JP5142352B2 - Submerged grinding apparatus and submerged grinding system - Google Patents

Description

The present invention relates to a submerged grinding apparatus used when a solid raw material such as cereals and pharmaceutical raw materials is crushed and ground by a submerged grinding apparatus, and in particular, a liquid for preventing air contamination. It relates to medium grinding equipment. Further, raw liquid feed solid and long-term stability and was fed, relates to submerged grinding system comprising a device for discharging.

  For example, in the traditional method of making soy milk and tofu by adding ground water to soaked soybeans and making soymilk and tofu, air is mixed in the soymilk and subsequent spillage occurs in boiling. Because it causes uneven cooking, it is prevented using an antifoaming agent. The use of extra food additives is not only shunned by consumers, but it also puts pressure on producers. The antifoaming agent is widely used not only in the food industry but also in order to eliminate the foam mixed during grinding.

Under such circumstances, the grinding device for grinding or grinding solid materials such as soybeans has been improved, and Patent Document 1 and Patent Document 2 describe that grains and beans are finely ground in a sealed container that does not contain air. A pump mill is disclosed. Patent Document 3 discloses a submerged grinding method in a vacuum or an anaerobic gas atmosphere. Patent Documents 4 and 5 disclose a method of grinding soaked soybeans in an oxygen-free atmosphere (underwater grinding). In particular, Patent Document 5 discloses a method of connecting a metering pump before and after an attritor as an underwater attrition method (apparatus). Patent Document 6 discloses a method of pushing into a grinder with a metering pump.
Japanese Utility Model Publication No. 51-74864 Japanese Utility Model Publication No. 50-53481 Japanese Patent Laid-Open No. 3-16656 JP-A-48-28656 JP 52-154545 A Japanese Utility Model Publication No. 6-42474

  However, the conventionally devised submerged pulverization method requires large and expensive equipment and a large installation space, and requires expensive incidental equipment costs such as a plurality of positive displacement pumps. Further, a dearator process has been performed in a later process. In addition, all of the conventional methods are performed based on the technical idea of press-fitting a solid raw material and a liquid raw material. When the ratio of the liquid raw material increases, the pulverized state becomes rough and the burden on the grinder increases, which is higher than necessary. Since a horsepower motor was required, excess energy was used, and product quality could be degraded due to heat generation deterioration of raw materials. Further, a high concentration solid raw material (eg, 1: 1 with a liquid raw material) is likely to lead to operational troubles such as clogging of the solid raw material, particularly during long-time operation. Therefore, at present, submerged grinding is not very popular.

  In particular, when the liquid raw material is less than the solid raw material, only the liquid raw material is easy to pass through first, and the continuous grinding of the solid raw material and the liquid raw material in a single pass in a balanced manner means that the processing capacity and concentration The adjustment range of the ratio of the liquid raw material and the liquid raw material is narrow, and it is very difficult to stabilize. Therefore, in the past, the actual situation was that there was only a batch continuous process in which the cyclic grinding process was interrupted for each batch, or a process in which the grinding was repeated several times and ground.

The present invention was proposed for the purpose of solving these problems and responding to the needs of the market, and can use conventional raw materials and equipment, and can achieve stable continuous operation with minimal initial investment. It is an object of the present invention to provide a submerged grinding apparatus, a submerged grinding system, and a submerged grinding method capable of realizing a high quality product. In addition, the present invention does not require the use of an antifoaming agent more than necessary, particularly in the production of soymilk and tofu, and further, it becomes easy to comply with organic agricultural products processed food standards by making it nonfoaming. It can improve the flavor and storability of soymilk and tofu, and is applicable to any case where solid raw materials are mixed in a continuous and intense swirling liquid like a grinder without mixing air. It is an object to provide a submerged grinding apparatus and a submerged grinding system.

  In the continuous operation of the submerged grinding apparatus, the inventors have pursued an inexpensive supply system that can supply the liquid raw material in a well-balanced manner without clogging the solid raw material, and can operate stably for a long time. As a result, it has been found that it is effective to control the solid raw material and the liquid raw material at the supply port of the submerged grinding device, and it is possible to continuously operate for a long time without sufficiently biting air. It came to complete. In the present invention, emphasis is placed on the grinding process that is the main cause of foam generation. Problems with conventional submerged grinding methods (unstable continuous operation for a long time, high-concentration grinding is difficult, equipment is expensive, etc.) ).

The inventions according to claims 1 and 4 have been completed based on such findings. That is, the invention according to claim 1 of the present application includes a hopper into which a solid raw material and a liquid raw material are charged and supplied, a grinding chamber for grinding the solid raw material together with the liquid raw material in a grinding section, and a space between the hopper and the grinding chamber. And a flow control means provided below the liquid level, the level of the raw material in the hopper into which the solid raw material and the liquid raw material are charged is detected by a liquid level sensor, and the solid raw material together with the liquid raw material is contained in the grinding chamber. When grinding in a grinding part to form a slurry, the liquid level of the liquid raw material is set so as to fill the grinding chamber and at least part of the hopper, and the grinding is performed. And Further, the invention of claim 4 is a hopper into which a solid raw material and a liquid raw material are input and supplied, a grinding chamber for grinding the solid raw material together with the liquid raw material in a grinding section, and between the hopper and the grinding chamber, And a flow control means provided below the liquid level, and the flow rate of the liquid raw material and the solid raw material is detected by a measuring means such as a flow meter and a weight meter, or the flow rate of the ground product is discharged from the grinding device. Detected with a flow meter provided after the outlet, and when the solid raw material is ground together with the liquid raw material in the grinding section in the grinding chamber to form a slurry, the liquid level of the liquid raw material satisfies the grinding chamber And it sets so that at least one part of the said hopper may be filled, It is characterized by performing the said grinding. Note that the discharge side of the submerged grinding device may be received by the balance tank by a drop in an open state.

  In the submerged grinding apparatus according to the present invention, the solid raw material is ground in the liquid. Therefore, the mixed slurry (ground product) of the ground solid material and the liquid material does not entrap air. Here, in particular, by providing a flow control means between the hopper and the grinding chamber, the vortex generated by the rotation of the grinding section is cut off, preventing the generation of vortex in the hopper filled with the raw material to a certain level. Is done. As a result, the phenomenon of biting air (bubbles) is avoided, and the defoaming agent and energy consumption can be reduced.

  Further, the flow restricting means can be configured without a special movable part such as a means for providing one to a plurality of flat plates, a means for providing a swirl prevention device in which two flat plates are combined in a cross, and the like. Is not coarsely crushed before being fed to the grinding chamber. The grinding machine is basically a system composed of one station (one unit).

  The flow control means for the submerged grinding apparatus of the present invention requires only a relatively simple addition of components, so that the capital investment is small. Moreover, a large installation space and expensive incidental facilities are unnecessary.

The said flow control means provided in the submerged grinding apparatus according to claim 1 is a means for providing one to a plurality of flat plates in the vicinity of a supply port of the submerged grinding apparatus, and a spiral formed by combining two flat plates in a cross shape. means for providing the arrestor, it means for providing a spiral in the pipe, means to meander piping, or, and that portion of the solid material extending from the hopper to the supply port is one of means for configuring narrow enough to be sufficiently pass You can also. By providing the static flow restricting means (non-movable) in the present invention between the hopper and the grinding chamber, the vortex generated by the rotation of the grinding portion is blocked (flow restricted), and the raw material is filled to a certain level. Occurrence of vortices in the hopper is prevented, the phenomenon of biting air (bubbles) is avoided, and the solid raw material is relatively smoothly supplied to the grinding chamber, reducing the defoaming agent and energy consumption. In addition, in the flow control means without a movable part etc. like this invention, since it is sufficient to add a comparatively simple component, capital investment can be reduced (refer each (a) and (b) of FIGS. 9-13).

The flow restricting means provided in the submerged grinding apparatus of the present invention has a shape that enlarges the flow path in the vicinity of the supply port of the submerged grinding apparatus. A plurality of blades may be attached to partition the expanded flow path . In the present invention, by providing a static flow restricting means (fixed type) between the hopper and the grinding chamber, the vortex generated by the rotating flow in the grinding chamber is blocked (controlled), and the raw material is filled to a certain level. The generation of vortices in the hopper is prevented. As a result, the solid raw material is smoothly supplied to the grinding chamber, and the phenomenon of biting air (bubbles) is avoided, so that defoaming agents and energy consumption can be reduced. In addition, in the flow restricting means having no movable part or the like as in the present invention, a relatively simple component can be added, so that the capital investment can be reduced (FIGS. 19, 20 (a) to (c), FIG. (See FIGS. 22, 14, 16, and 47).

In the present invention, the flow restricting means provided in the submerged grinding apparatus can supply the solid material supplied from the hopper to the grinding chamber by at least one impeller . The impeller may be a uniaxial rotary blade, a biaxial rotary blade, or a screw spiral blade. In the present invention, by providing a dynamic flow control means (movable type) between the hopper and the grinding chamber, the vortex generated by the rotating flow in the grinding chamber is blocked (controlled), and the raw material is filled to a certain level. Vortex generation in the hopper is prevented, and the phenomenon of air (bubbles) is avoided. In particular, solid raw materials are supplied to the grinding chamber very smoothly, reducing the defoaming agent and energy consumption. . In addition, in the flow control means with a movable part like this invention, supply of a solid raw material becomes accurate and the density | concentration of a ground material is stabilized. Although some components increase, the capital investment can still be reduced compared to the prior art. In the case of the screw spiral blade rotates so as to push the solid raw materials, Ru effectively der better was opposite to the rotating direction of the attritor (FIGS. 1-5, 15, 18, 23, (See FIGS. 26 to 46) .

