JP6410071B1 - Solid-liquid separator - Google Patents

Abstract

In a solid-liquid separation apparatus equipped with a squeezing machine that performs squeezing by submerged filtration, solid-liquid separation processing can be performed stably and efficiently over a long period of time while maintaining appropriate filtration processing capacity. Like that. SOLUTION: A liquid discharge means 3 connected to an outlet 21 is provided with a pressure reducing means 34, and a submerged filtration state in which the squeezed screen 10 is immersed in the liquid chamber 14 is maintained by a vacuum suction action derived from the pressure reducing means 34. However, the liquid component 6 is taken out from the liquid chamber 14 through the outlet 21. Thereby, in addition to the squeezing action from the inside of the squeezing screen 10, the negative pressure action from the outside of the squeezing screen 10 can be applied to the squeezing screen 10, so that the filtration is performed only by the conventional squeezing action. Compared to the above, the crushing screen 10 is less likely to be clogged, and the filtration processing capability of the crushing screen 10 can be prevented from rapidly decreasing. [Selection] Figure 1

Description

The present invention relates to a solid-liquid separation equipment comprising a screw-type presses for performing compression in a liquid filtration system.

  A solid-liquid separation apparatus including a screw-type pressing machine that performs pressing by this type of submerged filtration method is known from Patent Document 1 by the present applicant. The pressing machine described in Patent Document 1 is a pressing machine for tofu production, a pressing screen formed in a cylindrical shape with a perforated plate, a jacket disposed at a predetermined interval on the outer periphery of the pressing screen, and a pressing And a screw that is driven to rotate inside the screen. The inside of the jacket is partitioned into a pressing chamber and a soy milk chamber by a pressing screen, and the peripheral wall of the jacket located above the liquid level line with reference to the liquid level line that exceeds the upper surface of the pressing screen in the soy milk chamber In addition, an outlet for discharging soy milk is opened. A front outlet is provided at the center of the upper surface on the outlet side of the jacket, and a drain port is provided at the center of the lower surface on the outlet side of the jacket. In order to transfer the boiled rice cooked in the steamer to the press, a transfer passage made of stainless steel pipe is connected between the steamer outlet and the bearing case of the press, and it is provided in the middle of the transfer passage. By driving the transferred pump, the boiled steamer in the steaming pot can be pumped to the press.

  The boiled rice fed to the bearing case of the pressing machine is compressed while being transferred to the downstream side by a screw, and soy milk is squeezed out from the pressing screen. Okara, which is squeezed in the compression chamber, is dropped and discharged through a chute from a discharge port provided at the downstream end of the squeezing machine. At the time of such pressing, the lower drain port is closed, and the squeezed soymilk stays in the soymilk chamber, and soon after the start of pressing, the entire pressing screen is filled in the soymilk chamber. As the liquid level of the soy milk rises, the air in the soy milk chamber is discharged from the outlet. The soy milk that has overflowed from the outlet as the pressing process proceeds is received in the soy milk container via the soy milk passage connected to the outlet, or is fed to the next processing apparatus.

  As described above, in the expression machine of Patent Document 1, since the soymilk chamber in the jacket is filled with soymilk and at least the expression screen is squeezed in the soymilk, soymilk squirts from the expression screen during expression. It is possible to squeeze high-quality soy milk that does not contain air bubbles from the boiled rice, while preventing air bubbles from colliding with the inner wall of the jacket.

JP-A-8-275749

  As described above, in the conventional pressing machine, the boiled rice that has been transferred to the upstream side of the pressing machine by the transfer pump is transferred to the downstream side of the pressing machine by the propulsive force of the screw and is compressed until it reaches the downstream end. -It is filtered and separated into a liquid component (soy milk) and a solid component (okara). However, in the conventional press, when clogging occurs due to solids adhering to the mesh of the pressing screen, clogging in the mesh is eliminated unless the solids are pushed out from the mesh to the soy milk chamber side by the thrust of the screw. This makes it difficult to properly filter the boiled rice. In the worst case, when a solid accumulation layer is formed on the inner surface of the pressing screen, the pressing screen may lose its function. When clogging occurs in the squeezed screen, it is inevitable that the amount of water contained in okara, which is a solid content, fluctuates. As mentioned above, in the conventional pressing machine, it has been difficult to stably and efficiently perform the pressing process on the boiled rice for a long time while maintaining an appropriate filtration capacity.

