JP2016215079A - Solid-liquid extraction device and solid-liquid extraction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-liquid extraction device and a solid-liquid extraction method which hardly allows fine powder to pass through a filter and can retain clarity of extracted liquid high.SOLUTION: A useful component in raw material is extracted as extracted liquid by supplying solvent into raw material. A solid-liquid extraction device includes a tank which has a filter part for filtering the extracted liquid on a lower part and stores raw material and solvent, a raw material supply part which supplies the raw material containing fine powder having a size capable of passing through the filter part, a solvent supply part which supplies solvent from the upper side into the tank and an extracted liquid discharge part which discharges the extracted liquid extracted, from the lower side of the tank. The solvent is supplied to a liquid surface level when the raw material accumulated in layers on the filter part of the tank is immersed in solvent and, thereafter, supply of solvent and discharge of the extracted liquid are continuously performed such that the liquid surface level of solvent in the tank becomes constant. The solid-liquid extraction device is regulated such that an average flow rate when the solvent passes through the raw material accumulated in layers becomes 8.5 mm/min or less in the height direction of the tank.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a solid-liquid extraction apparatus and a solid-liquid extraction method for extracting an extract using a raw material containing fine powder and a solvent.

  2. Description of the Related Art An extraction device is known that extracts useful components from a raw material containing fine powder such as coffee beans and skipjack tuna in a solvent such as warm water. FIG. 6 is a schematic diagram showing a configuration of a conventional solid-liquid extraction apparatus.

  As shown in FIG. 6, the conventional solid-liquid extraction device includes a bowl-shaped raw material mounting portion 2 in the tank 1. The raw material mounting portion 2 is formed in a mesh shape at the side and bottom, and a relatively large raw material 3 is deposited on the bottom, and a fine powder raw material 4 that is a fine powder is accommodated in a cloth bag and deposited thereon. Yes. Therefore, it is necessary to sort the raw materials in advance with relatively large materials and fine powders, and the efficiency of the extraction work is poor.

  Then, it leaves still or stirs in the state immersed in the extract, without classifying fine powder, and discharges the extract in a short time. For example, Patent Document 1 discloses a method for producing industrial espresso coffee in which finely ground coffee beans are put into a pressure vessel and coffee is extracted by spraying hot water evenly from a hot water shower nozzle.

  However, when the raw material contains fine powder, problems such as an increase in extraction time due to clogging of the filter used for extraction or a decrease in the clarification of the extract due to the fine powder itself passing through the filter occur. . Therefore, for example, Patent Document 2 discloses an extraction method in which an extraction chamber (tank) is divided into upper and lower portions by a partition filter, and the extraction liquid does not drip at the bottom until stirring is completed.

  In Patent Document 2, the extract is allowed to stand after the stirring treatment, whereby the particulate matter contained in the raw material is deposited on the partition filter in order from the one having the largest particle size. Therefore, the accumulated particulate matter functions as a filter for the fine powder, and the passage of the fine powder to the lower part of the extraction chamber and the clogging of the filter can be prevented in advance.

JP 2002-253122 A JP 2012-016300 A

  The fine powders are bonded to each other when a solvent for extracting the extract is dropped, making it difficult for the solvent to penetrate all the fine powders. Therefore, in order to secure a certain amount of the extract, it is necessary to increase the supply flow rate of the solvent to a certain level or more. When the flow rate at which the solvent passes through the raw materials deposited in layers becomes a certain level or more, the extraction time is shortened, so that the raw materials containing fine powder do not bind to each other. However, there is a problem that the fine powder easily passes through the filter as it is, and the clarity of the extract is lowered.

  The present invention has been made in view of such circumstances, and provides a solid-liquid extraction apparatus and a solid-liquid extraction method capable of maintaining fineness of an extracted liquid that is difficult for fine powder to pass through a filter. With the goal.

  In order to achieve the above object, a solid-liquid extraction apparatus according to the first invention is a solid-liquid extraction apparatus that extracts a useful component in a raw material as an extraction liquid by supplying a solvent to the raw material. A tank unit for storing a raw material and a solvent, a raw material supply unit for supplying a raw material containing fine powder having a size capable of passing through the filter unit, and the tank. A solvent supply unit for supplying a solvent from above and an extract liquid discharge unit for discharging the extracted extract from below the tank, and the raw material supply unit accumulates in a layer on the filter unit of the tank. The solvent supply to supply the solvent to the liquid level at which the raw material is immersed in the solvent, and then continuously supply the solvent and discharge the extract so that the liquid level of the solvent in the tank becomes constant Part and said A liquid amount adjusting unit that adjusts the operation of the liquid discharge unit. The liquid amount adjusting unit has an average flow rate of 8.5 mm / mm in the height direction of the tank through which the solvent passes through the raw material accumulated in layers. It is characterized by adjusting so that it may be less than a minute.