As the present invention, the flow restricting means provided in the submerged grinding apparatus includes a feeding means having at least one feeding roll, or at least a feeding means having a pair of opposing feeding rolls, A groove is formed on the outer periphery of these rolls, and the solid raw material supplied from the hopper can be supplied to the grinding chamber . By providing the dynamic flow control means (movable type), which is a roll according to the present invention, between the hopper and the grinding chamber, the vortex generated by the rotating flow in the grinding chamber is blocked (controlled), and the raw material is kept to a certain level. Vortex is prevented from occurring in the hopper filled with air, and the phenomenon of air (bubbles) is avoided. In particular, the solid raw material is supplied to the grinding chamber very smoothly and uniformly. Consumption can be reduced. Also, the surface condition (irregularity, grooves parallel to the axial direction, grooves in the rotational direction, and slanted or spiral with respect to the axis can be obtained so that the roll can grasp the solid raw material and obtain a quantitative feeding effect. A material having a groove, anti-slip or high friction function may be used.) Furthermore, since the groove is formed along the rotation direction of the outer periphery of the roll, the passage of water (liquid raw material) is improved, and only soybean (solid raw material) is moved to the grinding chamber side. In addition, in the flow control means with a movable part like this invention, supply of a solid raw material becomes accurate and the density | concentration of a ground material is stabilized. Although some components increase, the capital investment can still be reduced as compared with the prior art (FIGS. 15, 24, 26, 28, 29, 31 to 33, and FIGS. 34 (a) to (d). ), FIGS. 36 to 41 and FIG. 48).

As this invention, it can also be supposed that it has the liquid feeding control means provided in the discharge port of a submerged grinding apparatus and which feeds the ground material .
In the present invention, by providing means for controlling the flow rate and internal pressure of the ground material at the discharge port of the grinding device, liquid is provided between the grinding chamber and a part of the hopper including the flow restricting means. Filling with raw materials (or solid raw materials) can maintain submerged grinding while maintaining hermeticity.

According to the present invention, in the attrition apparatus having the liquid feed control means at the discharge port of the submerged grinding apparatus, the liquid feed control means is at least one liquid feed among a valve, a back pressure valve, and an automatic adjustment valve. Acceleration of at least one of a suppression means, a metering pump (a positive displacement pump), a centrifugal pump, a means provided with a blade or the like attached to a rotating drive member of a grinder, and a vacuum suction means It can also be one of the means which combined the means . In the present invention, as described in the previous section, in-liquid grinding can be maintained while maintaining airtightness, and when there is a discharge pressure of the grinder, only the suppression means may be used, and the suppression means and the promotion means as described below. You may combine.

  Here, liquid feeding suppression means include manual valves (ball cock, butterfly valve, etc.), valves such as back pressure valves using springs and automatic adjustment valves driven by air pressure, check valves, orifices, etc. There is no particular limitation on the use of any one or two or more in combination. The siphon type also has both functions of suppression / promotion means and can be used in a simple manner (see FIGS. 8, 37, and 38). The liquid feeding promoting means is provided with blades, grooves, etc. on a metering pump (positive displacement pump), centrifugal pump, grinding machine rotation drive member (for example, a plurality of blades welded to the outer periphery of a circular base metal of a rotating grindstone) Any one of two or more means in combination with at least one liquid feeding promoting means among the means having a pressurizing function and the decompression / suction means (dealer, vacuum pump, blower, ejector, etc.) may be used in combination. There is no particular limitation. Moreover, you may combine arbitrarily with the said suppression means. However, it is necessary to control the combination with the metering pump (positive displacement pump: rotary pump, mono pump, tubing pump, vane pump, gear pump) so that it is not completely closed during operation in order to avoid damage to the pump. Since the metering pump has a relatively high hermeticity when stopped, it can also be used as a suppression means. In addition, since the grinder rotation drive member itself has a rotational centrifugal force and has a function of discharging the grind to some extent, a back pressure valve or the like provided at the discharge port may be provided as a suppression means. A very inexpensive system can be constructed. In addition, by providing a flow rate control means at the outlet of the grinder as in the present invention, it becomes easy to realize submerged grinding, and the stability of the ability and the grinding particle size is also improved. Further, a metering pump or the like may be connected to the discharge port so that the pulverized material is sucked out (or the discharge of the pulverized material is suppressed). That is, it is not particularly limited as long as it is a valve capable of controlling a fluid (FIGS. 1, 2, 4, 5, 16, 16, 17, 18, 21, 22, 28, 36, 39, 40 and FIGS. 41 to 47).

In the submerged grinding apparatus of the present invention , the level of the raw material in the hopper into which the solid raw material and the liquid raw material are charged is detected by a liquid level sensor, and is constant by a liquid feed control means provided after the discharge port of the grinding apparatus. It is characterized by adjusting to. According to the present invention, due to a change in processing capacity due to a minute load fluctuation such as the state and supply amount of the solid raw material, the liquid raw material precedes, the solid raw material is clogged in the grinder, and temporarily shuts down or is interrupted. This can be prevented (see FIG. 2, FIG. 5, FIG. 15, FIG. 16, FIG. 17, FIG. 18, FIG. 22, FIG. 40).

The flow rate of the liquid raw material and the solid raw material in the grinding device of the present invention is detected by each raw material measuring means, or the flow rate of the ground product is detected by a flow meter provided after the outlet of the grinding device, It is characterized by being adjusted to be constant by a liquid feed control means provided after the discharge port of the grinding device. Further, according to the present invention, the flow rate of the liquid raw material and the solid raw material can be made constant by the liquid feed control means by detecting the flow rate of each of the liquid raw material and the solid raw material with a flow meter, a weight meter or the like. . Further, the flow rate of the ground material is detected by a flow meter provided after the discharge port of the grinding device , and the feed level control means provided after the discharge port of the grinding device allows the raw material level in the hopper and adjusting the constant (FIG. 14, FIG. 21, see FIG. 39).

According to the present invention, the level of the raw material in the hopper into which the liquid raw material or the solid raw material is charged is detected by a liquid level sensor, and is adjusted to be constant by controlling the rotational speed of the rotating grinding member of the grinding device. It is characterized by that. According to the present invention, the rotation speed of the grinder is changed according to the load level such as the state of the solid raw material and the supply amount and the required quality, and other means (for example, claims) as the means for adjusting the liquid level in the hopper 7 and claim 8), it is possible to prevent minute load fluctuations and temporary blockage (FIG. 16)).

According to the present invention, the flow rate of the liquid raw material or the solid raw material is detected by each raw material measuring means (flow meter or weight meter), or the flow rate of the ground material is a flow meter provided after the discharge port of the grinding device. , And by adjusting the rotational speed of the rotating grinding member of the grinding device, it is adjusted to be constant.
According to the present invention, for each of the liquid raw material and the solid raw material, the liquid raw material and the solid raw material are controlled by detecting the flow rate with a flow meter, a weight meter or the like and controlling the rotational speed of the rotating grinding member of the grinding device. The flow rate (or the flow rate of the ground product) can be made constant. Further, the flow rate of the ground product is detected by a flow meter provided after the discharge port of the grinding device, and the flow rate of the ground product is kept constant by the liquid feeding control means provided after the discharge port of the grinding device. (FIG. 17).

  According to the present invention, the level of the raw material in the hopper is detected by a liquid level sensor, and the flow rate of the liquid raw material or the solid raw material is supplied to the supply amount of the solid raw material supply device via the ratio setting device. The level of the raw material in the hopper is adjusted to be constant while the ratio of the supply amount of the raw material supply device is adjusted to be constant. According to the present invention, the ratio of the liquid raw material to the solid raw material, that is, the concentration of the solid raw material can be freely changed, and the measurement of each raw material meter is possible, which is useful for quality control. Also, even if the ratio of solid raw material to liquid raw material is constant due to fluctuations in load and grinding section conditions, the particle size of the solid raw material may change, and if there is a separation device in the subsequent process, the extraction rate will be affected. However, according to the present invention, the total flow rate or the hopper liquid level can be kept constant, the solid raw material to liquid raw material ratio can be finely adjusted, and high-quality grinding can be realized (FIG. 18).

Invention of claim 8, a submerged grinding system comprising a submerged grinding apparatus according to claim 1-7, wherein the outlet of the grinding unit is the inlet of the degassing device, a heating device It is connected to the inlet. According to the present invention, the ground product in a state where the air is not embraced by the submerged grinding device is immediately transferred to the connected defoaming device, heating device, and separation device without touching the air once. Therefore, it is possible to minimize air entrainment into the product (FIG. 4).

As this, in the present invention, by providing a restricted flow means, grinding occurs near砕室by strong vigorous swirling flow prevents the hindered that the raw material solid flows, solid raw materials are submerged Below, it can be smoothly supplied to the grinding chamber, and a continuous operation (batch operation) stable for a long time becomes possible (a typical example of a batch type submerged grinding system is shown in FIG. 5). In addition, as shown in FIG . 3, the ground material also entraps air during pulverization by arranging the pipe from the discharge port 13 at the same height as the position of the liquid raw material 103 (reference numeral 8 in FIG. 3). Disappears.

As described above, in the present invention , by setting so that the liquid raw material fills the grinding chamber and fills at least a part of the hopper, so-called submerged pulverization is realized, and the pulverized material entraps air during the pulverization. Disappears. As a result, the use of an antifoaming agent can be minimized. Here, in particular, by providing the flow restricting means between the hopper and the grinding chamber, the vortex generated by the rotation of the grinding portion is blocked, and the generation of the vortex in the hopper is prevented. As a result, the phenomenon of hindering the inflow of the solid raw material and the phenomenon of biting bubbles are avoided.