  In addition, in the conventional squeezer, since the simmer is pumped toward the squeezer by the transfer pump, it is inevitable that cavitation occurs in the case of a simmer that contains a large amount of air bubbles or a hot simmer. The boiled rice cake could not be smoothly transferred to the squeezer, resulting in a decrease in the filtration capacity of the squeezer. Moreover, the boiled rice was pressurized when passing through the transfer pump, and its physical properties could change.

The present invention Oite the solid-liquid separation equipment comprising a squeezing machine which performs pressing in a liquid filtration system, while maintaining adequate filtering capacity, stably and efficiently over a solid-liquid separation process to long The first object is to be able to do this.
In addition, the present invention is Oite the solid-liquid separation equipment comprising a squeezing machine which performs pressing in a liquid filtration system, if the processing object is to include bubbles or cavitation even if the processing object is a high-temperature The second object is to stably supply the squeezing target to the squeezing machine without being generated.

The present invention squeezes a solid-liquid mixed processing object 4 and separates it into a solid component 5 and a liquid component 6, and a processing object supply means for feeding the processing object 4 into the pressing means 1. 2 and the liquid carrying-out means 3 which takes out the liquid component 6 from the pressing means 1 are made into the object. The pressing means 1 includes a pressing screen 10 formed in a cylindrical shape with a perforated plate, a jacket 11 that covers the outer peripheral surface of the pressing screen 10, and a pressing screw 12 that is disposed inside the pressing screen 10 so as to be rotationally driven. . The space between the pressing screen 10 and the jacket 11 is a liquid chamber 14, and the inside of the pressing screen 10 is a pressing chamber 15. The outlet 21 for taking out the liquid component 6 is provided in the surrounding wall of the jacket 11 located above the upper surface of the pressing screen 10 in the liquid chamber 14, and the pressing screen 10 is immersed in the liquid chamber 14. Thus, filtration of the processing object 4 is performed . The liquid carry-out means 3 connected to the outlet 21 is provided with a pressure reducing means 34, and a submerged filtration state in which the squeezing screen 10 is immersed in the liquid chamber 14 is maintained by a vacuum suction action derived from the pressure reducing means 34. the liquid component 6 from the liquid chamber 14 through the outlet 21 preparative while has been configured to be taken out. The liquid carry-out means 3 includes an extraction channel 30 connected to the extraction port 21, a gas-liquid separation unit 31 connected to the extraction channel 30, a decompression channel 33 connected to the gas-liquid separation unit 31, and a decompression Pressure reducing means 34 connected to the flow path 33. The gas-liquid separating means is a vacuum tank 31, and a liquid component discharge passage 32 is connected to the vacuum tank 31, and external air is supplied to the vacuum tank 31 when the discharge passage 32 is opened. Air supply means 47 for taking in is provided.

  The processing object 4 can be configured to be fed into the squeezing chamber 15 from the processing object supply means 2 by the reduced pressure suction action of the decompression means 34.

The transportable Izuru path 32, together with the pumping liquid component 6 in the vacuum tank 31, it is possible to employ a configuration in which the suction pump 60 to exert a vacuum suction effect in cooperation with the pressure reducing means 34 is provided.

  The processing object supply unit 2 may include a transfer pump 28 that pumps the processing object 4 toward the pressing unit 1.

Oite the solid-liquid separation equipment of the present invention, the peripheral wall of the jacket 11 positioned above the upper surface of the pressing screen 10 in the liquid chamber 14, provided with a outlet 21 for taking out the liquid component 6, the liquid Since the processing object 4 is filtered (in-liquid filtration) while the pressing screen 10 is immersed in the chamber 14, the liquid component 6 ejected from the pressing screen 10 during filtration is applied to the inner wall surface of the jacket 11. The generation of bubbles by contact can be eliminated, and a high-quality liquid component 6 that does not contain bubbles can be obtained from the processing object 4. In addition, since the liquid component 6 is taken out from the outlet 21 located above the upper surface of the squeezing screen 10 by the vacuum suction action derived from the decompression means 34, the liquid filtration is performed when the liquid component 6 is taken out from the outlet 21. The state is not impaired, and in this respect as well, the liquid component 6 ejected from the squeezing screen 10 during filtration can be prevented from coming into contact with the inner wall surface of the jacket 11 to generate bubbles, thereby contributing to the improvement of the quality of the liquid component 6. In particular, when the present invention is applied to a pressing device for producing soymilk, high-quality soymilk that does not contain bubbles can be obtained from boiled rice.

