JP3776531B2 - Continuous pressure steaming device using water-cooled rotary valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a continuous pressure cooking apparatus that uses a water-cooled rotary valve that performs pressure cooking while continuously supplying and transferring raw materials.
[0002]
[Prior art]
Pressurized steaming while pouring warm water of constant temperature (hereinafter referred to as hot water for brine) to defatted soybeans in soy sauce production, pressurized steaming and natto production while pouring hot water of constant temperature for bran in enzyme production In pressure steaming or the like, a continuous pressure steaming device (hereinafter abbreviated as steaming device) that can be steamed continuously while transferring raw materials is used to increase production efficiency. This steaming device keeps the inside of the pressurized steaming cannally sealed while maintaining the pressurized state while continuously charging and discharging the raw materials. Therefore, there are rotary valves at the raw material inlet and the raw material outlet of the pressurized steaming can. It is customary to be used. This rotary valve normally allows the rotor to be cooled.
[0003]
The reason for cooling the rotor of the rotary valve is as follows. Since the raw material to be steamed is pre-hydrated or the warm water for brine is submerged, it is easy to adhere to the rotor of the rotary valve heated by the hot air from the pressurized steaming can. If the raw material adheres to the rotor, the raw material charging port and the raw material discharging port are clogged, or the raw material continues to adhere to the rotor for a long time, causing discoloration and scorching and causing a problem that the raw material quality after cooking is lowered. In particular, in defatted soybeans containing protein, the protein gels, increases in viscosity and easily adheres to the rotor, and the problem becomes serious. Therefore, the inside of the rotor of the rotary valve is cooled to condense water vapor on the rotor surface, and a thin water film covering the rotor is used to suppress adhesion of the raw material to the rotor, so that even if it adheres, it can be easily peeled off. As the cooling means inside the rotor, air cooling is conceivable, but a water-cooled type is preferable for efficiently cooling the rotor, and at present, a water-cooled rotary valve is generally used. Conventionally, the flow path of the cooling water of the rotary valve and the flow path of the hot water for flooding that irrigates the raw material in the apparatus are naturally different systems due to the difference in their roles.
[0004]
[Problems to be solved by the invention]
In a conventional steaming device, hot water for submerged water that is submerged in the raw material is heated by steam by submerging a steam pipe in the stored submerged tank, or hot water that has been mixed with air and water (mixing of steam and water, the same applies hereinafter) is submerged. It is sent to the tank and generated. As described above, the warm water for flooding the raw material and the cooling water for the rotary valve constitute a separate flow path, and on the other hand, the heated cooling water after the rotor cooling (hereinafter referred to as the cooling water after heating). Was abandoned, and on the other hand, it was producing new warm water for flooding.
[0005]
The relationship between the cooling water and the warm water for drinking water can be said to be a very wasteful system from the viewpoint of energy use, but the cooling water and the warm water for drinking water cannot be handled in the same row. Because the cooling water is mainly intended to cool the rotor of the rotary valve, the flow rate is not constant and the temperature of the cooling water fluctuates after heating, but the hot water for drinking water needs to be constant and constant temperature Because. For this reason, conventionally, both had to be separated and the energy of the cooling water after heating was not used.
[0006]
Therefore, the development of a steaming device capable of reducing costs in terms of equipment and operation was attempted with the aim of improving energy efficiency and saving energy as a whole steaming device.
[0007]
[Means for Solving the Problems]
As a result of the study, what has been developed is a device that infuses raw water with hot water for drinking water and steams this raw material, with a water-cooled rotary valve at the raw material inlet or outlet of the pressurized steaming can. In addition, a water-cooled rotary valve is used which forms a flow path for generating warm water for drinking water using the heated water after passing through the rotary valve or a flow path using the cooled water after warming as the warm water for drinking water. Steaming device. The warm water for drinking water can be generated by heating the water indirectly with the cooling water after heating using a heat exchanger, but if there is no problem in water quality, the cooling water after warming is used as the warm water for drinking water. It is more efficient to use it as it is.
