JP2012005586A - Pressurized steaming apparatus and washing method for pressurized steaming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressurized steaming apparatus and a washing method for the pressurized steaming apparatus capable of saving labor of washing, improving efficiency and furthermore, capable of improving the quality of raw materials.SOLUTION: The pressurized steaming apparatus 1 continuously pressurizing and steaming raw materials 20 includes: a net 4 circulating and moving inside a steaming can 2 while carrying the raw materials 20; and a washing nozzle 11 injecting steam onto the net 4 during the pressurized steaming of the raw material 20. The washing nozzle 11 is provided at the position of injecting steam from the back side of the raw material loading face against the net 4; thereby, not only hand washing after the operation can be saved but also a part of the pressurized steam for raw material steaming can be used for net washing, which leads to the improved efficiency of the apparatus. In addition to this, such problems as the mixing of foreign matter by the burn occurring because of the clogging of raw materials and the discharging of raw materials which are not sufficiently steamed can be solved, so that the quality of the steaming raw material is improved.

Description

  The present invention relates to cleaning of a net provided in a pressure cooking apparatus for steaming grain materials such as defatted soybeans, whole soybeans, pressed soybeans, and bran.

  2. Description of the Related Art As a pressure steaming device for cereal raw materials, one having a net conveyor in a steaming can is known (for example, Patent Document 1 below). The net conveyor is provided with a net-like net, and the raw material loaded on the net is conveyed in the steaming can as the net moves.

  Conventionally, washing of a pressure steaming apparatus is usually manual washing in which high-pressure washing water is jetted after operation. In particular, net cleaning that removes clogged raw materials was a time consuming and labor intensive task. On the other hand, if this net cleaning is insufficient, the quality of the cooked raw material may be adversely affected, so net cleaning was an indispensable operation.

Japanese Patent No. 3397901

  However, the conventional net cleaning has the following problems. The net in the net conveyor is a circular net that circulates and the upper and lower nets face each other. When cleaning the net, if high-pressure cleaning water is sprayed from the front side of the upper net, even if the raw material can be removed from the upper net, the raw material enters the lower net. For this reason, the raw material is not removed outside the net, and as a result, the raw material remains in the net, which is sanitary.

  In addition, if the net cleaning is insufficient or the clogged raw material is left unattended, the raw material that has been cooked for a long period of time and burnt will fall into the outlet along with the steamed raw material during operation and become contaminated. There is a fear. In addition, since the net was conventionally washed after operation, it was necessary to remove the burnt raw material after operation. It was difficult to remove the raw material that burned to the net, and it was necessary to move the net many times after operation to perform high-pressure cleaning. In this case, the amount of cleaning water also increases.

  Furthermore, the biggest problem is that when the net is clogged with raw materials during operation, when the steam blown into the steaming can condenses and drainage is generated, moisture tends to accumulate on the net. In particular, when raw materials are round soybeans and pressed soybeans, candy-like drain containing polysaccharides adheres to the net, and the net looks like a flat belt, so the lower layer raw material is immersed in the water accumulated on the net. It becomes. If this state continues during the pressure cooking, the raw material in the portion soaked in water is not treated at the original cooking temperature, and as a result, the raw material that is not sufficiently cooked is discharged.

  Accordingly, a pressure steaming apparatus and a cleaning method for the pressure steaming apparatus that can save labor and increase efficiency of cleaning and improve the quality of raw materials while solving the above-described conventional problems were studied.

  As a result of the study, the pressure steaming apparatus of the present invention that has been developed is a pressure steaming apparatus that continuously pressurizes and steams raw materials. It is equipped with a cleaning nozzle that injects steam into the net during pressure cooking, and the cleaning nozzle is provided at a position for injecting steam from the back side of the raw material loading surface to the net. is there.

  In addition, the developed method of cleaning the pressure steaming apparatus of the present invention is a cleaning method of the pressure steaming apparatus that continuously pressurizes and steams the raw material, and the pressure steaming apparatus is a steaming can while transporting the material. Equipped with a net that circulates in the inside, and during the steaming of the raw material, steam is injected from the back side of the raw material loading surface to the net to remove the clogged raw material. This is a method for cleaning a steaming apparatus.