  In the first invention, the raw material is accumulated in a layered manner in the filter part of the tank, the solvent is supplied to a liquid level at which the accumulated raw material is immersed in the solvent, and then the liquid level of the solvent in the tank is constant. Continuously adjust the supply of solvent and discharge of the extract. By adjusting the average flow rate through which the solvent passes through the raw material accumulated in layers to be 8.5 mm / min or less in the height direction of the tank, the amount of liquid discharged can be suppressed relatively small, It becomes easy to adjust the liquid amount to be constant, and the possibility of liquid clogging can be reduced.

  In the solid-liquid extraction device according to a second aspect of the present invention, in the first aspect, the liquid amount adjustment unit is configured such that the supplied raw material is accumulated in the filter unit in a layered manner, and then the extraction liquid discharge unit side of the tank. It is preferable that the solvent is supplied by backflowing from the outlet.

  In the second invention, since the supplied raw material is accumulated in layers in the filter unit, the solvent is supplied by flowing backward from the extract liquid discharge part side of the tank, so that the raw material accumulated in the piping of the extract liquid discharge part and in layers The inside air can be eliminated, and the extract can be obtained efficiently.

  In the solid-liquid extraction apparatus according to the third aspect of the present invention, in the second aspect, the liquid amount adjusting unit preferably supplies the solvent also from the solvent supply unit.

  In the third invention, since the solvent is also supplied from the solvent supply unit provided above the tank, the fine powder raw material floating on the liquid level of the solvent supplied by flowing back from the extract discharge part side of the tank is surely obtained. Can be immersed in a solvent.

  In the solid-liquid extraction device according to a fourth aspect of the present invention, in the first aspect, the liquid amount adjustment unit preferably supplies the solvent before the raw material is supplied from the raw material supply unit.

  In the fourth invention, since the solvent is supplied before the raw material is supplied, it is possible to accumulate the raw material in layers after eliminating the air in the piping of the extract discharge part, and to obtain the extract efficiently. It becomes possible.

  In the solid-liquid extraction device according to a fifth aspect of the present invention, in the fourth aspect, the liquid amount adjusting unit preferably further supplies the solvent from the solvent supply unit after the raw material is supplied.

  In the fifth invention, after the raw material is supplied, the solvent is further supplied from the solvent supply section provided above the tank, so that the fine powder raw material floating on the liquid surface of the supplied solvent is surely immersed in the solvent. It becomes possible to make it.

  Next, in order to achieve the above object, a solid-liquid extraction method according to a sixth aspect of the present invention includes a filter unit for filtering the extract at the bottom, a tank for storing raw materials and a solvent, and the filter unit in the tank. A raw material supply unit that supplies a raw material containing fine powder of a size that can pass through, a solvent supply unit that supplies a solvent into the tank from above, and an extracted extract is discharged from below the tank. And a liquid-liquid extraction method capable of being performed by a solid-liquid extraction apparatus that extracts a useful component in the raw material as an extract by supplying a solvent to the raw material, The solid-liquid extraction device includes a step of accumulating the raw material in the filter unit of the tank by the raw material supply unit, a step of supplying the solvent to a liquid level at which the accumulated raw material is immersed in the solvent, Level of solvent level A step of continuously adjusting the supply of the solvent and the discharge of the extract so as to be constant, and the average flow rate of the solvent passing through the raw material accumulated in layers is 8.5 mm / in the height direction of the tank. It is characterized by adjusting so that it may be less than a minute.

  In the sixth invention, the raw material is accumulated in a layered manner in the filter part of the tank, the solvent is supplied to a liquid level at which the accumulated raw material is immersed in the solvent, and then the liquid level of the solvent in the tank becomes constant. Continuously adjust the supply of solvent and discharge of the extract. By adjusting the average flow rate through which the solvent passes through the raw material accumulated in layers to be 8.5 mm / min or less in the height direction of the tank, the amount of liquid discharged can be suppressed relatively small, It becomes easy to adjust the liquid amount to be constant, and the possibility of liquid clogging can be reduced.