[0008]
In the said apparatus, the utilization rate of energy can be raised by controlling the flow volume or temperature of cooling water after heating, and the temperature of the hot water for drinking water can be maintained stably. Specifically, with respect to the water-cooled rotary valve, (a) a temperature measuring means for obtaining a measured value over time from the temperature of the cooling water after passing through the rotary valve, and the cooling water based on the measured value (B) a flow rate measuring means for obtaining a measured value over time from the flow rate of the cooling water passing through the rotary valve, and cooling based on the measured value. It is a steaming device that uses a water-cooled rotary valve that has a flow path provided with a flow rate control means for adjusting the flow rate of water. The cooling water for measuring the flow rate may be before or after passing through the rotary valve.
[0009]
The flow rate control means includes a calculation unit that determines the flow rate based on the measurement value (including a flow meter that feeds back the current flow rate, such as a computer or a controller), and a flow rate adjustment that is driven and controlled by this calculation unit. (For example, various open / close valves and pumps capable of increasing / decreasing the number of revolutions). The calculation unit and the flow rate adjustment unit may be integrated.
[0010]
The measurement value acquired by the temperature measurement unit or the flow rate measurement unit may be an analog value or a digital value as long as it is a value that is continuous over time. For example, an electromagnetic flow meter (flow rate measuring means) is placed in the middle of the piping from the rotary valve to the flooded tank, and the output of this electromagnetic flow meter, that is, the measured value (analog value), is opened and closed for piping that feeds cooling water to the rotary valve. Input to the controller (flow rate control means: calculation part) that operates the valve, let the controller operate the opening of the on-off valve (flow rate control means: flow rate adjustment part), or sample the output of the electromagnetic flowmeter The value obtained in this way may be input as a measured value (digital value) to a computer or the like (flow rate control means), and the computer may control a motor or the like that operates the opening of the on-off valve.
[0011]
If you try to use the cooling water after warming to generate warm water for flooding, even if the cooling water is set to an appropriate flow rate after warming, fluctuations occur over time (the valve that opens and closes the flow path is fixed to the flow path). Since the water pressure from the water source is not constant even if it is fixed to, the flow rate fluctuates as a result. If necessary, water must be replenished from an external water source, and a separate heating source must be prepared. After heating, cooling water and replenished water must be mixed and heated, but the amount of replenished water is large. In this case, there is a problem that the temperature of the hot water for dredging temporarily drops suddenly. The flow rate control stabilizes the temperature of the cooling water after heating or the flow rate of the cooling water that fluctuates with time, and realizes the generation of warm water for drinking water with a constant temperature by the cooling water after heating.
[0012]
In an apparatus that controls the flow rate of cooling water by measuring the temperature of the cooling water after heating, for example, the temperature of the cooling water after heating is increased or decreased by increasing or decreasing the flow rate of the cooling water to increase or decrease the amount of water relative to the amount of heat from the rotor. If the water temperature is equal to the temperature of the warm water for dredging, the amount of water that is usually not enough for the warm water for dredging is added to the cooling water after warming the water at a temperature equal to the warm water for dredging. Allow hot water to be secured.
[0013]
In an apparatus that controls the flow rate of cooling water by measuring the flow rate of cooling water, for example, if the amount of cooling water after heating is maintained at the required amount of hot water for brine, By simply raising the temperature of the hot water for drowning with steam or the like, it becomes possible to secure the hot water for drowning at a stable and constant temperature. Thus, the present invention makes it possible to efficiently generate warm water for drowning with a small temperature change by quantifying either the flow rate or the temperature of the cooling water after heating.
[0014]
The cooling water flow rate control based on the measured value of the cooling water temperature or the cooling water flow rate described above is the clearance between the rotor and casing of the rotary valve considering the pressure cooking pressure, pressure cooking temperature, and thermal expansion. By implementing it according to the size of the material or the degree of adhesion of the raw material to the surface of the rotor, for example, it is possible to achieve energy saving while suppressing the use of excessive energy, and to improve the performance as a steaming device, etc. Have multifaceted utility.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a steaming device for steaming defatted soybeans for soy sauce production, and the flow rate is supplied to both rotary valves 4 and 5 arranged at the raw material inlet 2 and the raw material outlet 3 of the pressurized steaming can 1. A flow path for flow control by measurement is configured. Both flow paths may be controlled by measuring the temperature (see FIG. 2). In this example, cooling water is added to the water stored in the flooded tank 6 after heating, and steam is added for temperature adjustment and water is added for replenishing the amount of water.