  According to the present invention, it is possible not only to save time and labor for manual cleaning after operation, but also to use part of the pressurized steam for steaming the raw material for net cleaning, so that the efficiency of the apparatus can be improved. . Furthermore, problems such as contamination by foreign matters due to clogging of the raw materials and discharge of raw materials that are insufficiently cooked are eliminated, and as a result, the quality of the steamed raw materials is improved.

  In the present invention, the vapor pressure of the steam injected from the cleaning nozzle to the net is made higher than the steaming pressure of the raw material to create a differential pressure, so that the steam injected to the net has a blowing speed corresponding to the differential pressure. It becomes pressurized steam, and this pressurized steam becomes striking force and a cleaning effect is obtained.

  As this differential pressure decreases, the striking force weakens and the cleaning effect also decreases. On the other hand, if the differential pressure is too high, the cleaning effect is enhanced, but the striking force is too strong and the raw material may be scattered. Moreover, the pressurized steam blown into may become superheated steam, and the raw material may be baked onto the net. The raw material baked on the net will burn and cause contamination.

  For this reason, in the said invention, it is preferable that the pressure of the vapor | steam injected with respect to a net | network is 0.05-0.30 MPa higher than the cooking pressure of a raw material. According to this configuration, it is possible to ensure a cleaning effect while preventing scattering of raw materials and seizure on the net.

  In the said invention, it is preferable to make the injection direction of the vapor | steam injected with respect to a net | network into the direction which goes to the discharge port provided in the inside of a steaming can. According to this configuration, recovery of the raw material removed from the net is facilitated.

  Further, when the steam injection direction to the net is one direction, for example, in the configuration in which the reinforcing bars are provided at a predetermined pitch on the net, the shaded area where the reinforcing steam is erected becomes a blind spot where the cleaning steam does not reach. For this reason, in the said invention, it is preferable to inject a vapor | steam to both the advancing direction and the reverse direction of a net | network. According to this configuration, when the steam injection direction to the net is one direction, the steam can be injected also into the blind spot portion where the steam does not reach, and the cleaning effect can be further enhanced.

  Further, steam for net cleaning may be blown directly into the net from the cleaning nozzle. The number of cleaning nozzles varies depending on the size of the net conveyor, that is, the width of the net. However, it is preferable that a plurality of cleaning nozzles be arranged evenly with respect to the width of the net at intervals of 90 to 100 mm to clean the entire surface of the net. Further, the cleaning nozzle is not limited to one in which a dedicated part for injection is attached to the pipe, but may be one in which an injection port is formed in the pipe itself.

  Rather than injecting the pressurized steam perpendicular to the net, the central axis of the cleaning nozzle is arranged at an inclination angle of 15 to 60 degrees with respect to a vertical line orthogonal to the net surface, and the pressurized steam is arranged. The better the cleaning property, the better the spraying.

  According to the present invention, it is possible not only to save time and labor for manual cleaning after operation, but also to use part of the pressurized steam for steaming the raw material for net cleaning, so that the efficiency of the apparatus can be improved. . Furthermore, problems such as contamination by foreign matters due to clogging of the raw materials and discharge of raw materials that are insufficiently cooked are eliminated, and as a result, the quality of the steamed raw materials is improved.