Further, according to the solid-liquid separation equipment of the present invention, it is possible to negative pressure than pressing chamber 15 side receives with the liquid chamber 14 side vacuum suction effect of the vacuum means 34, processed by squeezing screw 12 In addition to the squeezing action from the inside derived from the propulsive force of the object 4, a negative pressure action from the outside can be applied to the squeezing screen 10. Therefore, according to this invention, compared with the form which performs filtration only by the conventional squeezing action, the squeezing screen 10 is less likely to be clogged, and can prevent the filtration processing capability of the squeezing means 1 from rapidly decreasing. The solid-liquid separation process can be stably performed over a longer time. To give an example, in the conventional pressing device for producing soymilk (solid-liquid separation device), in view of the reduction in the filtration capacity resulting from clogging of the pressing screen 10, continuous operation for about 10 hours is possible, While a washing operation is required every 10 hours of operation, using the squeezing device (solid-liquid separation device) of the present invention enables continuous operation over 20 hours, compared to conventional devices. Thus, productivity can be greatly improved. In addition, it is possible to prevent the occurrence of inconvenience such as an increase in the amount of water contained in the solid component 5 as a result of the reduction of the filtration capacity. Since the filtration process by the negative pressure action can be performed on the entire pressing screen 10, in other words, the filtration process can be performed by both the pressing action and the negative pressure action, so that the filtration process is performed only by the pressing action. Compared with the form, the solid-liquid separation process can be executed more efficiently.

  The liquid discharge means 3 for taking out the liquid component 6 from the squeezing means 1 is provided with a decompression means 34, in other words, a decompression means 34 is provided on the downstream side of the squeezing means 1, and the decompression means 34 is provided with a decompression suction action. Since the processing object 4 is supplied toward 1, the decompression means 34 does not cause cavitation even when the processing object 4 contains bubbles or when the processing object 4 is hot. The processing object 4 can be stably supplied to the pressing means 1. Even when the processing object 4 has a high viscosity, the processing object 4 can be supplied to the squeezing means 1 more stably.

  Specifically, the liquid carry-out means 3 includes a take-out flow path 30 connected to the take-out port 21, a gas-liquid separation means 31 connected to the take-out flow path 30, and a decompressed flow connected to the gas-liquid separation means 31. The passage 33 and the decompression pump 34 which is decompression means connected to the decompression flow path 33 can be included. Thereby, the decompression suction action of the decompression means 34 can be applied to the squeezing means 1 via the extraction flow path 30 and the gas-liquid separation means 31.

  The gas-liquid separation means is a vacuum tank 31, and a discharge passage 32 for the liquid component 6 is connected to the vacuum tank 31, and external air is supplied to the vacuum tank 31 when the discharge passage 32 is opened to the decompression passage 33. It is possible to adopt a configuration in which an air supply means 47 for taking in is provided. According to this, when the liquid component 6 in the vacuum tank 31 is carried out from the carry-out flow path 32, the liquid component 6 is smoothly drawn into the vacuum tank 31 by taking in external air into the vacuum tank 31 via the air supply means 47. Can be taken out from.

  When the processing object supply unit 2 includes the transfer pump 28 that pumps the processing object 4 toward the squeezing unit 1, the transfer forces of both the decompression unit (decompression pump) 34 and the transfer pump 28 are combined. Thus, the processing object 4 can be supplied more stably toward the pressing means 1.

It is a schematic block diagram which shows the solid-liquid separation apparatus which concerns on Example 1 of this invention. It is a vertical front view of the pressing machine which comprises a solid-liquid separator. It is a front view which shows the liquid carrying-out part which comprises a solid-liquid separator. It is a schematic block diagram for demonstrating the solid-liquid separation method. It is a schematic block diagram for demonstrating the solid-liquid separation method. It is a schematic block diagram which shows the solid-liquid separation apparatus which concerns on Example 2 of this invention. It is a schematic block diagram which shows the solid-liquid separation apparatus which concerns on Example 3 of this invention.

Shows (Example 1) Figure 1 to Example 1 according to the solid-liquid separation equipment according to the present invention in FIG. 5 to squeezing device for soymilk production. In the present embodiment, left and right and up and down follow the crossing arrows shown in FIG. 2 and the left and right and up and down displays shown near each arrow. As shown in FIG. 1 and FIG. 2, the squeezing apparatus squeezes the boiled rice 4 that is a solid-liquid mixed processing object, and into okara 5 that is a solid component and soymilk 6 that is a liquid component. From the pressing machine (squeezing means) 1 to be separated, the processing object supply unit (processing object supply means) 2 that is arranged on the upstream side of the pressing machine 1 and feeds the boiled food 4 into the pressing machine 1, and the pressing machine 1 A liquid carry-out section (liquid carry-out means) 3 for taking out the soy milk 6 is provided.