[0016]
The defatted soybeans are fed into the irrigation screw 7 at a rate of 2 t / h, irrigated with 70 ° C. warm water for irrigation at a rate of 2.6 t / h, and sent to the pressure steaming can 1 through the preheating screw 8. Rotary valves 4 and 5 are respectively arranged at the raw material inlet 2 and the raw material outlet 3 of the pressurized steaming can 1 to realize a substantially sealed state in the pressurized steaming can 1 and the charged raw material is 2 kg / Cook with cm ² G.
[0017]
In this example, the amount of the cooling water after heating returned from the rotary valves 4 and 5 to the brine tank 6 is kept at 1.2 t / h. That is, the cooling water is returned to the water tank 6 after heating a total of 2.4 t / h. As a result, the temperature of the cooling water after heating returned from the rotary valves 4 and 5 fluctuates in the range of 65 to 70 ° C., but the ratio of the cooling water after heating to the generated warm water is In addition to this, steam for temperature adjustment and water for replenishing the water amount are constant for the production of hot water for use, so that it is possible to easily adjust the temperature of hot water for drinking water simply by adjusting the amount of added steam. Rather, there is an advantage that the flow rate of the cooling water after heating can always be kept below the required amount of warm water for submerged water, and the use of cooling water after heating can be used with less waste.
[0018]
In the flow rate control, the electromagnetic flow meter 9 measures the flow rate of the cooling water that has passed through the rotary valve 4 (5), and outputs the measured value to the controller (FIC 10) in the calculation unit. Then, in the controller 10, the measured value and the set value (target value determined in advance and input to the controller) are compared, and the controller 10 is a rotary valve 4 (flow control unit) according to the difference. This is realized by opening / closing the opening / closing valve 11 of the pipe for sending the cooling water to 5).
[0019]
In the brine tank 6, steam and water are added to the cooling water after heating, and warm water for brine that is kept at a constant temperature (70 ° C. in this example) is generated. Steam measures the temperature of warm water for flooding in the flooded tank 6 with a temperature sensor 12, and a controller (TIC) 13 opens and closes a supply valve 14 to supply a necessary amount when the temperature is low. Further, the water is replenished when the amount of warm water for drowning in the drowning tank 6 becomes insufficient by an automatic water supply facility using the float valve 17 or the like. The warm water for dredging is drawn from the dredging tank 6 by the supply pump 15 and is drowned from the dredging pipe 16 in the dripping screw 7 toward the raw material.
[0020]
FIG. 2 is a block diagram of the steaming apparatus of the present invention for steaming bran for enzyme production. Both rotary valves 4 and 5 arranged at the raw material inlet 2 or the raw material outlet 3 of the pressure steaming can 1 are used. It constitutes a flow path for flow control by temperature measurement. In this example, the cooling water is added to the stored water in the flooded tank 6 after heating, and hot water by adding 65 ° C. air and water is added to supplement the amount of water.
[0021]
The bran is fed into the irrigation screw 7 at a rate of 1 t / h, and 65 ° C. warm water for irrigation is irrigated at a rate of 1.4 t / h, and is sent to the pressure steaming can 1 through the preheating screw 8. Rotary valves 4 and 5 are arranged at the raw material inlet 2 and the raw material outlet 3 of the pressurized steaming can 1 to realize a substantially sealed state in the pressurized steaming can 1 and 1.8 kg of the charged material. Cook at / cm ² G.