The block diagram of the pressure cooking apparatus which concerns on one Embodiment of this invention. FIG. 2 is a cross-sectional view of a main part taken along line AA in FIG. FIG. 2 is an enlarged view of the vicinity (B portion) of the cleaning steam pipe 9 of FIG. 1. The perspective view which looked at the steam pipe 9 for washing | cleaning of FIG. 3 from the back surface side. The top view which looked at the steam pipe for washing and the washing nozzle from the upper part. The top view which shows another example of arrangement | positioning of a washing nozzle. The top view which shows another example of arrangement | positioning of a washing nozzle. Schematic which shows another example of a discharge port.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, a schematic configuration of the pressure steaming apparatus 1 will be described with reference to FIGS. 1 and 2. FIG. 1 is a configuration diagram of a pressure steaming apparatus according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of an essential part taken along line AA in FIG. The pressure steaming device 1 is a device for continuously steaming the raw material 20 in the steam can 2 in a steam atmosphere. Examples of the raw material 20 include cereal raw materials such as defatted soybean, whole soybean, pressed soybean, and bran. Of these, defatted soybean, whole soybean, and pressed soybean are used for soy sauce brewing.

  A net conveyor 10 that conveys the raw material 20 is disposed in the steaming can 2. The net conveyor 10 includes an annular net 4, and the net 4 is driven so as to circulate in the steaming can 2. The raw material 20 passes through the raw material input port 6 by the rotation of the rotor of the raw material input side rotary valve 5 and is input onto the net 4. The raw material 20 put on the net 4 is conveyed in the direction of arrow a while being loaded on the net 4 due to the circular movement of the net 4.

  The net 4 that has transported the raw material 20 is folded back at the end of the net conveyor 10 and proceeds in the direction of arrow b opposite to the direction of arrow a. By turning back the net 4, the raw material 20 leaves the net 4 and is introduced into the discharge port 8. In the example of FIG. 1, the discharge port 8 is provided with a hopper 12 to widen the opening area of the tip. The raw material thrown into the discharge port 8 is discharged from the steaming can 2 by the rotation of the rotor of the raw material discharge-side rotary valve 7.

  A steam pipe 3 for steaming provided with a steaming nozzle 3 a is provided in the steaming can 2. Steam is sprayed from the spray nozzle of the steaming nozzle 3a, and the raw material 20 is pressure-steamed in the steam atmosphere in the steaming can 2.

  Next, cleaning of the net 4 will be described. As shown in FIGS. 1 and 2, the present embodiment includes a cleaning nozzle 11 provided in the cleaning steam pipe 9, in addition to the steaming nozzle 3 a provided in the steaming steam pipe 3. Then, the net 4 is automatically washed during the steaming of the raw material 20 by the steam sprayed from the injection port 14 of the cleaning nozzle 11, and the raw material 20 clogged in the net of the net 4 is removed.

  FIG. 3 shows an enlarged view of the vicinity (B part) of the cleaning steam pipe 9 of FIG. 4 shows a perspective view of the vicinity of the cleaning steam pipe 9 of FIG. 3 as seen from the back side. FIG. 5 is a plan view of the cleaning steam pipe 9 and the cleaning nozzle 11 as viewed from above.

  As shown in FIG. 3, a cleaning nozzle 11 is attached to the cleaning steam pipe 9. The cleaning nozzle 11 includes a cleaning nozzle 11a and a cleaning nozzle 11b having different vapor injection directions. As shown in FIG. 4, an injection port 14 for injecting steam is formed at the tip of the cleaning nozzle 11. 3 and 4, the cleaning steam pipe 9 and the cleaning nozzle 11 are covered with a protective cover 13. This is to prevent falling objects such as candy-like drains generated from the raw material from adhering to the cleaning nozzle 11 having a complicated shape that is difficult to clean.

  As shown in FIGS. 2 and 5, the cleaning steam pipe 9 is provided with a plurality of cleaning nozzles 11 at a predetermined pitch along the axial direction of the cleaning steam pipe 9. 2 and 5 illustrate the cleaning steam pipe 9 and the cleaning nozzle 11, the illustration of the protective cover 13 illustrated in FIGS. 3 and 4 is omitted. 2 and 5, the cleaning nozzles 11 are arranged at an equal pitch over the entire width direction of the net 4.

  This makes it possible to spray the steam uniformly over the entire width of the net 4 traveling in the direction of the arrow b (FIG. 5), and to remove the clogged raw material 20 over the net 4. Can do. For example, the interval between the central axes of the cleaning nozzles 11 may be 90 to 100 mm. In FIG. 2, the shape of the pressurized steam ejected from the cleaning nozzle 11 is not particularly limited. However, if the fan is ejected at an ejection angle of 90 degrees, the cleaning effect becomes better.