  The solid-liquid extraction method according to a seventh aspect of the present invention is the method according to the sixth aspect, wherein the supplied raw material is accumulated in the filter portion in a layered manner, and then the solvent is supplied by flowing backward from the extract discharge portion side of the tank. It is preferable.

  In the seventh aspect of the invention, since the raw material is supplied first and accumulated in the filter section in a layered manner, the solvent is supplied by flowing back from the extract liquid discharging section side of the tank. Thus, the air in the raw material can be eliminated, and the extract can be obtained efficiently.

  In the solid-liquid extraction method according to the eighth aspect of the present invention, preferably, the solvent is also supplied from the solvent supply unit.

  In the eighth invention, since the solvent is also supplied from the solvent supply unit provided above the tank, the fine powder material floating on the liquid level of the solvent supplied by flowing back from the extract discharge unit side of the tank is surely obtained. Can be immersed in a solvent.

  In the solid-liquid extraction method according to the ninth aspect of the present invention, in the sixth aspect of the present invention, it is preferable to supply the solvent before supplying the raw material from the raw material supply unit.

  In the ninth invention, since the solvent is supplied before the raw material is supplied, the raw material can be accumulated in layers after eliminating the air in the piping of the extract discharge part, and the extract can be obtained efficiently. It becomes.

  In the solid-liquid extraction method according to the tenth aspect of the present invention, in the ninth aspect of the present invention, it is preferable to further supply a solvent from the solvent supply section after supplying the raw material.

  In the tenth invention, after supplying the raw material, the solvent is further supplied from the solvent supply unit provided above the tank, so that the fine powder material floating on the liquid surface of the supplied solvent is surely immersed in the solvent. It becomes possible.

  According to the present invention, the raw material is accumulated in a layered manner in the filter part of the tank, the solvent is supplied to a liquid level at which the accumulated raw material is immersed in the solvent, and then the liquid level of the solvent in the tank is constant. , Continuously adjust the supply of solvent and the discharge of the extract. By adjusting the average flow rate through which the solvent passes through the raw material accumulated in layers to be 8.5 mm / min or less in the height direction of the tank, the amount of liquid discharged can be suppressed relatively small, It becomes easy to adjust the liquid amount to be constant, and the possibility of liquid clogging can be reduced.

It is a schematic cross section which shows the structure of the solid-liquid extraction apparatus which concerns on Embodiment 1 of this invention. It is an illustration figure which shows the structure of the fixed shower nozzle of the solid-liquid extraction apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the procedure of the extraction process of the solid-liquid extraction apparatus which concerns on Embodiment 1 of this invention. It is a schematic cross section which shows the structure of the tank of the solid-liquid extraction apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the procedure of the extraction process of the solid-liquid extraction apparatus which concerns on Embodiment 2 of this invention. It is a schematic diagram which shows the structure of the conventional solid-liquid extraction apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic cross-sectional view showing the configuration of the solid-liquid extraction apparatus according to Embodiment 1 of the present invention. As shown in FIG. 1, a raw material and a solvent are supplied and stored in the tank 101 of the solid-liquid extraction apparatus according to the first embodiment to obtain an extracted extract. In addition, an appropriate liquid is employ | adopted for a solvent with the kind of raw material and the extract to be extracted. For example, water, ethanol aqueous solution, etc. correspond.

  The tank 101 is provided with a mesh-like filter portion 102 at the bottom. The raw material in the first embodiment is supplied from the upper part of the tank 101 into the tank 101 by a raw material supply unit (not shown). The supplied raw material is accumulated in the filter unit 102 as a raw material layer 103 in layers. The solvent is supplied to the raw material layer 103 accumulated in layers from the upper side of the tank 101 through the pipe 105 (solvent supply unit), and the extract extracted from the discharge port (extract solution discharge unit) 108 at the lower part of the tank 101 is supplied. Discharge.

  The raw material is a mixture of a raw material having a size that cannot pass through the mesh of the filter unit 102 and a fine powder raw material that can pass through the mesh of the filter unit 102. For example, first, shiitake is supplied as a raw material that cannot pass through the mesh of the filter unit 102, and a cutlet of bonito is supplied as a fine powder raw material that can pass through the mesh of the filter unit 102 thereon. In this Embodiment 1, the ratio of the fine powder raw material in a raw material shall be 10% or more by a weight ratio.