According to the present invention, conventional raw materials and equipment can be used, and a submerged grinding apparatus capable of realizing stable continuous operation and high product quality with minimal initial investment, and submerged It is possible to provide a grinding system. In addition, according to the present invention, it is not necessary to use an antifoaming agent more than necessary, especially in the production of soymilk and tofu, and further, it is compatible with non-foaming agents (part of compliance with organic agricultural products processed food standards) It is possible to provide a submerged grinding apparatus, a submerged grinding system, and a submerged grinding method that can improve the flavor and storage stability of soy milk and tofu. That is, the present invention is particularly inexpensive when pulverizing and grinding, especially preventing contact between the raw material and air to prevent the entrapment of bubbles, adding an extra antifoaming agent, eliminating the need for deaeration treatment, and inexpensive. It is possible to construct a simple and efficient system. In the case of tofu production, it is possible to use no antifoaming agent and no antifoaming agent at all (no expensive antifoaming agent can be used, which can contribute to cost reduction of tofu production). The specific gravity is high, and the liquid feeding efficiency is high in the subsequent pump conveyance. However, the antifoaming agent may be beneficial in terms of product quality as a quality improver. In that case, in the present invention, a liquid antifoaming agent is applied to any part thereafter from below the water surface in the hopper. It is possible to press fit. Since the antifoaming agent cannot be handled in a powder form, a liquid form or a powder form prepared by dispersing, dissolving, or emulsifying a powder preparation in edible oil can be used.

In addition, according to the present invention, for example, in the production of soymilk and tofu, since the air does not bite into the ground product (so-called raw kure ), heat is efficiently transferred in the subsequent heating step, and the protein has a homogeneous heat. Denaturation will occur and this will have a positive effect on the quality of the final product soymilk and tofu. For example, uneven cooking is prevented and storage stability is improved. When boiled raw Kure liquid that has a lot of foam in it is boiled at the time of boiling (expansion of bubbles), uneven cooking, etc., and can prevent adverse effects on taste and quality. In addition, the spilling of gourd liquid will not only contaminate the machinery but also cause the failure of various instruments and equipment, increasing the maintenance cost of the machinery and equipment. It is easy to fall into.

Furthermore, according to the present invention , even if the solid raw material: liquid raw material ratio is high concentration such as 1: 1 to 1: 5 or low concentration such as 1: 7 to 1:10, the air is bitten. It is possible to realize a stable supply for a long time without being inserted.

Hereinafter, submerged grinding apparatus according to the present invention, and with the submerged grinding system will be described in detail with reference to the accompanying drawings.

(First embodiment)
The basic configuration of the submerged grinding apparatus of the present invention includes a hopper into which a solid raw material and a liquid raw material are charged, and a grinding chamber for grinding the solid raw material together with the liquid raw material in a grinding unit. FIG. 1 shows a submerged grinding apparatus 2, and in this example, a flow restricting means S is attached so as to be connected to a raw material supply port 3 provided above the vertical submerged grinding apparatus 2. It has been. 2 and 3 to 7 show an example of a submerged grinding system using the submerged grinding device 2 having the flow control means S. In FIG. 5, a liquid level sensor provided in the hopper 5 is shown. Based on the liquid level of the liquid raw material 8 detected by the controller 10, the controller 33 and the inverter 34 control the rotational speed (flow rate) of the pump 14, and the liquid level of the liquid raw material 8 in the hopper 5 is kept constant. I am doing so. In FIG. 1 to FIG. 5, the flow restricting means S is rotatably supported by biaxial rolls (feed rolls) 23, 24 facing the inside of the transfer pipe Pi, and the solid raw material 6 is interposed between the feed rolls 23, 24. In this example, the clearance is moderately wide without being coarsely pulverized in advance, and is supplied into the grinding device 2. However, as the flow restricting means S and 107, those described later can be applied. . FIG. 6 and FIG. 7 show examples of static flow control means. In either case, the solid material and the liquid material can be uniformly fed into the grinding chamber 12 while preventing the strong vortex U generated in the raw material supply port 3 of the grinding machine.

  The hopper 5 is not particularly limited as long as a solid raw material and a liquid raw material are input. The hopper 5 is provided with a liquid material introduction pipe 9 for introducing the liquid material 8 on the bottom side of the hopper (below the water surface of the liquid material 8). The liquid raw material 8 supplied to the hopper 5 is charged into the submerged grinding apparatus 2 from the raw material supply port 3 together with the solid raw material 6 from the hopper 5.

  The hopper 5 is provided with a liquid level sensor 10 that detects the liquid level of the liquid raw material 8 in the hopper 5. As will be described later, submerged grinding is performed in the submerged grinding apparatus 2, but at this time, if the liquid level of the liquid raw material 8 is too low in the hopper 5, the raw material supplied to the submerged grinding apparatus 2. There is a risk of air getting inside. Therefore, the liquid level sensor 10 monitors the liquid level of the liquid raw material 8 to prevent air from entering. As the liquid level sensor 10, an arbitrary sensor such as a pressure sensor, a magnetostrictive sensor, a float sensor, an ultrasonic sensor, a laser sensor, a radar wave sensor, or a plurality of electrodes can be used. For the adjustment of the liquid level, for example, a signal from the liquid level sensor 10 is input to the controller, and on-off control or PID control is performed on a flow rate control device such as a pump or a valve provided at a drain outlet described later. The level of the solid raw material can also be controlled using a level sensor in the same manner, which is effective. The rotational speed of the rotating grindstone 11b of the submerged grinding apparatus 2, the control valve on the discharge side, and the rotational speed of the pump can be adjusted manually, or the speed can be automatically changed to balance the solid raw material 6 and the liquid raw material 8 at a delicate level. Can also be adjusted.

  On the other hand, the submerged grinding apparatus 2 has a grinding chamber 12 equipped with a mortar-shaped grindstone (grinding unit) 11 for grinding the supplied (input) solid raw material 6. Grind into a slurry. The submerged grinding apparatus 2 employs a vertical structure in the example shown in FIG. 1, but is not limited thereto, and may be a submerged grinding apparatus having a horizontal structure (see FIG. 8). However, when the vertical structure is adopted, the installation space is smaller, but there is a risk of leakage due to seal leakage. The horizontal structure is preferable because it is easy to obtain grinding conditions in the liquid, has a low apparatus height, and is easy to perform maintenance such as cleaning and motor replacement.

  In the submerged grinding apparatus 2, for example, if the raw material supply port 3 and the discharge port 13 are closed, the grinding chamber 12 is required to have an airtight and leak-free structure. Applicable. By combining such an airtight structure of the submerged grinding apparatus 2 and the flow control means S, submerged pulverization can be realized stably, and mixing of air can be sufficiently suppressed.

  Although the submerged grinding apparatus 2 in the present invention is premised on continuous operation, it can also be applied to batch operation or batch continuous operation. During operation of the submerged grinding apparatus 2 in the present invention, the liquid raw material 8 and the solid raw material 6 are metered at a constant flow rate, and the clearance (adjusted and fixed at the beginning of operation) of the grinding apparatus 2 is constant and constant. For example, during continuous operation for several hours to about a day to several months, it is sufficiently stable throughout.

  The grindstone 11 provided in the grinding chamber 12 of the submerged grinding apparatus 2 is composed of, for example, a fixed grindstone 11a and a rotating grindstone 11b, and the fixed grindstone 11a and the rotating grindstone 11b from a hole 11c provided in the center of the fixed grindstone 11a. In between, the solid raw material 6 is introduced and ground. As the fixed grindstone 11a and the rotating grindstone 11b, any grindstone such as a metal grindstone, a ceramic grindstone, or a porous grindstone can be used. It is preferable that it is made of a non-permeable material so as not to penetrate. This is because when the fixed whetstone 11a and the rotating whetstone 11b are porous and have water permeability and water permeability, the fixed whetstone 11a and the rotating whetstone 11b are made into the liquid raw material 8 by the centrifugal force or internal pressure of the rotating whetstone 11a during grinding. This is because the balance between the solid raw material 6 and the liquid raw material 8 may be lost. By constituting the fixed grindstone 11a and the rotating grindstone 11b with a non-permeable material, it is possible to prevent the balance from being lost.

  Accordingly, as the material of the fixed grindstone 11a and the rotating grindstone 11b, a natural stone such as stainless steel, metal, diamond or alumina, a grindstone impregnated by impregnating a porous grindstone with resin, ceramic or the like is suitable. . When the impregnation is performed by the impregnation, the impregnation method includes, for example, impregnating a porous grindstone with a liquid resin or the like under reduced pressure, and curing it by sintering and heating (for example, about room temperature to 2000 ° C.). . As resin to be used, polypropylene resin (PP), polyethylene resin (PE), low density polyethylene (LDPE), high density polyethylene (HDPE), polycarbonate resin, polyvinyl chloride resin (PVC), vinylidene chloride resin (PVDC), Polyethylene terephthalate resin (PET), fluororesin, acrylic resin, methacrylic resin, polyamide resin (PA), silicone resin, epoxy resin, urethane resin, melamine resin (MF), phenol resin (PF), urea resin (UF), ABS Resin, polyacetal resin, polybutylene terephthalate resin, polyethersulfone resin, polyimide resin, polyetherketone resin, polysulfone resin, polyphenylene sulfide resin, polyetherimide resin, oxybenzol polyol Can be used by selecting from biodegradable plastics such as ester resin and polylactic acid resin, natural rubber, synthetic rubber, etc., especially when the object to be ground is food. It is necessary to use a resin.