  As shown in FIGS. 1 and 2, the injection port 14 (FIG. 4) of each cleaning nozzle 11 is provided at a position where steam is injected from the back side of the loading surface of the raw material 20 onto the net 4. More specifically, in FIG. 1, the net 4 that has traveled in the direction of arrow a is folded back at the end of the net conveyor 10 and travels in the direction of arrow b opposite to the direction of arrow a. The net 4 that is traveling in the direction of the arrow b has the loading surface of the raw material 20 reversed relative to the net 4 that is traveling in the direction of the arrow a. For this reason, in FIG. 1 and FIG. 2, the steam from the injection port 14 is sprayed from the back side of the loading surface of the raw material 20 onto the net 4.

  Thereby, the raw material 20 clogged in the net 4 is blown off toward the bottom side of the steaming can 2 where the net 4 is not arranged. That is, the raw material 20 blown off from the net 4 is removed from the net 4 without remaining attached to the other parts of the net 4.

  On the other hand, when steam is jetted from the loading surface side of the raw material 20 to the net 4 that is traveling in the direction of arrow a, the raw material 20 that has been removed from the net 4 falls to the net 4 that is traveling in the direction of arrow b. . In this configuration, the raw material 20 is once removed from the net 4, but the removed raw material 20 is received by other parts of the net 4, and eventually the raw material remains inside the net 4. .

  FIG. 1 illustrates piping for supplying steam to the steam pipe 3 for steaming and the steam pipe 9 for cleaning. The steam generated in the boiler 21 is supplied to the steam pipe 3 for steaming through the pressure reducing valve 24 and the flow rate control valve 25. On the other hand, the steam generated in the boiler 21 is supplied to the cleaning steam pipe 9 through the pressure reducing valve 22 and the flow rate control valve 23.

  According to this piping configuration, the steam pressure of the steam injected from the steam nozzle 3a provided in the steam pipe 3 for steaming and the steam pressure of the steam injected from the cleaning nozzle 11 provided in the steam pipe 9 for cleaning are separately set. It becomes possible to adjust. By this adjustment, the vapor pressure of the vapor injected from the injection port 14 of the cleaning nozzle 11 is set higher than the steaming pressure (for example, 0.05 to 0.40 MPa) of the raw material 20, and the net from the injection port 14 of the cleaning nozzle 11 is set. It becomes possible to inject steam toward 4.

  According to this setting, the steam sprayed from the nozzle 14 of the cleaning nozzle 11 to the net 4 becomes pressurized steam having a blowing speed corresponding to the pressure difference from the steaming pressure of the raw material 20, and this pressurized steam is used for striking force. Thus, a cleaning effect can be obtained.

  Here, as the differential pressure between the vapor pressure injected from the injection port 14 of the cleaning nozzle 11 and the steaming pressure of the raw material becomes lower, the striking force becomes weaker and the cleaning effect is also reduced. Conversely, as the differential pressure increases, the striking force increases and the cleaning effect increases. On the other hand, if the differential pressure is too high, the cleaning effect is enhanced, but the striking force is too strong and the raw material may be scattered. Moreover, the pressurized steam blown into may become superheated steam, and the raw material may be baked onto the net. The raw material baked on the net will burn and cause contamination.

  Considering these points, it is preferable that the steam pressure from the injection port 14 of the cleaning nozzle 11 is set higher by 0.05 to 0.30 MPa than the steaming pressure of the raw material 20. As a result, the cleaning effect can be ensured while preventing scattering of the raw materials and seizing on the net.

  In the present embodiment, a part of the steam used for pressure steaming is used as cleaning steam. The steam sprayed through the cleaning steam pipe 9 is used for cleaning the net 4 and also contributes to pressurized steaming. For this reason, even if the net 4 is washed during the pressure cooking, the net 4 can be washed without reducing the energy efficiency of the pressure cooking. That is, according to the present embodiment, a cleaning function can be added without increasing the amount of energy to be input, and the efficiency of the apparatus can be increased.