  A pipe 105 (solvent supply unit) for supplying a solvent is connected to a motor 106 at the center of the tank 101 so that it can rotate. Further, the leveling blade 104 and the shower nozzle 107 (solvent supply unit) are attached to the pipe 105.

  The pipe 105 has a telescopic structure. Therefore, the height of the leveling blades 104 can be varied according to the height of the raw material layer 103 accumulated in layers, and the raw material layer 103 can be leveled evenly.

  The shower nozzle 107 is connected to the pipe 105 and can spray (supply) the solvent onto the raw material. The shower nozzle 107 may rotate as the pipe 105 rotates, or may be fixed without being attached to the pipe 105.

  FIG. 2 is an exemplary diagram showing a configuration of the fixed shower nozzle 107 of the solid-liquid extraction apparatus according to Embodiment 1 of the present invention. As shown in FIG. 2, as a fixed shower nozzle 107, a plurality of nozzle holes 122 are provided in an annular pipe 121 for supplying a solvent, and the shower nozzle 107 is attached to the inner wall above the tank 101. By supplying the solvent into the pipe 121 via the pipe 105, the solvent can be evenly distributed (supplied) from the nozzle holes 122 to the raw material.

  In the first embodiment, the raw material layer 103 is accumulated on the filter portion 102 of the tank 101, and the solvent is supplied to a liquid level at which the accumulated raw material layer 103 is immersed in the solvent. Thereafter, a liquid amount adjusting unit 200 is provided for continuously adjusting the supply of the solvent and the discharge of the extract so that the level of the solvent in the tank 101 becomes constant. The liquid amount adjustment unit 200 includes a solvent supply unit 200a and an extraction liquid discharge unit 200b. The liquid amount adjustment unit 200 adjusts the amount of liquid stored in the tank 101 by controlling the operation of both, and the liquid level of the solvent. Can be adjusted to be constant.

  The solvent supply unit 200 a includes the above-described shower nozzle 107, pipe 105, liquid meter 201, supply pump 202, and frequency adjuster 203. The extraction liquid discharge unit 200b includes the above-described discharge port 108, discharge pump 210, liquid meter 211, and frequency adjuster 212. Further, a level sensor 300 for measuring the liquid level of the solvent is provided, and the supply pump 202 and the discharge are adjusted by adjusting the frequency so as to adjust the liquid amounts of the supply pump 202 and the discharge pump 210 according to the liquid level. The rotation speed of the pump 210 can be adjusted.

  The solvent supply unit 200a includes a liquid meter 201 that measures the liquid volume from the passing weight of the solvent. The amount of liquid discharged from the supply pump 202 is adjusted by adjusting the rotation speed of the supply pump 202 according to the frequency set by the frequency adjuster 203. Similarly, the extraction liquid discharger 200b includes a liquid meter 211 that measures the liquid volume from the passing weight of the extraction liquid. The amount of liquid discharged to the discharge pump 210 is adjusted by adjusting the number of revolutions of the discharge pump 210 according to the frequency set by the frequency adjuster 212.

  In the solid-liquid extraction apparatus according to the first embodiment, the raw material is first supplied, and the raw material layer 103 is formed on the filter unit 102 in the tank 101. Then, in order to efficiently discharge the extract from the extract discharge section 200b of the liquid amount adjustment section 200, the discharge pump 210 is rotated in the reverse direction to supply the solvent into the tank 101 from the discharge port 108 side. Thereby, the air remaining in the piping on the discharge port 108 side can be removed.

  In addition, since the solvent is supplied from the discharge port 108 side, the fine powder raw material that is relatively large in the upper layer of the raw material layer 103 tends to float on the liquid surface of the solvent. Therefore, it is preferable to supply the solvent from the shower nozzle 107 via the pipe 105 provided above the tank 101 via the solvent supply unit 200a. Suppressing the pulverized raw material from floating on the liquid surface of the solvent by sandwiching the pulverized raw material that tends to float on the liquid surface of the solvent between the solvent supplied from the discharge port 108 and the solvent supplied from the shower nozzle 107. Is possible.