  As shown in FIG. 2, the pressing machine 1 can be driven to rotate inside a pressing screen 10 formed in a cylindrical shape with a steel alloy perforated plate, a jacket 11 covering the outer peripheral surface of the pressing screen 10, and the pressing screen 10. It is a screw press type squeezing machine comprised by the squeezing screw 12 distribute | arranged to and the valve mechanism 13 etc. which were provided in the exit end of the right end of the squeezing screen 10. The pressing screen 10 and the jacket 11 are arranged in an inner and outer double, and divide the liquid chamber 14 and the pressing chamber 15 into the inside and outside. Here, the space between the pressing screen 10 and the jacket 11 is a liquid chamber 14, and the inside of the pressing screen 10 is a pressing chamber 15.

  While the inner diameter dimension of the jacket 11 is set uniformly in the left-right direction, the squeezing screen 10 is formed in a tapered cylindrical shape in which the diameter dimension gradually decreases toward the outlet side (right side). . The pressing screw 12 includes a shaft 12a that is rotatably supported and a spiral pressing blade 12b that is fixed to the peripheral surface of the shaft 12a. The squeezing blade 12b is tapered toward the outlet side (right side), and the blade pitch is made smaller as it approaches the outlet side (right side). The tip of the squeezing blade 12b extends over the entire length of the squeezing screen. 10 is inscribed.

  As shown in FIG. 1, the drive mechanism of the compression screw 12 includes a motor 17 with a speed reducer and a bearing 18 that supports the base end of the compression screw 12. In FIG. 1 and FIG. 2, the code | symbol 19 has shown the carrying-in chamber connected with the downstream of the jacket 11, and the pressing machine 1 from the process target supply part 2 via the inflow port 20 provided in this carrying-in chamber 19 is shown. The boiled rice 4 is sent into the inside.

  An outlet 21 for taking out soy milk is provided in the peripheral wall of the jacket 11 located above the upper surface of the pressing screen 10 in the liquid chamber 14. In this embodiment, an outlet 21 is provided on the upper surface of the jacket 11, and a drain port 22 for drainage is provided on the lower surface of the jacket 11. Thus, when the outlet 21 is provided above the upper surface of the pressing screen 10, the cooking screen 4 can be filtered by the pressing screen 10 while the pressing screen 10 is immersed in the liquid chamber 14. That is, in-liquid filtration can be performed. Further, the soy milk 6 can be carried out from the liquid chamber 14 through the outlet 21 while maintaining the in-liquid filtration state.

  A sealing plug 23 is fixed to the end (right end) of the jacket 11 on the outlet side. The sealing plug 23 is provided with an outlet for the okara 5 formed in a cake shape, ie, a cake outlet, that is, a cake outlet 24, and a valve mechanism 13 is provided at the cake outlet 24. The valve mechanism 13 is swingably mounted around a hinge shaft provided at the opening edge of the cake outlet 24 and cantilevered rightward from the sealing plug 23 and a valve body 13a for opening and closing the cake outlet 24. A rod 13b extending in the shape of a rod, a check arm 13c configured to be slidable in the left-right direction along the rod 13b, and receiving the outer surface of the valve body 13a, and attached to the rod 13b to prevent the check arm 13c from coming off. It is comprised by the lock body 13d and the spring 13e which is arrange | positioned between the check arm 13c and the lock body 13d, and urges | biases the valve body 13a to a closed attitude | position via the check arm 13c. Okara 5 moved to the right end of the compression chamber 15 by the propulsive force of the compression screw 12 opens the valve body 13a against the urging force of the spring 13e, and is dropped and discharged to the outside of the jacket 11 through the cake outlet 24. The

  In FIG. 1, the processing object supply unit 2 is composed of a raw material tank 26 in which the boiled rice 4 raised by a steaming pot (not shown) is accommodated, and a stainless steel pipe connecting the raw material tank 26 and the inlet 20. A flow path 27 and a transfer pump 28 provided in the middle of the flow path of the transfer flow path 27 are provided. The raw material tank 26 is a constricted and tapered hollow container, and a transfer channel 27 is connected to the bottom.