  Moreover, since the net | network 4 is wash | cleaned during pressurization cooking, every time the net | network 4 passes the lower side of the washing nozzle 11, the clogging of the net | network 4 will be removed. For this reason, the clogging of the net 4 becomes temporary, and the clogging of the net 4 can be prevented from proceeding. Therefore, the problem that occurs due to the clogging of the net 4 being left is solved. That is, as described above, the problem that foreign materials are mixed due to the clogging of the clogged raw material, and the raw material in which the lower layer raw material is dipped in the moisture accumulated on the net 4 and the steaming is insufficient is discharged, and as a result, As a result, the quality of the steamed raw material will be improved.

  In the present embodiment, as shown in FIG. 3, the cleaning nozzle 11 attached to the cleaning steam pipe 9 is arranged to inject steam in two directions. Specifically, in FIG. 3, the cleaning nozzle 11 injects steam in the direction opposite to the traveling direction of the net 4 and the cleaning nozzle 11 a that ejects steam in the traveling direction of the net 4 (in the direction of arrow b). It comprises a cleaning nozzle 11b. The steam sprayed from the spray nozzles 14 of the cleaning nozzle 11a and the cleaning nozzle 11b is both blown to the net 4, and the material clogged through the net 4 through the net 4 is removed.

  Here, the reinforcing bars 15 are attached to the net 4 of the present embodiment at a predetermined pitch as shown in FIG. The steam ejected from the ejection port 14 of the cleaning nozzle 11a is also blown to the reinforcing bar 15. However, since the steam from the injection port 14 of the cleaning nozzle 11a is injected toward the traveling direction of the net 4 (the direction of the arrow b), the portion behind the standing portion of the reinforcing bar 15 (C in FIG. 3). Part), the sprayed spray is insufficiently sprayed.

  In the present embodiment, in addition to the cleaning nozzle 11 a, a cleaning nozzle 11 b having an injection direction opposite to the traveling direction of the net 4 is provided. Thus, steam is sprayed in advance on the portion (C portion in FIG. 3) that is behind the standing portion of the reinforcing bar 15 by the cleaning nozzle 11b. Therefore, in this embodiment, when the steam injection direction to the net 4 is one direction, the steam can be injected to the blind spot portion where the steam does not reach, and the cleaning effect can be further enhanced.

  In FIG. 3, the angle θa indicates the angle formed by the central axis of the cleaning nozzle 11 a and the vertical line orthogonal to the surface of the net 4, and the angle θb is orthogonal to the central axis of the cleaning nozzle 11 b and the surface of the net 4. The angle formed with the vertical line is shown. Although the angle θa and the angle θb do not have to be the same, the cleaning efficiency can be further increased by setting the angle θa and the angle θb in the range of 15 to 60 degrees, respectively. Furthermore, by shortening the distance between the cleaning nozzle 11 and the net 4 as much as possible, the striking force of the sprayed steam can be increased and the cleaning efficiency can be further increased.

  In FIG. 3, although the example which has arrange | positioned the washing nozzle in the position which injects a vapor | steam to both the advancing direction and the reverse direction of the net | network 4 was demonstrated, it does not restrict to this structure. For example, if the net 4 is a net without a member that causes a blind spot such as the reinforcing bar 15, the spraying direction of the cleaning nozzle 11 may be either the traveling direction of the net 4 or the reverse direction.

  Moreover, although the example which attached the washing | cleaning nozzle 11 to the one steam pipe 9 for washing | cleaning was demonstrated in FIG. 5, it does not restrict to this structure. FIG. 6 shows another example of the arrangement of the cleaning nozzles 11. In the example of FIG. 6, the cleaning nozzle 11 is attached to each of the two cleaning steam pipes 9 branched. The number of branches of the cleaning steam pipe 9 may be more than two.