  In the submerged grinding device 2 described above, particularly when continuously operating in a batch operation (when the batch is continuous), it is necessary to seal the discharge port 13 side and to block the entry of air at a minimum. For example, if the intrusion of air is allowed without sealing the outlet 13, bubbles may be generated during grinding in the grinding chamber 12. On the other hand, as shown in FIG. 2, by connecting the centrifugal pump 14 while sealing the slurry outlet 13, connecting a valve 15 such as a control valve downstream thereof, and cutting the air intrusion route, The hopper 5 to the centrifugal pump 14 and the valve 15 are filled with the liquid raw material 8, so that air does not enter and pulverization in the liquid is realized.

  The means for sealing the discharge port 13 of the submerged grinding device 2 is not limited to the valve 15, and simple means include a back pressure valve 15 as shown in FIG. 8 and a siphon as shown in FIG. It is also possible to make it 16 or the like.

  Alternatively, the flow rate connected to the outlet 13 of the submerged grinding apparatus 2 for the purpose of grinding in the liquid while keeping the ratio of the solid raw material 6 and the liquid raw material 8 constant and stable even in continuous operation. You may make it adjust the liquid level in the said hopper 5 uniformly by a control apparatus. In this case, a simple device such as a ball cock, a valve such as a butterfly valve, or an orifice may be used as the liquid feeding flow rate control device. Preferably, a self-priming positive displacement pump (rotary pump, gear pump, vane pump, tube pump, Mono pump, etc.) is provided, and the rotation speed of the pump (based on the detection signal of the liquid level sensor 10 provided in the hopper 5 ( Suction amount) and valve opening are controlled.

  When the control is performed, when the subsequent process is, for example, a process using a continuous boiling apparatus, the boiling time and concentration slightly vary, but the effect of in-liquid grinding is emphasized. In the case of a batch-type boiling apparatus, there is no problem if only one batch is mixed and the ratio becomes the whole ratio. In addition to the flow rate control, the liquid feeding flow rate control device is used for discharging air in the grinding chamber 12 and filling the slurry in the initial stage of operation.

  By providing the liquid feed control means that can adjust the suction amount of the volume pump in conjunction with the liquid level in the hopper 5 as described above, the suction amount of the volume pump is too much or too little. It is possible to prevent the liquid level from being excessively lowered or overflowing. As a result, stable operation can be performed.

  In the flow control means S having the above-described configuration and the submerged grinding apparatus 2 including the same, a strong pushing device is not required for the raw material supply port 3 of the submerged grinding apparatus 2, and the solid raw material is press-fitted. There is no worry of obstruction due to. Even if the liquid raw material is less than the solid raw material, there is no need for a special pump or pushing-in device on the supply side, and there is only a simple feed function for sending only the solid raw material. A simple and inexpensive device that communicates freely can be used. There is no need for a highly accurate pump (high sealing performance, which can hold the liquid material even when stationary), such as a commercially available rotary pump or Mono pump.

  The configurations of the flow restricting means and the submerged grinding apparatus of the present invention are not limited to those described above, and various modifications can be made. Then, next, various forms of the flow control means and submerged grinding apparatus to which the present invention is applied will be described.

  FIGS. 9 to 13 show a flow restriction between the supply of the solid raw material 6 (which may include liquid raw material) and the liquid raw material 8 supplied by the hopper 5 to the raw material supply port 3. This is an example in which means S is provided. The provision of the flow control means S eliminates the phenomenon that the vortex generated by the rotation of the grindstone and the crushing blades in the grinding chamber of the submerged grinding device prevents the inflow of the solid raw material and the phenomenon of biting air. can do. The flow control means S is, for example, means S1 for providing one to a plurality of flat plates in the vicinity of the supply port (in the liquid) of the grinding device (FIG. 9), and means S2 for providing a swirl preventer combining two flat plates in a cross shape (FIG. 10), means S3 for providing a spiral in the pipe (FIG. 11), means S4 for meandering the pipe (FIG. 12), and means for narrowly configuring the portion from the hopper to the supply port so that the solid raw material 6 can sufficiently pass therethrough. S5 (FIG. 13) and the like are not limited thereto. As described above, the grinding chamber 12 has an airtight structure and includes a transfer pipe Pi for transferring the solid raw material 6 and the liquid raw material 8 in the hopper 5 to the grinding device 2, and the inside of the transfer pipe Pi Provided with the above-mentioned flow control means (the flow of the solid raw material or the liquid raw material is not hindered to the minimum) S (and reference numeral 107 described later) between the hopper lower opening and the transfer pipe Pi. Yes.

  Here, the flow restricting means S (and reference numeral 107 described later) is affected by the vortex state in the machine affecting the raw material (liquid / solid raw material 6) on the hopper 5 communicating from the supply port, and particularly the raw material is co-rotated. A liquid / solid raw material that is used as a raw material in the machine that is in a vortex flow state by controlling the vortex flow and preventing it from becoming difficult to enter the downward supply port. Can be uniformly and stably supplied for a long time without separation. In particular, a relatively high concentration raw material in which the solid raw material 6 and the liquid raw material are 1: 1 in volume ratio can be applied. In addition, a metering pump or a solid raw material feeding device similar to the metering pump has a merit that a metering pump with high accuracy and high discharge pressure is not necessary. It is sufficient if the solid material 6 can be smoothly transported, and the liquid material is not required to be transported with particularly high precision, and may have a simple structure. That is, solid raw materials are used (supplied) in an auxiliary manner, such as fixed flow control means that mainly uses gravity acting on the raw material in the hopper and a biaxial roll type feeding device. In order to smoothly supply to the supply port of the grinding device 2 (where a strong vortex is generated), the generated vortex is not affected even by the raw material in the hopper, and the biaxial roll is cut in an edge shape. In some cases (not coarsely pulverized; may cause deterioration of the quality of the solid raw material), the roll is formed with a depression, and the solid raw material is fed from the upper hopper to the lower milling device supply port. It is transported smoothly. Moreover, as shown in FIG. 12, the deformation | transformation on piping and the form which removes the central axis of a vortex | eddy_current can be taken.

FIG. 14 shows another example of the submerged grinding system. As described above, the configuration of the flow restricting means S and the submerged grinding apparatus 2 is the same as that shown in FIG. 1 and includes the flow restricting means S and the hopper 5, and the submerged grinding apparatus 2 includes the fixed grindstone 11a and the rotating grinder. A grindstone 11b is provided. In FIG. 14, a motor 31 for rotating the rotary grindstone 11b is shown.
FIG. 15 is an example in which the solid raw material 6 is appropriately coarsely ground and supplied into the grinding device 2 without coarsely pulverizing the solid raw material 6 in advance between the opposing biaxial roll type flow control means 23 and 24. is there. In the present invention, the gap between rolls or between the roll and the vessel wall is adjusted slightly or narrower than the particle size of the solid raw material. Due to the adjustment range and the elasticity characteristics of the solid raw material, the pulverization hardly occurs, and it is possible to exert a quantitative function in which the solid raw material is directly bitten and fed into the hopper. In the case of the biaxial roll type, it is easier to obtain a quantitative effect when the number of rotations is the same. For example, for pickled soybeans that have absorbed water, depending on the particle size, if not so large, pickled soybeans with a minimum diameter of 10 mm or less have a flow control effect with a feed function without coarse grinding at 2 mm or more and 10 mm or less. Demonstrate (FIG. 47).

  A flow meter 32 is installed at a downstream position of the pump 14, and a controller 33 and an inverter 34 that control the rotation speed (flow rate) of the pump 14 based on the flow rate measured by the flow meter 32 are provided. Yes. Here, when a valve is provided instead of the pump 14, the inverter 34 can be omitted, and the opening degree of the valve is adjusted by the controller 33. Instead of the pump 14, it is possible to provide liquid feeding control means such as a valve, a back pressure valve, a control valve, a centrifugal pump, and a means for adding a centrifugal pump function to the grinder rotating body. That is, even if it is not a metering pump as described in the conventional patent document 5, it is possible to perform submerged grinding by using the liquid feeding control means.

In the present invention, the liquid raw material is at least one selected from water, hot water, hot water, pressurized hot water, beverages, liquid oil, emulsifiers, organic solvents, and liquid foods.
The solid raw material 6 is at least one selected from, for example, cereals, beans (soybeans, red beans, etc.), vegetables, fruits, tea leaves, medicinal herbs, and is not limited to these, and also includes wet solids. It may be coarsely pulverized separately in advance at 1 to 100%.

Examples of the liquid raw material 8 include water, beverages, liquid oils, emulsifiers, organic solvents, liquid foods and water, cold water (0 to 15 ° C.), warm water (15 to 60 ° C.), hot water (60 to 100). ° C), acidic water containing organic acids such as citric acid and ascorbic acid (vitamin C), alkaline water such as sodium hydroxide and sodium carbonate, various salt solutions including sodium chloride and sodium ascorbate, soft water, tap water Water, groundwater, seawater (diluted product), deep ocean water (demineralized product, etc.) and their deaeration or deoxygenation treatment, demetallized ion treatment (eg cation exchange resin treatment, anion exchange resin treatment, reverse) However, it is not limited to those obtained by osmotic membrane treatment, alkaline ionized water, acidic ionized water, distilled water and the like. Beverages and liquid foods include soy milk, milk, fruit juice drinks, solutions containing protein and sugar, soy beans, soy milk, goat juice, okara and tofu cake, etc. Liquid (slurry), such as vinegar, soy sauce, sauce, liquor, etc., but is not limited thereto. Liquid oil is an edible oil such as soybean oil or rapeseed oil (salad oil, white squeezed oil, or oil containing vitamin E), and an emulsifier is a liquid oil having a melting point below the grinding temperature. In addition, a liquid containing an inorganic salt such as sodium chloride, sodium sulfate, or potassium chloride may be effective. If the solid raw material 6 is sesame, peanut, or a roasted product thereof, a paste-like kneaded sesame can be obtained by using liquid cooking oil (low melting point), etc. Or peanut paste. Various liquid substances can be used as long as they are not edible. In some cases, organic compounds other than water (ethanol aqueous solution, shochu, alcohol, etc.) can also be used. The liquid raw material 8 is not limited to these.