  The liquid carry-out unit 3 is connected to the take-out port 21 and has a take-out flow path 30 for taking out soy milk from the liquid chamber 14 of the press 1, and a vacuum tank (gas-liquid separation means) 31 connected to the take-out flow path 30. A discharge passage 32 connected to the vacuum tank 31 for discharging the soy milk contained in the vacuum tank 31, and a vacuum passage 31 connected to the vacuum tank 31 for discharging and depressurizing the air in the vacuum tank 31. The decompression flow path 33, a decompression pump (decompression means) 34 provided in the middle of the decompression flow path 33, a drain flow path 35 connected to the drain port 22, and the like. Each of the take-out flow path 30, the decompression flow path 33, and the drain flow path 35 is provided with first to third cocks 36 to 38 for opening and closing the respective flow paths. A first electromagnetic valve 39 that opens and closes is provided. The downstream end of the extraction flow path 30 is connected to the downstream end of the drain flow path 35, and the soy milk extracted to the extraction flow path 30 via the downstream end of the drain flow path 35 is supplied into the vacuum tank 31. It is like that.

  The vacuum tank 31 is a metal hollow cylindrical body formed in a vertically long shape. As shown in FIGS. 1 and 3, a soymilk supply port 41 is opened at the bottom of the cylindrical wall, and a carry-out port 42 is formed at the bottom wall. It is opened and an exhaust port 43 is opened on the top wall. The supply port 41 is connected to the downstream end of the drain channel 35, the supply port 41 is connected to the carry-out channel 32, and the exhaust port 43 is connected to the decompression channel 33. The decompression flow path 33 includes a first flow path 33a extending upward from the exhaust port 43 of the vacuum tank 31, a second flow path 33b connected in the middle of the first flow path 33a and extending in the horizontal direction, and a second flow path. A third flow path 33c extending continuously downward from 33b to the second cock 37, a fourth flow path 33d extending from the second cock 37 to the carry-out flow path 32, and from the second cock 37 to the decompression pump 34. And the fifth flow path 33e. The second cock 37 is a three-way cock, and a standby posture for communicating between the third flow path 33c and the fourth flow path 33d, and a communication state between the third flow path 33c and the fifth flow path 33e. It is configured to be switchable between driving postures.

  A capacitance type liquid level sensor 45 is fixed to the upper end of the first flow path 33a, and the detection probe 46 extending into the vacuum tank 31 responds to fluctuations in the liquid level of the soy milk 6 in the vacuum tank 31. Outputs a liquid level signal. Here, a liquid level signal is output when the liquid level rises to a predetermined position in the vacuum tank 31 and when the liquid level drops to a predetermined position. An air supply path 47 for taking in external air into the vacuum tank 31 when the unloading flow path 32 is opened by the first electromagnetic valve 39 is connected to the second flow path 33b. The second electromagnetic valve 48 provided in the middle of the flow path can be opened and closed. Reference numeral 49 denotes a dust removing filter provided at the upper end of the air supply path 47. In addition, the liquid level signal from the liquid level sensor 45 is sent to the control apparatus which controls the whole expression apparatus outside a figure.

  A cooling water supply path 50 for supplying cooling water when the decompression pump 34 is driven is connected to the upper end of the third flow path 33c. The cooling water supply path 50 is configured to be opened and closed by a third electromagnetic valve 51 provided in the middle of the flow path.

  As shown in FIG. 3, the vacuum tank 31, the decompression pump 34, and the like constituting the liquid carry-out unit 3 are unitized as a suction unit 52. In FIG. 3, reference numeral 53 denotes a base that supports the entire suction unit 52, and reference numeral 54 denotes a pedestal that extends upward from the base 53 and supports the vacuum tank 31. In FIG. 3, reference numeral 55 denotes a motor that drives the decompression pump 34.