  FIG. 7 shows still another example of the arrangement of the cleaning nozzles 11. In the example of FIG. 6, the pair of cleaning nozzles 11 a and the cleaning nozzle 11 b are arranged so that the respective central axes are separated from each other as they approach the net 4 to be ejected. In the example of FIG. It arrange | positions so that each central axis of 11a, 11b may mutually approach. That is, in the example of FIG. 6, steam is injected in an inverted V shape from the pair of cleaning nozzles 11a and 11b, but in the example of FIG. 7, steam is injected in a V shape. . In the example of FIG. 7, steam sprayed from the pair of cleaning nozzles 11 a and the cleaning nozzles 11 b can be concentrated at substantially the same location on the net 4.

  Next, in FIG. 1, the vapor injection direction from one of the pair of cleaning nozzles 11 is a direction toward the discharge port 8. For this reason, a part of the raw material 20 removed from the net 4 by the jet of steam from the cleaning nozzle 11 is discharged from the steaming can 2 through the discharge port 8. Thereby, the quantity of the raw material 20 which falls to the bottom part of the steaming can 2 can be reduced, and collection | recovery of the raw material 20 becomes easy.

  Further, the opening of the hopper 12 may be enlarged so that all of the raw material 20 removed from the net 4 is directed to the discharge port 8. FIG. 8 shows another example of the discharge port 8. The hopper 12 in this figure has a larger opening than the hopper 12 in FIG. Furthermore, the vapor | steam injection direction from the injection port 14 is made into the direction which goes to the discharge port 8 about both of a pair of washing | cleaning nozzles 11. FIG.

  Hereinafter, the present invention will be described more specifically with reference to examples. The pressurized steaming apparatus according to Example 1 has the same configuration as the pressurized steaming apparatus 1 of FIG. In FIG. 1, the raw material 20 was defatted soybean which is a raw material of soy sauce, and this was steamed with the capacity of 10 ton / Hr. The cooking time of the defatted soybean was 3 minutes, the cooking pressure was 0.20 MPa, and the cooking temperature at this time was 133 ° C.

  In FIG. 1, defatted soybeans fed from a raw material charging port 6 through a raw material charging side rotary valve 5 whose rotor rotates are supplied into the steaming can 2. The defatted soybeans are deposited on the net 4 and steamed for 3 minutes before being transferred to the raw material outlet 8. The amount of pressurized steam for steaming the defatted soybean was 5500 kg / Hr. Of these, 5150 kg / Hr was supplied from the steam pipe 3 for steaming and 350 kg / Hr from the steam pipe 9 for cleaning to the steam can 2 respectively. The pressure of the steam injected from the injection port 14 of the cleaning nozzle 11 for cleaning was set to 0.30 MPa, which is 0.10 MPa higher than the raw material steaming pressure of 0.20 MPa.

  The arrangement of the cleaning nozzles 11 in FIG. 1 was the same as that in FIG. As shown in FIG. 5, the cleaning nozzle 11 has cleaning nozzles 11 a and cleaning nozzles 11 b having different ejection directions arranged alternately. The total number of cleaning nozzles 11a and cleaning nozzles 11b was 25, arranged along the axial direction of the cleaning steam pipe 9, and the interval between the central axes of the nozzles was 100 mm. The amount of pressurized steam injected from one of the cleaning nozzles 11 was 14 kg / Hr. Further, the inclination angles θa and θb of the cleaning nozzle 11 shown in FIG.

  The operation of this embodiment is the same as that of the pressure steaming apparatus 1 shown in FIG. 1, and the steamed defatted soybean (raw material 20) conveyed to the vicinity of the hopper 12 passes through the raw material discharge side rotary valve 7 from the discharge port 8. Discharged from the steaming can 2. Similarly to the configuration of FIG. 1, the vapor injection direction from one of the pair of cleaning nozzles 11 is the direction toward the discharge port 8.