[0022]
In this example, the temperature of the cooling water after heating returned from the rotary valves 4 and 5 to the brine tank 6 is maintained at 65 ° C. As a result, the amount of the cooling water after heating returned from the rotary valves 4 and 5 varies in the range of 0.50 to 0.65 t / h. The temperature of the cooling water after heating returned to the flooded tank 6 Is equivalent to 65 ° C, which is the temperature of hot water for flooding, and has the advantage that almost no temperature adjustment is required. If the amount of cooling water after heating is made equal to or less than the required amount of warm water for drinking water, the cooling water will not be wasted after heating, and if the amount of water is insufficient, for example, the water surface in the drinking water tank 6 The level sensor 20 that monitors the height may be used to control the opening and closing of the solenoid valve 21 to replenish the hot water heated to 65 ° C., which is the same as the warm water for brine.
[0023]
In the temperature control, the temperature sensor 18 measures the temperature of the cooling water after passing through the rotary valve 4 (5), and outputs the measured value to the controller (TIC) 19 as a calculation unit. In the controller 19, the measured value and the set value (target value determined in advance and inputted to the controller) are compared, and the controller 19 is a rotary valve 4 (5 which is a flow rate adjusting unit) according to the difference. This is realized by opening and closing the opening / closing valve 11 of the pipe for sending the cooling water to the water-cooling water), and controlling the flow rate of the cooling water after returning to the flooded tank 6.
[0024]
In the brine tank 6, warm water is added to the cooling water after heating, and hot water maintained at a constant temperature (65 ° C. in this example) is generated. The hot water by the air-water mixture is replenished when the amount of hot water for drowning in the drowning tank 6 becomes insufficient by opening / closing the electromagnetic valve 21 controlled by the level sensor 20. The warm water for dredging is drawn from the dredging tank 6 by the supply pump 15 and drowned from the dredging pipe 16 in the dripping screw 7 toward the raw material.
[0025]
【The invention's effect】
With the steaming apparatus of the present invention, it has become possible to effectively use the cooling water after heating that has passed through a rotary valve that has been simply discarded. That is, the operation cost can be reduced by using the cooling water after heating as the production of the warm water for the brine or the warm water for the brine itself, and the equipment cost can be reduced by simplifying the flow path. Further, the present invention is characterized in that the temperature adjustment of the warm water for the brine in the flooded tank is simplified and all the processes requiring the temperature adjustment are realized by automatic control. As a result, the temperature variation of the warm water for drinking water is hardly seen, and the temperature stable water can be realized. As a result, the quality of the steamed product can be improved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a steaming apparatus of the present invention for steaming defatted soybeans for producing soy sauce.
FIG. 2 is a configuration diagram of a steaming apparatus according to the present invention for steaming bran as an enzyme.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pressurized steam can 2 Raw material inlet 3 Raw material outlet 4 Rotary valve of raw material inlet 5 Rotary valve of raw material outlet 6 Water tank 7 Water screw 8 Preheating screw 9 Electromagnetic flow meter
10 Controller (FIC)
11 Open / close valve
12 Temperature sensor in the water tank
13 Controller (TIC)
14 Supply valve
15 Supply pump
16 Flooded pipe
17 Float valve
18 Temperature sensor
19 Controller (TIC)
20 Level sensor (LC)
21 Solenoid valve

Claims (3)

A device for boiling hot water into the raw material and steaming the raw material. A water-cooled rotary valve is arranged at the raw material inlet or the raw material outlet of the pressurized steaming can, and the water passes through the rotary valve for heating. A continuous pressure steaming apparatus using a water-cooled rotary valve, characterized in that a flow path for generating warm water that is poured into the raw material using the cooled water or a flow path that uses the cooling water as the warm water is configured. A temperature measuring means for obtaining a measured value over time from the temperature of the cooling water heated through the rotary valve with respect to the water-cooled rotary valve, and a flow rate for adjusting the flow rate of the cooling water based on the measured value A continuous pressure steaming apparatus using a water-cooled rotary valve according to claim 1, wherein a flow path comprising a control means is configured. For the water-cooled rotary valve, it is provided with a flow rate measuring means for obtaining a measured value over time from the flow rate of the cooling water passing through the rotary valve, and a flow rate control means for adjusting the flow rate of the cooling water based on the measured value. A continuous pressurized steaming apparatus using the water-cooled rotary valve according to claim 1, wherein the flow path is configured.

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