  The liquid amount adjustment unit 200 adjusts so that the amount of liquid supplied into the tank 101 is the same as the amount of liquid extracted from the tank 101. FIG. 3 is a flowchart showing the procedure of the extraction process of the solid-liquid extraction apparatus according to Embodiment 1 of the present invention.

  FIG. 3A is a flowchart showing a procedure of extraction processing of a conventional immersion type solid-liquid extraction apparatus. As shown in FIG. 3A, first, a solvent is supplied into the tank 101 (step S301). For example, when extracting the soup from shiitake and bonito shavings, 140 L of water is supplied.

  Next, a raw material containing 10% or more of the fine powder raw material is supplied into the tank 101 (step S302). For example, 3.87 kg of shiitake, which is a relatively large raw material, and 3.87 kg of cutlet of bonito, which is a fine powder raw material, are supplied. It is soaked for a certain time (about 40 minutes) so that the raw material is completely immersed in the solvent (step S303).

  Then, the extraction liquid is discharged over an extraction time at a constant flow rate (step S304). For example, an extraction liquid 111L is obtained at a liquid volume of 333 L / hour over an extraction time of 20 minutes. The target weight of the extract is at least three times that of the raw material.

  When soaked as shown in FIG. 3 (a), the concentration of the extract is reduced, so that a large amount of extract of 111 L, that is, 333 L per hour, is discharged in 20 minutes of extraction time. Since the liquid volume of the extracted liquid to be discharged becomes large, it is difficult to adjust the liquid volume of the liquid extract to be constant, and liquid clogging may occur in the filter unit 102.

  FIG.3 (b) is a flowchart which shows the procedure of the extraction process of the semi-penetration type solid-liquid extraction apparatus which concerns on Embodiment 1 of this invention. As shown in FIG. 3B, first, a raw material containing 10% or more of the fine powder raw material by weight is supplied into the tank 101. In FIG.3 (b), the turmeric which is a raw material containing a comparatively big raw material and 10 weight% or more of fine powder is supplied, for example (step S311).

  Next, a solvent is supplied into the tank 101 from the outlet 108 side (step S312). For example, when extracting an extract from turmeric, 30 L of water is supplied from the outlet 108 side. As a result, air is not mixed into the piping for discharging the extract, and thus the extract can be discharged smoothly.

  When it is determined whether turmeric, which is a raw material containing 10% or more by weight of the fine powder raw material, is completely immersed in the solvent (step S313), and it is determined that the turmeric is not completely immersed in the solvent (step S313) : NO), the solvent supply is continued until the turmeric is completely immersed. When it is determined that the turmeric is completely immersed in the solvent (step S313: YES), the solvent supply amount is changed to be the same as the extraction liquid discharge amount (step S314), and the solvent supply and the extraction liquid discharge are performed. Are simultaneously performed (step S315). Specifically, the supply is switched from the solvent supply unit 200 a that supplies the solvent from above the tank 101. For example, while supplying the solvent from the solvent supply unit 200a that supplies the solvent from above the tank 101 at 100 L / hour, the extract is discharged from the extract discharge unit 200b that discharges the extract from below the tank 101 at 100 L / hour. . In order to adjust the concentration of the extract, 100 L of extract is obtained by discharging the extract over 60 minutes.

  In this way, the solvent level in the tank 101 becomes constant by simultaneously supplying the solvent and discharging the extract in the same amount. Thereby, the liquid volume of the discharged extract can be suppressed to be relatively small, and the clogging of the filter unit 102 can be suppressed. The liquid level height (liquid level) of the solvent in the tank 101 is measured by the level sensor 300.

  The liquid amount adjustment unit 200 adjusts the concentration of the extract by adjusting the operations of the solvent supply unit 200a and the extract discharge unit 200b. Specifically, the average flow rate of the solvent passing through the raw material layer 103 which is a layered raw material in the tank 101 is adjusted to be 8.5 mm / min or less in the height direction of the tank 101. By suppressing the average flow rate through which the solvent passes through the raw material layer 103 to be relatively small, fluctuations in liquid volume are unlikely to occur. Therefore, the possibility of liquid clogging can be reduced. As a result, an extract liquid having a weight about 7.5 times that of the supplied turmeric was obtained.

  In addition, in the flowchart shown to Fig.3 (a) and (b), extraction of the extract was performed using the tank 101 with an internal diameter of 500 mm. In FIG. 3A, since the extract was discharged at 333 L / hour, the average flow rate of the solvent passing through the raw material layer 103 was relatively large at about 28.3 mm / min. On the other hand, in FIG. 3B, since the extract was discharged at 100 L / hour, the average flow rate of the solvent passing through the raw material layer 103 was about 8.5 mm / minute.

