, which causes an increase in energy costs in the manufacturing process. Therefore, it is preferable to control the dew point temperature not to be lower by 15 ° C. or more than the temperature. More preferably, it is controlled so as not to be lowered by 10 ° C. or more, more preferably 6 ° C. or more.

  In the present invention, the dew point temperature is controlled to be lower than the temperature by a certain temperature or more, but when the same standard cannot be achieved, the conditions of the drying step and / or the cooling step are changed to lower the dew point temperature. . Examples of methods for lowering the dew point temperature include increasing the heating temperature in the drying step, increasing the exhaust amount in the drying step, increasing the air volume in the cooling step, etc. Even if one or more of these methods are used simultaneously Although it is good, it is preferable to increase the exhaust amount in the drying step because the conditions can be changed immediately. Moreover, since the exhaust amount of the drying process is increased, when the heating temperature of the vegetable oil pod is insufficient, it is more preferable to increase the heating temperature at the same time.

[Vegetable oil candy production equipment]
In the present invention, the vegetable oil syrup production apparatus is characterized by installing a dew point thermometer and a thermometer so that any space of the device through which the vegetable oil syrup passes can be measured within 15 minutes after the meal cooler exit from the meal cooler exit. And The installation conditions of the thermometer, dew point thermometer, and hygrometer are as described above.

[Vegetable oil cake production management system]
In the present invention, the vegetable oil syrup production management system has a dew point thermometer and a thermometer installed so as to be able to measure any space of the device through which the vegetable oil syrup passes within 15 minutes from the outlet of the meal cooler. Each is electrically connected to the control device of the meal dryer and / or the meal cooler, and the exhaust amount of the meal dryer is increased so that the dew point temperature of the dew point thermometer is 1 ° C. or more lower than the temperature of the thermometer of the equipment. And / or increasing the heating temperature of the meal dryer and / or increasing the air volume of the meal cooler. The solvent removal step and / or the drying step are not essential steps, but preferably include a drying step. The installation conditions and operating conditions of the plant oil production management system are as described above.

EXAMPLES Next, although an Example demonstrates this invention, this invention is not restrict | limited at all by these Examples.

[Comparative Example 1]
The rapeseed meal passed through the meal dryer was cooled with a meal cooler (intake fan 15 Hz). When the temperature in the covered conveyor installed at the outlet of the meal cooler was measured, it was about 15-22 ° C. In some cases, condensation was observed in the conveyor.

[Example 1]
A thermometer (temperature measuring resistance zone 1NRZS2 manufactured by Chino Co., Ltd.) and a hygrometer (hygrometer HN-CDA manufactured by Chino Co., Ltd.) are installed on the covered conveyor installed at the outlet of the meal cooler. Was wired to a computing unit (Chinow Co., Ltd. humidity computing unit HN-GV1F), and further wired from the computing unit to the control panel of the cooling process. The temperature and dew point temperature were displayed on the control panel of the cooling process, and when the value obtained by subtracting the dew point temperature from the temperature was less than 3 ° C, the rotational speed of the intake fan of the meal cooler was increased and the discharge amount of the meal cooler was reduced. When the value obtained by subtracting the dew point temperature from the temperature was 6 ° C. or higher, the rotational speed of the intake fan of the meal cooler was decreased, and the temperature and the dew point temperature were measured electrically over time.

  As described above, when the difference between the temperature and the dew point temperature decreased, the amount of exhaust was increased by increasing the number of revolutions of the intake fan from 15 Hz to 25 Hz, and the difference between the temperature and the dew point temperature could be widened. As a result, the risk of condensation could be reduced. In addition, at 1:00 when the difference between the temperature and the dew point temperature widened, by reducing the rotational speed of the intake fan from 25 Hz to 15 Hz, the exhaust amount was reduced and the energy cost was reduced. Also, no condensation was observed.

Claims (9)

In the method for producing vegetable oil cake including the drying step and the cooling step, the dew point temperature and temperature of any space where the vegetable oil cake passes within 15 minutes after the cooling step exit from the cooling step exit,
Controlling the drying step and / or the cooling step so that the dew point temperature is 1 ° C. or more lower than the temperature;
A method for producing a vegetable oil koji characterized by the above.   The method for producing a vegetable oil koji according to claim 1, wherein the dew point temperature is controlled to be 2 ° C. or more lower than the temperature.   The method according to claim 1 or 2, wherein the dew point temperature is controlled not to be lower than the temperature by 15 ° C or more.   The plant according to any one of claims 1 to 3, wherein the dew point temperature and the temperature are a dew point temperature and a temperature of a cooling process outlet or a space of a transport device connected to the cooling process outlet. Manufacturing method of oil cake.   The method for producing a vegetable oil koji according to any one of claims 1 to 4, wherein the treatment for controlling the drying step is to increase an exhaust amount of the drying step.   The manufacturing method of the vegetable oil cake of any one of Claims 1-5 through which the manufacturing method of the said vegetable oil cake passes a desolvation process, a drying process, a cooling process, and a granulation process. A dew point thermometer and a thermometer, or a hygrometer and a thermometer are installed so that any space of the device through which the vegetable oil can pass within 15 minutes after the meal cooler exit ,
Controlling the drying process and / or the cooling process so that the dew point temperature obtained from the dew point thermometer or the hygrometer and the thermometer is at least 1 ° C. lower than the temperature of the thermometer,
A vegetable oil syrup production apparatus characterized by the above. A dew point thermometer and a thermometer, or a hygrometer and a thermometer are installed so that the dew point temperature and temperature of any space of the device through which the vegetable oil can pass within 15 minutes after the meal cooler exit, Each electrically connected to the control device of the meal dryer and / or meal cooler,
Increase the exhaust amount of the meal dryer and / or increase the heating temperature of the meal dryer so that the dew point temperature of the space is 1 ° C. or more lower than the temperature of the thermometer of the space. increase,
A vegetable oil lees production management system characterized by that . Reduce the exhaust amount of the meal dryer and / or lower the heating temperature of the meal dryer so that the dew point temperature of the space does not become 15 ° C. or more lower than the temperature of the thermometer of the space. Reduce airflow,
The vegetable oil syrup production management system according to claim 8 .