  When the raw material to be pressure-cooked is defatted soybean as in this embodiment, a part of the defatted soybean on the net 4 enters the mesh of the net 4 during the pressure-cooking and clogs the net 4. become. If the defatted soybean clogged in the net 4 is left for a long period of time, the defatted soybean is denatured into a gel and the clogging of the net 4 is further deteriorated.

  In this embodiment, since the net 4 is washed during the pressure cooking, the clogging of the net 4 is removed every time the net 4 circulates during the pressure cooking. When the clogging of the net 4 was visually inspected after the operation of this example, the clogging of the net 4 was not found, and it was confirmed that the clogging of the net 4 was removed during the pressure cooking.

  Further, as described above, when the clogging of the net 4 is left unattended, there arises a problem of quality deterioration such as mixing of foreign substances due to the clogged raw material. When the raw material discharged | emitted from the present Example was confirmed, quality was favorable and it has confirmed that the quality degradation by the above clogging neglecting did not arise.

  Example 2 changed only the kind of raw material 20 with respect to Example 1, and made other conditions the same. In this embodiment, the raw material 20 is pressed soybean. When the raw material 20 is pressed soybean, if the clogging of the net 4 is left untreated, the candy-like drain adheres to the net 4 and the lower layer raw material is immersed in the water accumulated on the net 4. . In this state, the raw material is not treated at the original cooking temperature, and the raw material that is not sufficiently cooked is discharged.

  When the clogging of the net 4 was visually inspected after the operation of Example 2, the clogging of the net 4 was not found, and it was confirmed that the clogging of the net 4 was removed during the pressure cooking. Moreover, when the raw material discharged | emitted from the present Example was confirmed, quality was favorable and it has confirmed that the quality degradation by the inadequate steaming by the above-mentioned clogging leaving was not produced.

DESCRIPTION OF SYMBOLS 1 Pressure cooking apparatus 2 Steaming can 3 Steam pipe for steaming 3a Steaming nozzle 4 Net 5 Raw material input side rotary valve 6 Raw material input port 7 Raw material discharge side rotary valve 8 Raw material discharge port 9 Washing steam pipe 10 Net conveyor 11, 11a, 11b Cleaning nozzle 12 Hopper 14 Injection port 20 Raw material 21 Steam boiler 22, 24 Pressure reducing valve

Claims (8)

A pressure steaming device for continuously steaming raw materials,
A net that circulates in the steaming can while conveying the raw materials,
It is equipped with a cleaning nozzle that injects steam into the net during pressurized steaming of raw materials,
The pressurized steaming apparatus, wherein the cleaning nozzle is provided at a position where steam is jetted from the back side of the raw material loading surface with respect to the net.   The pressure steaming apparatus according to claim 1, wherein the pressure of the steam sprayed from the cleaning nozzle is 0.05 to 0.30 MPa higher than the steaming pressure of the raw material.   The pressurized steaming apparatus according to claim 1 or 2, wherein the steam jetting direction from the cleaning nozzle is a direction in which steam sprayed from the cleaning nozzle is directed to a discharge port provided inside the steaming can.   The pressure steaming apparatus according to any one of claims 1 to 3, wherein the cleaning nozzle is provided at a position where the steam is jetted in both a traveling direction and a reverse direction of the net. It is a cleaning method of a pressure steaming device for continuously steaming raw materials,
The pressurized steaming device is equipped with a net that circulates in the steaming can while conveying the raw material,
A method for cleaning a pressurized steaming device, wherein steam is jetted from the back side of the material loading surface to the net during pressure cooking of the material to remove the material clogged in the net.   The pressure steaming device cleaning method according to claim 5, wherein the pressure of the steam sprayed onto the net is 0.05 to 0.30 MPa higher than the steaming pressure of the raw material.   The method for cleaning a pressurized steaming apparatus according to claim 5 or 6, wherein the direction of steam sprayed onto the net is a direction in which steam sprayed onto the net is directed to a discharge port provided inside the steaming can. The method for cleaning a pressure steaming apparatus according to any one of claims 5 to 7, wherein steam is jetted in both the traveling direction and the reverse direction of the net.

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