  Products that can use the present invention are soy milk, tofu, and deep-fried food when the solid material is soybean. For example, for soy milk, adjusted soy milk, soy milk drink, soy milk jelly, soy milk ice cream, soy milk yogurt, etc., for tofu, silk tofu (silk tofu), filled tofu, cotton tofu, jelly tofu, etc. Tofu (including frozen products), deep-fried, fresh-fried, thin-fried, deep-fried sushi, fried sushi, tofu steak, tofu hamburger and other dough (including frozen semi-finished products), frozen tofu and dough before and after freezing, If it is deep-fried, it is effectively applied to soy-processed foods such as deep-fried sushi, deep-fried, fresh-fried, light-fried, deep-fried tofu, soy sauce, yuba tofu, soy protein gel / soy milk yogurt, soy milk jelly, soy flower, etc. The The raw material soybean may be domestic soybean, imported soybean, soaked soybean, or non-soaked soybean. In addition, it includes lipoxygenase gene-deficient varieties, moulted soybeans, pressure-biased soybeans, raw soybean flour, rough soybeans, separated soybean protein, concentrated soybean protein, and the like. Needless to say, the present invention is not limited to these.

  Further, at the time of grinding, liquid level control is important, and in this system as well, the pump 14 is connected while the discharge port 13 is sealed to cut off the intrusion of air. Further, the controller 33 and the inverter 34 control the rotation speed (flow rate) of the pump 14 based on the flow rate measured by the flow meter 32 so that the liquid level of the liquid raw material 8 in the hopper 5 is kept constant. ing.

  By these, the whole path | route from the hopper 5 to the pump 14 will be filled with the liquid raw material 8, and it will be what is called in-liquid grinding | pulverization. Furthermore, since the rotational speed of the pump 14 is controlled so that the flow rate becomes appropriate, the submerged pulverization can be performed stably.

FIG. 15 shows another example of the submerged grinding system. The submerged grinding system of this example also basically has the same configuration as the example shown in FIG. 14, but is based on the liquid level of the liquid raw material 8 detected by the liquid level sensor 10 provided in the hopper 5. Thus, the rotation speed (flow rate) of the pump 14 is controlled by the controller 33 and the inverter 34 so that the liquid level of the liquid raw material 8 in the hopper 5 is kept constant.

  By adjusting the suction amount of the pump 14 in conjunction with the liquid level in the hopper 5 as in this example, the suction amount of the pump 14 is too much or too little, and the liquid level in the hopper 5 is lowered. It is possible to prevent the liquid raw material 8 from overflowing from the hopper 5. As a result, the liquid can be stably pulverized.

  FIG. 16 shows another example of the submerged grinding system. In this example, the pump 14 is a positive displacement pump, and the supply amount of the solid raw material 6 and the liquid raw material 8 is appropriately controlled. In place of the positive displacement pump, a control valve that operates by an external signal, a back pressure control valve, or the like can be used.

  Here, the solid raw material 6 is weighed by the weighing machine 41 and supplied to the flow restricting means 107. The supply amount of the solid raw material 6 in the weighing machine 41 is controlled by the inverter 42. On the other hand, the liquid raw material 8 is supplied from the liquid raw material 8 in the raw material tank 43 to the hopper 5 via the pump 44, the valve 45, and the flow meter 46. The valve 45 is provided with a controller 47, which is controlled based on the measurement result in the flow meter 46 so as to have an appropriate opening degree.

  The motor 31 that rotationally drives the rotating grindstone 11b of the submerged grinding apparatus 2 is provided with a controller 48 and an inverter 49, and the number of rotations is controlled based on the detection result by the liquid level sensor 10. . By these mechanisms, the solid raw material 6 and the liquid raw material 8 are stably supplied, and the grinding speed is adjusted according to the supply amount, so that the liquid pulverization is stably performed.

  FIG. 17 shows another example of the submerged grinding system. In this example, the pump 14 is a positive displacement pump, and the supply ratio of the solid raw material 6 and the liquid raw material 8 is appropriately controlled. Also in the case of this example, instead of the positive displacement pump, liquid supply control means such as a control valve that operates in response to an external signal or a back pressure adjustment valve can be used. The grinding device 2 includes a blade (blade having pressure, an impeller such as a centrifugal pump) on the rotating grindstone side, and a liquid feed control means connected to the discharge port of the submerged grinding device 2 is a valve. A back pressure valve or a combination of two or more of a regulating valve, and the back pressure valve adjusts the opening by a spring having an appropriate spring constant, or, in the case of an electric regulating valve or a pneumatic regulating valve, an outlet of a grinding device By detecting a slight change in the internal pressure with a pressure sensor and adjusting the opening, it is possible to adjust the overall average flow rate to be substantially constant while performing fine adjustment.

  Also in this system (FIG. 16, FIG. 17), the supply amount of the solid raw material 6 is measured by the weighing machine 41 and supplied to the hopper 5. The liquid raw material 8 is also supplied from the liquid raw material 8 in the raw material tank 43 to the hopper 5 via the pump 44, the valve 45, and the flow meter 46. Here, the weighing machine 41 for weighing the solid raw material 6 is driven by a motor 51, and the rotation speed of the motor 51 is controlled by an inverter 42 based on a measured value per time obtained in advance. The valve 45 for adjusting the supply amount of the liquid raw material 8 is provided with a controller 47 and controlled so as to have an appropriate opening based on the measurement result in the flow meter 46.

  Further, as shown in FIG. 18, the submerged grinding system of this example is provided with a ratio setting device 55 for controlling the ratio of the solid raw material 6 and the liquid raw material 8 to be appropriate, and its controller 56. . Based on the detection signal from the liquid level sensor 10, the ratio setter 55 is controlled by the controller 56, and this ratio setter 55 further controls the controller 53 for the solid material 6 and the controller 47 for the liquid material 8. Thus, the ratio of the solid raw material 6 and the liquid raw material 8 is controlled to be constant and appropriate. As a result, not only stable pulverization in liquid but also uniform slurry can be produced. In addition, the rotation speed of the attritor motor 31 can be controlled via the controller 53 and the inverter 49 in accordance with the change in the flow rate of the attrition measured by the flow meter.

  In the submerged grinding system, it is possible to continuously perform a series of steps by continuously operating the above-mentioned submerged grinding device and connecting its outlet to the inlet of the defoaming device. It is. Grinding treatment by connecting grinding treatment liquid (slurry, paste, emulsion, etc.) to the discharge port of the continuously operated submerged grinding device and connecting it to the defoaming device in the next process without touching the air. It is possible to effectively suppress and reduce liquid alteration. The defoaming apparatus may be either a continuous type or a batch type, but the continuous type is more reasonable and desirable as a system. That is, it has good cleanability in place (CIP) and is suitable for mass production.

  The connection may be any connection means, and is not particularly limited. However, it is desirable that the connection be airtight. As shown in FIG. 3, when the tank is once received before being released, the air is slightly touched or first-in first-out is insufficient. Therefore, although there is a submerged grinding effect, it is reduced.

Alternatively, it is also possible to operate the submerged grinding device intermittently and connect its outlet to the inlet of the defoaming device. By connecting the grinding treatment liquid (slurry, paste, emulsion, etc.) to the outlet of the defoaming device in the next step without letting it come into contact with the air at the outlet of the submerged grinding device operated intermittently In addition, it is possible to effectively suppress or reduce the alteration of the grinding treatment liquid. The defoaming apparatus may be either a continuous type or a batch type, but in the present invention, the batch type is preferable as a system. That is, it is suitable for small-scale or small-quantity, multi-product production.

  Compared to the continuous operation, there is a risk of alteration of the grinding treatment liquid staying in the grinding chamber 12 or the hopper 5 during the stop, but the submerged grinding device 2 is airtight and is always polished with a liquid raw material. By using the crushing chamber 12 so as to replace it, it is possible to suppress the reduction of the submerged grinding effect. Since the grinding treatment liquid is in a state where alteration is very likely to occur compared to before grinding, airtight connection is important in maintaining the effect of submerged grinding. Since the grinding treatment liquid is in an unstable state as compared to before grinding, an airtight structure is important in maintaining the effect of the grinding in the liquid. Furthermore, when the next process is a defoaming device, it is possible to remove slightly entrained bubbles and dissolved air.

  With the above submerged grinding system, for example, when grinding soybeans, vegetables, fruits and medicinal herbs, water is used as ground water, and by submerged grinding, soy beans, vegetables (including root vegetables), Processed products made from fruits and medicinal herbs (herbs, herbal medicines, etc.) are made to contain air bubbles and improve their appearance. Glossy smooth sesame paste (kneaded sesame) and peanut paste that do not contain air bubbles can be obtained by performing submerged grinding using sesame or peanut as a solid raw material and liquid edible oil as a liquid raw material.

(Second Embodiment)
As in the submerged grinding apparatus of the previous embodiment, the submerged grinding apparatus 101 of the present embodiment is installed at a raw material supply port, and a hopper 104 for introducing the solid raw material 102 and the liquid raw material 103, and the hopper 104 A grinding chamber 106 provided with a mortar-shaped grindstone (grinding part) 105 for grinding the solid raw material 102 supplied (input) from the motor, and a motor 31 for rotating the grindstone 105. As shown in FIG. 18, it is a great feature that a flow restricting means 107 is further provided between the hopper 104 and the grinding chamber 106. In the submerged grinding system shown in FIG. 18, the raw material level in the hopper 5 is detected by the liquid level sensor 10, and the signal of the flow meter (weigh scale) 46 of the liquid raw material 8 or the solid raw material 6 is sent to the ratio setting device 55. The solid raw material 6 and the liquid raw material 8 are charged while adjusting so that the ratio of the supply amount of the solid raw material 6 and the supply amount of the supply device 43 of the liquid raw material 8 is kept constant (or finely adjusted). The level of the raw material in the hopper 5 to be stored is adjusted to be constant.