  Moreover, it is preferable that the lower part of the tank 101 is an openable type. FIG. 4 is a schematic cross-sectional view showing the configuration of the tank 101 of the solid-liquid extraction apparatus according to Embodiment 1 of the present invention.

  As shown in FIG. 4, a lid 400 that can be opened and closed by a hinge or the like is provided at the bottom of the tank 101. By attaching the filter unit 102 to the lid part 400 in a detachable manner, the extracted raw material layer 103 accumulated in the filter part 102 with the lid part 400 opened can be easily discarded, and maintenance can be performed. It becomes easy.

  As described above, according to the first embodiment, the average flow rate through which the solvent passes through the raw material layer 103 is adjusted to be 8.5 mm / min or less in the height direction of the tank 101, and the discharged extraction is performed. The amount of liquid can be suppressed to a relatively small value, and it is easy to adjust the amount of the extracted liquid to be constant, and the possibility of clogging can be reduced.

(Embodiment 2)
Since the configuration of the solid-liquid extraction device according to the second embodiment of the present invention is the same as that of the first embodiment, detailed description thereof will be omitted by attaching the same reference numerals. The second embodiment is different from the first embodiment in that the immersion state of the raw material in the solvent is performed by supplying the raw material after first supplying the solvent.

  FIG. 5 is a flowchart showing the procedure of the extraction process of the solid-liquid extraction apparatus according to Embodiment 2 of the present invention. As shown in FIG. 5, first, a solvent is supplied into the tank 101 (step S501). For example, when extracting soup stock from shiitake mushrooms and bonito shavings, 30 L of water is supplied.

  In addition, what is necessary is just to supply a solvent via the piping 105 provided above the tank 101 via the solvent supply part 200a. Of course, the solvent may be supplied from the side of the discharge port 108 constituting the extract discharge unit 200b.

  Next, a raw material containing 10% or more of the fine powder raw material by weight is supplied into the tank 101. In FIG. 5, for example, 3.87 kg of shiitake, which is a relatively large raw material, is supplied (step S502), and then 3.87 kg of cutlet of bonito, which is a fine powder raw material, is supplied (step S503). In this state, a raw material containing 10% or more by weight of the fine powder raw material is completely immersed in the solvent.

  In addition, after supplying a raw material, before a raw material is immersed in a solvent completely, you may supply a solvent further from the shower nozzle 107 which comprises the solvent supply part 200a (step S504). This is because it is possible to prevent the fine powder raw material from easily floating on the liquid surface of the solvent by further supplying the solvent from the solvent supply unit 200 a that supplies the solvent from above the tank 101.

  In this state, the supply amount of the solvent is changed to be the same as the discharge amount of the extraction liquid (step S505), and the supply of the solvent and the discharge of the extraction liquid are performed simultaneously (step S506). Specifically, the supply amount from the solvent supply unit 200a that supplies the solvent from above the tank 101 is switched to be equal to the discharge amount from the extract discharge unit 200b that discharges the extract from below the tank 1010. For example, the supply amount from the solvent supply unit 200a that supplies the solvent from the upper side of the tank 101 is switched to 80 L / hour to supply the solvent, and the discharge amount from the extract discharge unit 200b that discharges the extract from the lower side of the tank 101. The extract is discharged at 80 L / hour. In order to adjust the concentration of the extract, 80 L of extract is obtained over 60 minutes of extraction time. As a result, it was possible to obtain an extract having a weight about 5.5 times that of the supplied shiitake and bonito shavings.

  Also in the flowchart shown in FIG. 5, extraction of the extract is performed using the tank 101 having an inner diameter of 500 mm. Since the extract was discharged at 80 L / hour, the average flow rate of the solvent passing through the raw material layer 103 was about 6.8 mm / min.

  As described above, according to the second embodiment, the raw material is accumulated in layers in the filter unit 102 of the tank 101, and the solvent is supplied to a liquid level (liquid level height) at which the accumulated raw material layer 103 is immersed in the solvent. Then, the supply of the solvent and the discharge of the extract are continuously adjusted so that the liquid level of the solvent in the tank 101 becomes constant. By adjusting the average flow velocity for the solvent to pass through the raw material layer 103 to be 8.5 mm / min or less in the height direction of the tank 101, the amount of the extracted liquid to be discharged can be suppressed to be relatively small. Thus, it becomes easy to adjust the amount of the extraction liquid to be constant, and the possibility of liquid clogging can be reduced.