  The solid-liquid separation operation of the pressing device having the above configuration will be described with reference to FIGS. 4 and 5. First, the transfer pump 28, the decompression pump 34, and the motor 17 of the squeezing machine 1 are started in a state where the cooker 4 is accommodated in the raw material tank 26. At this time, as shown in FIG. 4, the operator of the squeezing device takes the first cock 36 into an open posture in which the extraction flow path 30 communicates, and the second cock 37 communicates with the third flow path 33 c and the fifth flow path 33 e. The third cock 38 is operated to a closed posture that closes the drain passage 35. Further, the first electromagnetic valve 39 is closed to close the carry-out flow path 32, the second electromagnetic valve 48 is closed to close the air supply path 47, and the third electromagnetic valve 51 is cooled by the control signal from the control device. The open posture is such that the water supply path 50 is opened. The cooling water supplied from the cooling water supply path 50 to the third flow path 33c is supplied to the decompression pump 34 via the fifth flow path 33e. As described above, the boiled rice 4 in the raw material tank 26 is sucked out by the transfer pump 28 and then brought into the squeezing machine 1 through the transfer flow path 27 and the inlet 20 by the vacuum suction action derived from the vacuum pump 34. Sent to chamber 19. The boiled rice 4 sent into the carry-in chamber 19 is transferred in the pressing chamber 15 toward the cake outlet 24 by the propulsive force of the pressing screw 12, and the okara 5 remaining in the pressing chamber 15 during that time, It is squeezed and separated into soy milk 6 that moves into the liquid chamber 14 through the squeezing holes of the squeezing screen 10. In addition, since the liquid chamber 14 side has a negative pressure from the squeezing chamber 15 side due to the vacuum suction action of the decompression pump 34, the soy milk 6 contained in the boil 4 in the high-pressure squeezing chamber 15 is moved to the low-pressure liquid chamber 14 side. The soymilk 6 can also be separated from the boiled egg 4 by being sucked. As described above, in the pressing device according to the present embodiment, the filtering operation, that is, the solid-liquid separation operation can be performed by both the pressing action by the pressing screw 12 and the negative pressure action by the decompression pump 34. The solid-liquid separation by the pressing action is performed only at the downstream end (right end) of the pressing screen 10, whereas the solid-liquid separation by the negative pressure action is performed by the entire pressing screen 10.

  As described above, during the solid-liquid separation operation, the third cock 38 is in a closed posture, and the drain flow path 35 is closed. For this reason, the soy milk 6 squeezed by the pressing screen 10 accumulates in the liquid chamber 14 and fills the liquid chamber 14 in a state where the entire pressing screen 10 is immersed in the soy milk 6 shortly after the start of pressing. As the liquid level of the soy milk 6 in the liquid chamber 14 rises, the air in the liquid chamber 14 is discharged from the outlet 21. The squeezed okara 5 is dropped and discharged through the cake outlet 24.

  When the boil 4 is squeezed in such a state that the soy milk 6 is filled in the liquid chamber 14 (in-liquid filtration state), the jet flow of the soy milk 6 squeezed from the squeezing screen 10 fills the liquid chamber 14. Since it flows into the soymilk 6 just by flowing in the soymilk 6, the jet flow does not collide with the inner surface of the jacket 11 to generate bubbles. Even in this submerged filtration state, the liquid chamber 14 side is under a negative pressure than the squeezing chamber 15 side due to the vacuum suction action of the vacuum pump 34. To be separated. Since the soy milk 6 in the liquid chamber 14 is sucked into the take-out flow path 30 via the take-out port 21 by the vacuum suction action of the decompression pump 34, the soy milk 6 is taken out from the liquid chamber 14 while maintaining the in-liquid filtration state. be able to. The soy milk 6 sucked into the take-out flow path 30 is sent from the supply port 41 to the vacuum tank 31 and stored.

  When the liquid level sensor 45 detects that the liquid level in the vacuum tank 31 has risen to a predetermined position as the squeezing progresses, the soy milk 6 is sent out from the vacuum tank 31 via the carry-out flow path 32. Specifically, as shown in FIG. 5, the operator operates the first cock 36 in a closed posture that closes the take-out flow path 30. In accordance with a control signal from the control device, the first electromagnetic valve 39 is set to an open posture for opening the carry-out passage 32, the second electromagnetic valve 48 is set to an open posture for opening the air supply passage 47, and the third electromagnetic valve 51 is set to cooling water. The closed posture is such that the supply path 50 is closed. The drive of the decompression pump 34 and the motor 17 of the pressing machine 1 is stopped. As described above, the soy milk 6 in the vacuum tank 31 can be smoothly sent out from the carry-out flow path 32 while supplying air into the vacuum tank 31 via the air supply path 47. When the liquid level sensor 45 detects that the liquid level in the vacuum tank 31 has been lowered to a predetermined position, the operation state of FIG. 4 is restored and the solid-liquid separation operation by the press 1 is performed. As described above, the pressing device performs solid-liquid separation by a batch system that repeats the storage of the soymilk 6 to the vacuum tank 31 and the delivery of the soymilk 6 from the vacuum tank 31.