  For example, as shown in FIGS. 19, 20 (a), 20 (b), and (c), the flow restricting means 107 has a shape that enlarges the flow path in an annular shape, and the fluid is arranged near the center A plurality (six in this example) of blades 107b are radially attached so as to partition the annular flow path to 107a. The separation fluid 107a is not particularly limited in shape as long as it has a function of blocking the lower vortex flow and branching the raw material inflow path from above, such as a piece shape, a block shape, a block shape, a cone shape, a polygonal pyramid shape, etc. . The cross section of the flow path can be a circular, circular, or triangular, square, or polygonal flow path. The flow path partition plate is not particularly limited as long as it has the function described above, and the arrangement and the number of the flow path partition plates in a lattice shape, a parallel shape, etc., in addition to the radial shape.

  In the submerged grinding apparatus 101, when the liquid raw material 103 fills the grinding chamber 106 and fills at least a part of the hopper 104 and performs so-called submerged grinding, for example, FIG. 6 to FIG. Further, as shown in FIG. 19, if the flow restricting means 107 is not provided, the liquid level is affected by the vortex U generated by the rotation of the grindstone 105 in the grinding chamber 106, and the solid raw material 102 and When supplying the liquid raw material 103 into the grinding chamber 106, there is a high possibility that air will be involved. Therefore, the ground product also bites the foam, which may adversely affect the product quality.

  On the other hand, by providing the flow restricting means 107 as described above, it is possible to eliminate the influence of the vortex, and it is possible to avoid deterioration of product quality due to air entrainment. Specifically, when the flow restricting means 107 having the above structure is provided, the vortex generated by the rotation of the grindstone 105 is blocked by the six blades 107b and does not reach the hopper 104. For this reason, the liquid surface of the liquid raw material 103 in the hopper 104 is not affected by the vortex, and a gentle state is maintained. Therefore, air is not involved in the raw material supply, and the product quality does not include air.

  Moreover, in the case of the said flow control means 107, the drive means (for example, movable means, such as a motor) for the said flow control means 107 is not required at all. Therefore, it is possible to obtain a sufficient effect with a simple apparatus configuration without increasing power consumption and the like.

  FIG. 21 shows an example of a submerged grinding system provided with the control means 107 described above. The submerged grinding apparatus 101 has the same configuration as that shown in FIG. 18, and the submerged grinding apparatus 101 includes a hopper 104 and a grindstone 105. A flow meter 108 is installed at a downstream position of the pump P, and a controller 109 and an inverter 110 for controlling the rotation speed (flow rate) of the pump P based on the flow rate measured by the flow meter 108 are provided. Yes. When a valve is provided in place of the pump P, the inverter 110 can be omitted, and the opening degree of the valve is adjusted by the controller 109.

  FIG. 22 shows a second example of the submerged grinding system. The submerged grinding system of this example also basically has the same configuration as the example shown in FIG. 20, but based on the liquid level of the liquid raw material 103 detected by the liquid level sensor 111 provided in the hopper 104. Thus, the rotation speed (flow rate) of the pump P is controlled by the controller 109 and the inverter 110 so that the liquid level of the liquid raw material 103 in the hopper 104 is kept constant. By adjusting the suction amount of the pump P in conjunction with the liquid level in the hopper 104 as in this example, the suction amount of the pump P is too much or too little, and the liquid level of the hopper 104 is lowered. On the contrary, the liquid raw material 103 can be prevented from overflowing from the hopper 104. As a result, the liquid can be stably pulverized.

  The configuration of the flow restricting means 107 is not limited to the above example, and various changes can be made. 23 to 27 show other examples of the flow restricting means 107. FIG. 23 shows an example in which the solid raw material 102 supplied from the hopper 104 is alternately distributed by a pair of impellers 107 c and supplied to the grinding chamber 106. In the case of this example, the solid raw material 102 is distributed in a substantially constant amount by each impeller 107c, and is further restricted by the two impellers 107, so that a smooth raw material supply is possible. Further, the presence of the impeller 107c blocks a vortex generated by the rotation of the grindstone 105, and does not entrain air when supplying the raw material.

  FIG. 24 shows an example in which the raw materials (solid raw material 102 and liquid raw material 103) pass between the belts 107e stretched between the rollers 107d. By allowing the raw material to pass through the gap between the belts 107e, the solid raw material 102 can be quantitatively supplied to the grinding chamber 106, and the solid raw material 102 is not excessively supplied. Further, the vortex generated by the rotation of the grindstone 105 does not reach the hopper 104 through the gap between the belts 107e.

In the example shown in FIG. 25, the flow restricting means 107 is constituted by a wide slit 107f and a circulation pump 107g. FIG. 25B is a view of FIG. 25A viewed from the direction of the arrow. In this example, the flow from the hopper 104 toward the grinding chamber 106 is forcibly formed by the circulation pump 107g, and thereby the flow of the raw material and the interruption of the vortex generated by the rotation of the grindstone 105 are realized. .

  FIG. 26 is similar to the example shown in FIG. 23, and the solid raw material 102 is distributed to a substantially constant amount by a combination of a pair of cams 107 h and smoothly supplied to the grinding chamber 106. Also in this example, due to the presence of the cam 107h, the vortex generated by the rotation of the grindstone 105 is blocked, and air is not involved when supplying the raw material.

  FIG. 27 shows an example in which the raw material supply is stably performed by the charging mechanism 112 installed on the hopper 104 and the conveyor 107 i as the flow restricting means 107. The charging mechanism 112 includes an impeller 112a that divides and feeds the solid raw material 102 by a predetermined amount. The solid raw material 102 that is dividedly charged into the hopper 104 is partitioned by blades 107j provided on the conveyor 107i. One after another is sent to the grinding chamber 106 through the compartment. Also in this example, the vortex generated by the rotation of the grindstone 105 is blocked by the blades 107j of the conveyor 107i, so that air is not involved when the raw material is supplied.

  The flow restricting means 107 is not only intended to restrict the flow as in each of the above examples, but may also have a function as a feed means for coarsely crushing the solid raw material 102 in advance. Is a secondary contribution of the present invention but is not as effective as recited in the claims. Hereinafter, an example in which a feeding unit is provided as a flow restricting unit will be described.

  FIG. 28 shows an example in which the biaxial to multi-axial roll type feeding means 113 is installed, and the submerged grinding apparatus of this example is installed at the raw material supply port and inputs the solid raw material 102 and the liquid raw material 103. A hopper 104 for grinding, a grinding chamber 106 provided with a stone-like grindstone (grinding unit) 105 for grinding the solid raw material 102 supplied (input) from the hopper 104, and a hopper 104 and a grinding chamber 106. The solid material 102 provided between them is configured in advance from a biaxial to multiaxial roll type feeding means 113. Basically, in the present invention, there is one grinding device. With this configuration, the supplied solid raw material 102 is pulverized in the liquid in a single stage by the grindstone 105 (fixed grindstone 105a and rotary grindstone 105b) in the grinding chamber 106 by the biaxial to multiaxial roll type feeding means 113. A slurry-like ground product is obtained.

The feeding means 113 is provided in the vicinity of the raw material supply port (in the liquid) of the submerged grinding apparatus 101, and is, for example, one of means for configuring the portion from the hopper 104 to the supply port so narrow that the solid raw material can sufficiently pass therethrough. The biaxial roll type feeding means is used. In this biaxial to multi-axial roll type feeding means, a pair of rolls 113a and 113b are arranged to face each other, and the respective rolls 113a and 113b rotate in opposite directions so as to bite the solid material 102 through the gap. . In addition, it is effective to apply surface treatments such as irregularities, gears, and notches to each of the rolls 113a and 113b so as to bite the solid material 102 (FIGS. 34A, 34B, and 34C). (D) ) .

  In the feeding means (two-axis to multi-axis roll type feeding means) 113, the gaps between the rolls 113a and 113b and between the rolls 113a and 113b and the vessel wall are adjusted slightly narrower than the particle size of the solid raw material 102. . Due to the adjustment width and the elasticity characteristics of the solid raw material 102, the pulverization hardly occurs, and it is possible to exert a quantitative function of biting the solid raw material 102 as it is and feeding it to the grinding chamber 106. For example, pickled soybeans that have absorbed water are elastic to some extent, and the gap between the cam and the casing does not necessarily require airtightness, and in particular has a function of feeding a solid material rather than a liquid material. By appropriately adjusting the gap between the rolls, the solid raw material 102 can be quantitatively pushed into the grinding chamber 106 with almost no pulverization. For example, pickled soybeans that have absorbed water are elastic to some extent, and the solid raw material 102 can be quantitatively pushed into the grinding chamber 106 with almost no pulverization by appropriately adjusting the space between the rolls slightly narrower than the size. is there.