  In addition, it goes without saying that various modifications can be made to the above-described embodiment without departing from the spirit of the present invention. For example, it is not limited to adjusting the frequency so as to adjust the liquid amounts of the supply pump 202 and the discharge pump 210, but may be adjusted by providing a valve on the pipe and adjusting the opening of the valve. good.

  Further, as the level sensor 300 for measuring the level of the solvent in the tank 101, a differential pressure transmitter, a load cell, or an upper limit and a lower limit of a level are set, A flow switch, a capacitance type level switch, or the like may be applied as the upper / lower limit indicator.

101 Tank 102 Filter part 103 Raw material layer 105 Piping (solvent supply part)
107 Shower nozzle 108 Discharge port 200 Liquid volume adjustment unit 200a Solvent supply unit 200b Extraction liquid discharge unit 300 Level sensor 400 Lid

Claims (10)

A solid-liquid extraction device that extracts a useful component in a raw material as an extract by supplying a solvent to the raw material,
A filter unit for filtering the extract is provided at the bottom, a tank for storing raw materials and solvents,
A raw material supply unit for supplying a raw material containing fine powder having a size capable of passing through the filter unit in the tank;
A solvent supply unit for supplying a solvent from above into the tank;
An extract discharge part for discharging the extracted extract from below the tank,
The raw material supply unit supplies the solvent to a liquid level at which the raw material accumulated in layers in the filter unit of the tank is immersed in the solvent, and then continuously so that the liquid level of the solvent in the tank becomes constant. A liquid amount adjusting unit that adjusts the operation of the solvent supplying unit and the extract discharging unit so as to supply the solvent and discharge the extracting solution,
The liquid amount adjusting unit adjusts the average flow rate of the solvent passing through the raw material accumulated in layers so that the average flow rate is 8.5 mm / min or less in the height direction of the tank.   2. The liquid amount adjusting unit according to claim 1, wherein after the supplied raw material is accumulated in a layered manner in the filter unit, the liquid amount adjusting unit is made to flow backward from the extraction liquid discharge unit side of the tank to supply the solvent. Solid-liquid extraction equipment.   The solid-liquid extraction apparatus according to claim 2, wherein the liquid amount adjustment unit supplies the solvent also from the solvent supply unit.   The solid-liquid extraction apparatus according to claim 1, wherein the liquid amount adjustment unit supplies the solvent before the raw material is supplied from the raw material supply unit.   The solid-liquid extraction device according to claim 4, wherein the liquid amount adjustment unit further supplies a solvent from the solvent supply unit after the raw material is supplied. A filter unit for filtering the extract is provided at the bottom, a tank for storing raw materials and solvents,
A raw material supply unit for supplying a raw material containing fine powder having a size capable of passing through the filter unit in the tank;
A solvent supply unit for supplying a solvent from above into the tank;
And an extract discharge unit that discharges the extracted extract from the lower side of the tank, and a solvent is supplied to the raw material to extract a useful component in the raw material as an extract. A solid-liquid extraction method capable of
The solid-liquid extraction device is:
A step of accumulating raw materials in the filter section of the tank in layers by the raw material supply section;
Supplying the solvent to a liquid level at which the accumulated raw material is immersed in the solvent;
Continuously adjusting the supply of the solvent and the discharge of the extract so that the liquid level of the solvent in the tank is constant,
A solid-liquid extraction method characterized in that an average flow rate through which the solvent passes through the raw material accumulated in layers is adjusted to 8.5 mm / min or less in the height direction of the tank.   The solid-liquid extraction method according to claim 6, wherein after the supplied raw material accumulates in a layered manner in the filter unit, the solvent is supplied by flowing backward from the extract liquid discharge unit side of the tank.   The solid-liquid extraction method according to claim 7, wherein the solvent is also supplied from the solvent supply unit.   The solid-liquid extraction method according to claim 6, wherein the solvent is supplied before the raw material is supplied from the raw material supply unit.   The solid-liquid extraction method according to claim 9, further comprising supplying the solvent from the solvent supply unit after supplying the raw material.

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