  At the time of the cleaning operation, the raw material tank 26 is filled with the cleaning liquid, and then the transfer pump 28 and the decompression pump 34 are driven to send the cleaning liquid to the pressing machine 1, whereby the pressing screw 12 and the pressing screen 10 can be cleaned. . At this time, the cleaning liquid can be discharged from the squeezing machine 1 through the drain passage 35 by setting the third cock 38 to the open posture.

  As described above, in the pressing device according to the present embodiment, the outlet 21 for taking out the soymilk 6 is provided on the peripheral wall of the jacket 11 located above the upper surface of the pressing screen 10 in the liquid chamber 14, and the liquid Since the squeezing screen 10 is immersed in the chamber 14 and the boiled rice 4 is filtered (in-liquid filtration), the soy milk 6 ejected from the squeezing screen 10 at the time of filtration contacts the inner wall surface of the jacket 11. Thus, the generation of bubbles can be eliminated, and high-quality soy milk 6 containing no bubbles can be obtained from the boiled rice 4. Moreover, since the soy milk 6 is taken out from the outlet 21 located above the upper surface of the pressing screen 10 by the vacuum suction action derived from the vacuum pump 34, the in-liquid filtration state is impaired when the soy milk 6 is taken out from the outlet 21. In this respect as well, the soy milk 6 ejected from the pressing screen 10 at the time of filtration can be prevented from coming into contact with the inner wall surface of the jacket 11 to generate bubbles, thereby contributing to the improvement of the quality of the soy milk 6.

  In addition to the squeezing action from the inside of the squeezing screen 10, a negative pressure action from the outside of the squeezing screen 10 can be applied to the squeezing screen 10, so that it is compared with a mode in which filtration is performed only by the conventional squeezing action The pressing screen 10 is less likely to be clogged, and the filtration processing capacity of the pressing screen 10 can be prevented from rapidly decreasing. Therefore, according to the squeezing apparatus according to the present embodiment, it is possible to maintain an appropriate filtration processing capacity for a longer period of time, and it is possible to stably perform the solid-liquid separation process for a longer period of time. For example, in a conventional pressing device for producing soymilk, in view of a decrease in filtration capacity resulting from clogging of the pressing screen 10, continuous operation for about 10 hours is possible, and the operation for about 10 hours is performed. Whereas a cleaning operation is required every time, if the squeezing device of this embodiment is used, continuous operation over 20 hours can be performed, and productivity can be significantly improved compared to conventional devices. it can. Moreover, it is possible to prevent the occurrence of inconvenience such as an increase in the amount of water contained in okara 5 as a result of the reduction of the filtration capacity. Since the filtration process by the negative pressure action can be performed on the entire squeezing screen 10, the solid-liquid separation process can be executed more efficiently than the conventional form in which the filtration process is performed only by the squeezing action.

  The boiled food 4 is supplied from the raw material tank 26 toward the pressing machine 1 by the reduced pressure suction action of the pressure reducing pump 34 disposed on the downstream side of the pressing machine 1, so that the boiled food 4 contains bubbles. Even when the cooker 4 is hot, the decompression pump 34 does not cause cavitation, and the cooker 4 can be stably supplied to the press 1. In this embodiment, the transfer pump 28 of the processing object supply unit 2 may cause cavitation, but even in that case (even when cavitation occurs), the reduced pressure suction action of the decompression pump 34 is directed toward the press 1. Since the boiled rice 4 can be supplied, the supply of the boiled rice 4 can be advanced more stably. Moreover, since the transfer force of both pumps (the decompression pump 34 and the transfer pump 28) can be combined and the boiled rice 4 can be supplied toward the squeezing machine 1, only the decompression suction action of the decompression pump 34 is used for the boiled rice. Compared with the form which supplies 4, there also exists an advantage which can supply the boiled rice 4 to the pressing machine 1 more stably.

(Embodiment 2) FIG. 6 shows a solid-liquid separator (squeezing apparatus for producing soymilk) according to Embodiment 2 of the present invention. In this squeezing device, the point that the suction pump 60 is provided in the middle of the carry-out flow passage 32 is different from the first embodiment. Since the other points are the same as in the first embodiment, the same members are denoted by the same reference numerals, and the description thereof is omitted.