  Further, for example, a single-roll type feed unit 113c as shown in FIG. 29 or a feed blade 113d having radial blades as shown in FIG. 30 may be used. Moreover, as shown in FIGS. 31-33, the structure which combined the roll 113a-113d of 3 axes | shafts or more may be sufficient. Furthermore, as shown in FIG. 34, the roll has a surface state (solid surface, groove parallel to the axial direction, slanted or spiral groove with respect to the axis, anti-slip and high friction function) It may be desirable to use a material having a helical structure (FIGS. 34 (a) and 34 (c)), and have a spiral system asperity (FIG. 34 (b)). )), Etc. In any case, by providing the biaxial to multiaxial roll type feeding means 113, a quantitative feed (pushing) effect of the solid raw material can be obtained, and the grindstone in the grinding chamber 106 of the submerged grinding apparatus 101. And the phenomenon of hindering the inflow of the solid raw material 102 due to the vortex generated by the rotation of the crushing blades and the like, and the phenomenon of biting air can be suppressed. Further, it is preferable that a groove mm is formed in the rotation direction of the outer periphery of the feeding means 113 (FIG. 34 (d)). As this groove mm, the cross-sectional shape is a square, U-shape, V-groove, etc., but it has a groove mm through which water (liquid raw material) can flow freely, improving the passage of water (liquid raw material), Only soybeans (solid raw materials) can be moved to the grinding chamber. Further, as shown in FIG. 48, a scraping member mb for removing the solid material adhering to (caught in) the groove mm is disposed on the grinding chamber side, and when the rotor rotates and returns to the hopper side, the groove mm It is configured to remove the beans and skins sandwiched between them with something like comb teeth. With such a configuration, only soybean (solid raw material) can be efficiently fed into the grinding chamber. As a result of the experiment, it became possible to reduce the ratio of water (liquid raw material) to 1: 0.7 in the volume ratio of soaked soybeans and water. In the case of soaked soybeans, the calculation (theoretical) can be up to 1: 0.55. And it is applicable to the roll rotation system of FIGS.

  The material of the roll is not particularly limited, and may be natural stone such as igneous rock, grinder grindstone (preferably non-permeable material), metal, ceramic, resin or the like. Examples of the metal include stainless steel such as SUS304 and SUS316, titanium, and aluminum, but are not particularly limited.

Further, the biaxial to multiaxial roll type feeding means 113 may be a screw type as shown in FIG. 35, and unlike a simple conveying screw, a spiral blade in a direction opposite to the feeding direction is partially provided on the rotating shaft. A shape provided with 113i (FIG. 35C ) or the like can be employed.

  In each of the above-described examples, for example, a vertical structure is adopted as shown in FIG. 28, but the present invention is not limited to this. For example, a submerged grinding apparatus having a horizontal structure as shown in FIG. FIG. 8). The installation space is smaller when the vertical structure is adopted. The horizontal structure is advantageous in that it is easy to obtain submerged grinding conditions and easy maintenance such as motor replacement.

  In the above-mentioned submerged grinding apparatus, for example, if the raw material supply port and the discharge port are closed, the grinding chamber 106 is required to have an airtight and leak-free structure, but it is applicable even if there is some leakage. Is possible. By combining the airtight structure of such a submerged grinding apparatus and the biaxial to multiaxial roll type feeding means 113, submerged grinding can be realized stably. Therefore, an expensive system such as connecting vacuum / decompression equipment or two or more expensive grinding devices in principle is unnecessary.

  The discharge side of the submerged grinding device may be received in the balance tank by a drop in the open state. Further, if the grinding device itself has discharge capability, a valve provided at the discharge port (ball cock, butterfly valve, control valve (control valve)), or raising the discharge port above the liquid level in the hopper 104, A flow rate adjusting valve, a back pressure valve (manual or automatic) or an orifice may be provided. Further, a metering pump or the like may be connected to the discharge port so that the pulverized material is sucked out (or the discharge of the pulverized material is suppressed). Further, the flow rate may be limited by adjusting the diameter and length (pipe resistance) of the pipe connected to the discharge port side. That is, it is not particularly limited as long as it can control the fluid.

  The submerged grinding apparatus in the present embodiment is premised on continuous operation, but can also be applied to batch operation or batch continuous operation. When the submerged grinding device is operated, the liquid raw material 103 and the solid raw material 102 are weighed at a constant flow rate, and if the submerged grinding device clearance (adjusted and fixed in the initial stage of operation) is constant and is constant. During continuous operation from time to about 1 day to several months, it is sufficiently stable from start to finish. If necessary, a level control system may be provided so that the liquid level of the liquid raw material 103 and the level of the solid raw material 102 are detected by a sensor and kept constant. The level sensor is not particularly limited, such as an electrode type, a magnetostrictive type, an ultrasonic type, and a laser type. It is also possible to adjust the subtle level balance between the solid raw material 102 and the liquid raw material 103 by manually adjusting the rotational speed of the submerged grinding device, the control valve on the discharge side, or the rotational speed of the pump, or by automatically shifting the speed. it can.

  In the above-mentioned submerged grinding apparatus, it is necessary to seal the discharge port side and to block the entry of air at a minimum. For example, if air is allowed to enter without sealing the discharge port, bubbles are generated during grinding in the grinding chamber 106, fine bubbles are bitten into the slurry, and the apparent volume increases. On the other hand, for example, by connecting the pump P while sealing the slurry discharge port and cutting off the air intrusion route, the hopper 104 to the pump P are filled with the liquid raw material 103, and the air does not enter and the liquid does not enter. Medium crushing is realized.

  The means for sealing the discharge port of the submerged grinding device is not limited to the pump P, and a simple device such as a valve or siphon can be used.

Alternatively, a flow rate control device connected to the outlet of the submerged grinding apparatus for the purpose of grinding in liquid while maintaining the ratio of the solid raw material 102 and the liquid raw material 103 constant and stable even in continuous operation. Thus, the liquid level in the hopper 104 may be adjusted to be constant. In this case, the flow control device may be a simple device such as a ball cock, a valve such as a butterfly valve, or an orifice. Preferably, a self-priming positive displacement pump (rotary pump, gear pump, vane pump, tube pump, mono pump, etc.) is provided, and a liquid level sensor is provided in the hopper 104. Based on a detection signal of the liquid level sensor, Control the number of rotations (suction amount) of the pump.

  When the control is performed, when the subsequent process is, for example, a process using a continuous boiling apparatus, the boiling time and concentration slightly vary, but the effect of in-liquid grinding is emphasized. There is no problem in the case of a batch-type boiling apparatus. In addition to the flow rate control, the flow rate control device is used for discharging the air in the grinding chamber 106 and filling the slurry in the initial stage of operation.

  As described above, by providing the flow rate control device that can adjust the suction amount of the volume pump in conjunction with the liquid level in the hopper 104, the suction amount of the volume pump is too large or too small, It is possible to prevent the liquid level from being excessively lowered or conversely overflowing. As a result, the work can be performed stably.

  In the submerged grinding apparatus having the above-described configuration, the conventional simple screw-type pushing device (screw-type conveyor having only the conveying purpose) and the volume capable of transporting the solid raw material to the raw material supply port of the submerged grinding apparatus Additional equipment such as a pump is not required, and there is no worry of clogging due to the press-fitting of the solid material 102. Further, even when the liquid raw material 103 is less than the solid raw material 102, no special pump or pushing device is required on the supply side, and the pump P connected to the discharge port (a normal commercial product may be used and is inexpensive). ) Can be finely and accurately ground. Similarly, you may adjust the rotational speed control of the grindstone 105 which is a grinding part, and any one or both of the solid raw material 102 and the liquid raw material 103 (the ratio of both is made the same).

  FIG. 39 shows an example of a submerged grinding system provided with a submerged grinding device equipped with a grinding device having the flow restricting means 107. As described above, the submerged grinding apparatus has the same configuration as that shown in FIG. 28, and the submerged grinding apparatus 101 includes a hopper 104, a fixed grindstone 105a, and a rotating grindstone 105b. In FIG. 39, a motor M for rotating the rotary grindstone 105b is shown.

Downstream position of the pump P, the flow meter 116 is installed, the adjusting meter 117 and the inverter 118 is provided to control the pump P of the rotational speed (flow rate) on the basis of the flow rate measured by the flow meter 116 Yes. When a valve is provided in place of the pump P, the inverter 118 can be omitted, and the opening degree of the valve is adjusted by the controller 117.

  In order to grind the solid raw material together with the liquid raw material and form a slurry by such a submerged grinding system, first, the solid raw material 102 and the liquid raw material 103 are supplied to the hopper 104. The solid raw material 102 charged into the hopper 104 falls from the raw material supply port into the grinding chamber 106 by its own weight. At the same time, the liquid raw material 103 in the hopper 104 is also supplied from the raw material supply port into the grinding chamber 106. In the grinding chamber 106, the solid raw material 102 is ground between the grinding parts, that is, between the fixed grindstone 105a and the rotating grindstone 105b, and is made into a slurry and discharged from the discharge port by the pump P.

  At the time of grinding, liquid level control is important, and also in this system, the pump P is connected while the discharge port is sealed to cut off the intrusion of air. Furthermore, the rotation speed (flow rate) of the pump P is controlled by the controller 117 and the inverter 118 based on the flow rate measured by the flow meter 116 so that the liquid level of the liquid raw material 103 in the hopper 104 is kept constant. ing.

  By these, the whole path | route from the hopper 104 to the pump P will be filled with the liquid raw material 103, and what is called in-liquid grinding | pulverization can be performed. Furthermore, since the rotation speed of the pump P is controlled so that the flow rate becomes appropriate, the submerged pulverization can be performed stably.

  FIG. 40 shows another example of the submerged grinding system. The submerged grinding system of this example basically has the same configuration as the example shown in FIG. 39, but is based on the liquid level of the liquid raw material 103 detected by the liquid level sensor 119 provided in the hopper 104. Thus, the rotation speed (flow rate) of the pump P is controlled by the controller 117 and the inverter 118 so that the liquid level of the liquid raw material 103 in the hopper 104 is kept constant.

  By adjusting the suction amount of the pump P in conjunction with the liquid level in the hopper 104 as in this example, the suction amount of the pump P is too much or too little, and the liquid level in the hopper 104 is lowered. It is possible to prevent the liquid raw material 103 from overflowing from the hopper 104 or conversely. As a result, the liquid can be stably pulverized.