  According to the squeezing apparatus of the second embodiment, during the solid-liquid separation operation, the solid-liquid separation operation can be continuously executed by three balance controls of the decompression pump 34, the transfer pump 28, and the suction pump 60. It becomes. Therefore, the solid-liquid separation process is executed more quickly than the batch type pressing device that repeats the storage of the soymilk 6 in the vacuum tank 31 and the delivery of the soymilk 6 from the vacuum tank 31 as in the first embodiment. Soy milk 6 can be obtained.

(Embodiment 3) FIG. 7 shows a solid-liquid separation apparatus (squeezing apparatus for producing soymilk) according to Embodiment 3 of the present invention. In this squeezing device, the point that the squeezing machine 1 is a vertical type arranged in an upright posture is different from the first embodiment. The other points are the same as in the first embodiment.

  As the solid-liquid separation device of the present invention, the above embodiment has been described by taking a pressing device for producing soymilk as an example, but the present invention is not limited thereto, and the present invention is also applied to a pressing device for manufacturing fruit drinks such as apples. Is applicable. In the above embodiment, the transfer pump 28 is provided in the processing object supply unit 2, but the present invention is not limited to this. The transfer pump 28 is eliminated and only the vacuum suction action of the vacuum pump 34 is used for the raw material tank 26. The processing object can be configured to be fed to the press 1. In the above embodiment, the pressure reducing means is a vacuum pump as a vacuum pump. However, the present invention is not limited to this, and may be an ejector or the like, as long as it exhibits a vacuum suction action. .

1 Pressing means (pressing machine)
2 Processing object supply means (processing object supply unit)
3 Liquid unloading means (Liquid unloading part)
4 processing object (boiled rice)
5 Solid ingredients (Okara)
6 Liquid ingredients (soy milk)
DESCRIPTION OF SYMBOLS 10 Squeeze screen 11 Jacket 12 Squeeze screw 14 Liquid chamber 15 Squeeze chamber 21 Extraction port 28 Transfer pump 30 Extraction flow path 31 Gas-liquid separation means (vacuum tank)
32 Unloading channel 33 Depressurizing channel 34 Depressurizing means (depressurizing pump)
47 Air supply means (air supply path)
60 Suction pump

Claims (4)

The processing object (4) which is pressed into the solid-liquid mixed processing object (4) and separated into the solid component (5) and the liquid component (6) and the pressing means (1). ) And a liquid carry-out means (3) for taking out the liquid component (6) from the squeezing means (1),
The squeezing means (1) can be rotationally driven inside the squeezing screen (10), the jacket (11) covering the outer peripheral surface of the squeezing screen (10), and the pressing screen (10). And a compression chamber (15) between the compression screen (10) and the jacket (11), and the inside of the compression screen (10) as a compression chamber (15). And
An outlet (21) for taking out the liquid component (6) is provided on the peripheral wall of the jacket (11) located above the upper surface of the pressing screen (10) in the liquid chamber (14). (14) In the state where the squeezing screen (10) is immersed, the filtration of the processing object (4) is performed,
The liquid carry-out means (3) connected to the outlet (21) is provided with a pressure reducing means (34), and a pressure screen (in the liquid chamber (14) by a vacuum suction action derived from the pressure reducing means (34). 10) is configured such that the liquid component (6) is taken out from the liquid chamber (14) through the outlet (21) while maintaining the filtered state in the liquid in which the liquid is immersed .
The liquid carry-out means (3) includes an extraction channel (30) connected to the extraction port (21), a gas-liquid separation unit (31) connected to the extraction channel (30), and a gas-liquid separation unit (31 And a decompression means (34) connected to the decompression flow path (33),
The gas-liquid separation means is a vacuum tank (31),
A discharge path (32) for the liquid component (6) is connected to the vacuum tank (31),
A solid-liquid separation device characterized in that the decompression channel (33) is provided with air supply means (47) for taking external air into the vacuum tank (31) when the carry-out channel (32) is opened. .   The solid-liquid separator according to claim 1, wherein the processing object (4) is fed from the processing object supply means (2) into the squeezing chamber (15) by the reduced pressure suction action of the decompression means (34). A suction pump (60) that pumps the liquid component (6) in the vacuum tank (31) into the carry-out flow path (32) and exhibits a vacuum suction action in cooperation with the pressure reduction means (34) is provided. The solid-liquid separation device according to claim 1 or 2. Solid-liquid separation according to any one of claims 1 to 3, wherein the processing object supply means (2) comprises a transfer pump (28) for pumping the processing object (4) towards the squeezing means (1). Equipment .

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