  In each example in which the above-described flow restricting means 107 (feed means 113) is installed, it functions as a feed device for only the solid raw material 102. For example, in the example of FIG. 28, the liquid raw material 103 flows from the gap between the rough rolls 113a and 113b, so that it is not forced press-fitting by a conventional pump.

The inventors actually made a submerged grinding apparatus and conducted a grinding experiment to confirm the effect of installing the above-described flow restricting means 107 (feeding means 113). Specifically, Example (submerged grinding apparatus shown in FIG. 28, grinding surface is disk-shaped) and Comparative Example 1 (conical grinder, conventional cone-type grindstone grinder, grinding surface is conical, air About embrace type), the milling of soy, was measured raw Wu of the specific gravity (density).

  Clean grinder (manufactured by Takai Seisakusho Co., Ltd.), a milling part of miracle sander (manufactured by Takai Seisakusho) Triturated with. Soybean weighing was 6 俵 / hour (6 kg / min) for raw soybeans and 12 L / min for ground water, and the conditions were constant. “Open milling” (comparative example) with the grinding machine outlet open, and a gear pump connected to the grinding machine outlet to push out the air in the grinding chamber, and then grinding in the same liquid (implementation) Example). Each ground product (so-called raw kure) was placed in a fixed amount of container, and the specific gravity (density) was determined from the volume and weight. The results are shown in Table 1.

  As is clear from Table 1, the specific gravity of water was 1.0267. From the results, in the case of submerged grinding, the specific gravity was 1.0357 and the specific gravity was 1 or more, and it became clear that almost no air was entrapped in the milled product compared to 0.9123 at the time of open grinding. After that, without adding an antifoaming agent to both raw conditions, steam was blown in a soymilk production plant NS2000S (manufactured by Takai Seisakusho) (batch kettle) and heated to 100 ° C. Although it spilled at about 80 degreeC, the direction of the grinding | pulverization in a liquid was not spilled even if it became 98 to about 100 degreeC.

It is a schematic diagram which shows an example of the submerged grinding apparatus of the 1st Embodiment of this invention. It is a schematic diagram which shows the example of the submerged grinding system which uses a submerged grinding apparatus. It is a schematic diagram which shows the other example of the submerged grinding system which uses a submerged grinding apparatus. It is a schematic diagram which shows the other example of the submerged grinding system which uses a submerged grinding apparatus. It is a schematic diagram which shows an example of the submerged grinding apparatus of other embodiment of this invention. It is a schematic diagram which shows the submerged grinding system using the said submerged grinding apparatus. It is a schematic diagram which shows the submerged grinding apparatus of other embodiment of this invention. It is a schematic diagram which shows the submerged grinding apparatus of other embodiment of this invention. It is a schematic diagram which shows an example of a flow control means. It is a schematic diagram which shows an example of a flow control means. It is a schematic diagram which shows an example of a flow control means. It is a schematic diagram which shows an example of a flow control means. It is a schematic diagram which shows an example of a flow control means. It is a schematic diagram which shows the other example of the submerged grinding system using a submerged grinding apparatus. It is a schematic diagram which shows the other example of the submerged grinding system using a submerged grinding apparatus. It is a schematic diagram which shows the other example of the submerged grinding system using a submerged grinding apparatus. It is a schematic diagram which shows the other example of the submerged grinding system using a submerged grinding apparatus. It is a schematic diagram which shows the other example of the submerged grinding system using a submerged grinding apparatus. An example of the flow control means of the 2nd Embodiment of this invention is shown, (a) is a perspective view, (b) is a top view, (c) is a side view. It is a figure which shows typically the submerged grinding apparatus of the 2nd Embodiment of this invention. It is a schematic diagram which shows the example of the submerged grinding system using the submerged grinding apparatus which provided the flow control means. It is a schematic diagram which shows the example of the submerged grinding system using the submerged grinding apparatus which provided the flow control means. It is a schematic diagram which shows the other example of a flow control means. It is a schematic diagram which shows the further another example of a flow control means. It is a schematic diagram which shows the further another example of a flow control means. It is a schematic diagram which shows the further another example of a flow control means. It is a schematic diagram which shows the further another example of a flow control means. It is a schematic diagram which shows an example of the submerged grinding apparatus which provided the feed means as a flow control means. It is a schematic diagram which shows the other example of a sending means. It is a schematic diagram which shows the further another example of a sending means. It is a schematic diagram which shows the further another example of a sending means. It is a schematic diagram which shows the further another example of a sending means. It is a schematic diagram which shows the further another example of a sending means. It is a schematic perspective view which shows the example of a shape of the roll of a feeding means. It is a schematic diagram which shows the example of a screw type feeding means. It is a schematic diagram which shows the example which made the submerged grinding apparatus horizontal. It is a schematic diagram which shows the example which provided the valve | bulb instead of the pump. It is a schematic diagram which shows the example which provided the siphon instead of the pump. It is a schematic diagram which shows the 1st example of the submerged grinding system using the submerged grinding apparatus which provided the sending means as a flow control means. It is a schematic diagram which shows the 2nd example of the submerged grinding system using the submerged grinding apparatus which provided the sending means as a flow control means. It is a schematic diagram which shows the 1st example of the liquid grinding device provided with the biaxial roll type flow control means. It is a schematic diagram which shows the 2nd example of the liquid grinding device provided with the flow control means which is a helical body of another drive. It is a schematic diagram which shows the 3rd example of the liquid grinding device provided with the flow control means which is a helical body of another drive. It is a schematic diagram which shows the 4th example of the liquid grinding device provided with the flow control means (horizontal axis) which is a helical body of another drive. It is a schematic diagram which shows the 5th example of the liquid grinding | polishing apparatus of the form provided with the current control means which is a helical body of another drive, and supplying a solid raw material and a liquid raw material separately. It is a schematic diagram which shows the 5th example of the liquid grinding | polishing apparatus of the form provided with the current control means which is a helical body of another drive, and supplying a solid raw material and a liquid raw material separately. It is a schematic diagram which shows the 7th example of the liquid grinding device which is provided with a stationary flow control means and a solid raw material deform | transforms a little and is supplied. It is a schematic perspective view which shows the example of a shape of the roll of a feeding means.

1 supply device, 2,101 submerged grinding device, 3 raw material supply port, 5,104 hopper,
6,102 solid raw material, 7 inlet, 8,103 liquid raw material, 9 liquid raw material introduction pipe,
10, 111, 122 level sensor, 11, 105 grinding wheel,
11a, 105a fixed grindstone, 11b, 105b rotating grindstone, 12,106 grinding chamber,
13 outlet, 14 pump, 15 valve (including back pressure valve, orifice, control valve),
16 Siphon,
21 solid raw material supply pipe, 22 solid raw material supply pump,
23, 24 Feed roll (biaxial roll),
31 Motor, 32 Flow meter, 33 Controller, 34 Inverter, 41 Weighing machine,
42 Inverter, 43 Raw material tank, 44 Pump, 45 Valve, 46 Flow meter,
47 Controller, 51 Motor, 52 Weigh scale, 53,109 Controller,
54,110 inverter, 55 ratio setter, 56 controller,
S, 107 current control means, 107a fluid, 107b blade,
113 Feeding means, Pi transfer pipe, U vortex, mm groove

Claims (8)

A hopper that is charged with and fed with a solid raw material and a liquid raw material, a grinding chamber for grinding the solid raw material together with the liquid raw material in the grinding section, and a control provided between the hopper and the grinding chamber and below the liquid level. Flow means,
The liquid level sensor detects the level of the raw material in the hopper for charging the solid raw material and the liquid raw material,
When the solid raw material is ground together with the liquid raw material in the grinding section in the grinding chamber to form a slurry, the liquid level of the liquid raw material is set to fill the grinding chamber and to satisfy at least a part of the hopper. And the above-mentioned grinding is performed. Based on the detection result of the liquid level sensor, according to claim 1, wherein adjusting the level of the material in the hopper constant by the grinding unit feed control means provided after the outlet of the Submerged grinding equipment. Based on the detection result of the liquid level sensor, by controlling the rotational speed of the rotary grinding砕部material of the grinding apparatus, according to claim 1, wherein adjusting the level of the material in the hopper constant Submerged grinding equipment. A hopper that is charged with and fed with a solid raw material and a liquid raw material, a grinding chamber for grinding the solid raw material together with the liquid raw material in the grinding section, and a control provided between the hopper and the grinding chamber and below the liquid level. Flow means,
The flow rate of the liquid material or solid material is detected by a measuring means such as a flow meter or a weight meter, or the flow rate of the ground material is detected by a flow meter provided after the discharge port of the grinding device,
When the solid raw material is ground together with the liquid raw material in the grinding section in the grinding chamber to form a slurry, the liquid level of the liquid raw material is set to fill the grinding chamber and to satisfy at least a part of the hopper. And the above-mentioned grinding is performed. Based on the detection result of the weighing means, the ratio of the supply amount of the solid raw material supply device and the supply amount of the liquid raw material supply device is adjusted to be constant through the ratio setting device, while the raw material in the hopper is adjusted. The submerged grinding apparatus according to claim 4, wherein the level is adjusted to be constant. The submerged grinding apparatus according to claim 4 , wherein the level of the raw material in the hopper is adjusted to be constant by a liquid feeding control means provided after the discharge port of the grinding apparatus. 6. The submerged grinding apparatus according to claim 1 or 5 , wherein the flow restricting means suppresses swirling flow or vortex flow of the solid raw material when supplying the solid raw material into the grinding chamber.   A submerged grinding system, wherein the outlet of the submerged grinding apparatus according to any one of claims 1 to 7 is connected to an inlet of a defoaming apparatus.

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