WO2019087931A1

WO2019087931A1 - Shell treatment device and shell treatment method

Info

Publication number: WO2019087931A1
Application number: PCT/JP2018/039714
Authority: WO
Inventors: 眞一下瀬
Original assignee: 株式会社下瀬微生物研究所
Priority date: 2017-10-30
Filing date: 2018-10-25
Publication date: 2019-05-09
Also published as: JP7015044B2; JP2019081129A

Abstract

[Problem] To provide a shell treatment device and a shell treatment method, which are capable of mass treatment of shells and reliably and easily removing foreign substances. [Solution] This shell treatment device 1 is configured to be provided with: a vacuum fermentation drying device 3 in which objects to be treated including shells are received in a tank 30 and stirred under a vacuum while being heated to a predetermined temperature range, organic components of the shells are decomposed using microorganisms, and a dry substance having a reduced volume is obtained; and a vibrating classifier for classifying the dry substance obtained from the vacuum fermentation drying device 3 into fine particles and coarse particles larger than the fine particles by means of a sieve, wherein the fine particles are stored in a storage container 61 and the coarse particles are introduced into the tank 30 to be subjected to vacuum fermentation drying again by means of the vacuum fermentation drying device 3.

Description

Shell processing apparatus and shell processing method

The present invention relates to a shell processing apparatus and shell processing method by reduced pressure fermentation and drying. In the present invention, “shell” refers to a shell of at least one shellfish of scallop, oyster, pearl oyster, abalone, clam, clam, clam, etc.

Conventionally, scallops, shells such as oysters, for example, are piled up in the field in large quantities as wastes, and the offensive odor caused by piling up of the fields has become one of the problems of waste treatment in local governments. Therefore, it is desirable to develop a technology that can process shells in large quantities and can effectively reuse the shells after processing. As a method of processing a large amount of shells, for example, processing using a crushing apparatus is known (see, for example, Patent Document 1).

In recent years, it has been considered to reuse shells as calcium additives such as feeds for livestock, but in this case, when processing shells, foreign substances (for example, plastics, metals, etc.) mixed into the object to be treated Must be removed reliably. For example, in the case of a scallop, the foreign matter mixed in the object to be treated includes a plastic string for hanging the scallop, a metal fitting, and the like.

JP 2017-137215 A JP 2007-319738 A

However, in the case of processing shells using a crushing apparatus, foreign substances are also finely pulverized, so it is difficult to remove foreign substances other than metals such as plastics after the crushing process. For this reason, as described in, for example, Patent Document 1, there is a problem that it is necessary to pre-sort shells and foreign substances by a shell washing process or the like as a process before the crushing process.

The present invention has been made in consideration of the above situation, and can process a large amount of shells such as scallops and oysters, for example, and can remove foreign substances reliably and easily. It is an object of the present invention to provide a shell processing apparatus and a shell processing method.

In the present invention, means for solving the above-mentioned problems are configured as follows. That is, according to the present invention, an object to be treated including shells is housed in a closed vessel, stirred while heating to a predetermined temperature range under reduced pressure, and decomposed organic components of shells using microorganisms to reduce volume. A vacuum fermentation and drying apparatus for obtaining a dried product, and a sieving apparatus for sieving the dried product obtained by the vacuum fermentation and drying apparatus into fine particles (for example, 2 to 5 mm in particle diameter) and large particles having a larger particle size. Shell processing apparatus, wherein the fine granules are stored in a storage container, and the large granules are put into the closed container, whereby the reduced-pressure fermentation of the large granules by the reduced-pressure fermentation drying apparatus is performed again. It is characterized in that the drying process is performed.

According to the shell processing apparatus of the present invention, for example, a large amount of shells such as scallops and oysters can be processed, and further, fine particles (shell powder) after processing can be treated with fertilizer, animal feed, antifreeze agent ( It can be effectively reused as an additive such as a snow melting agent) or a soil conditioner. Specifically, the reduced-pressure fermentation-drying apparatus can efficiently dry the shell, promote the decomposition of the organic component of the shell using microorganisms, and can also decompose the malodorous component. In addition, the particle size, the particle shape, and the like of this fine particle (shell powder) are obtained by sieving the dried product thus obtained into a fine particle with a small particle size and a large particle with a larger particle size by a sieving device. Since the moisture content becomes uniform and the generation of an offensive odor is also suppressed, it is suitable for additives such as fertilizers, livestock feed, antifreeze agents, soil conditioners and the like.

Furthermore, since the obtained fine particles (shell powder) contain microorganisms, it is also effective to spray the fine particles on shells stacked in the field. That is, there is an advantage that the malodorous components are decomposed by the microbes contained in the fine granules, and the surrounding environment is not deteriorated even if untreated shells are piled up in the field.

In addition to this, shells (dried matter) subjected to reduced pressure fermentation and drying in a reduced pressure fermentation and drying apparatus are mainly separated as fine particles, and homogenization is promoted by the fermentation and drying, and fertilizers, livestock feed, It can be effectively reused as an additive such as an antifreezing agent or a soil conditioner. Here, when the pretreatment object is not subjected to pretreatment such as pre-sorting, foreign substances such as plastic and metal are mixed in addition to the shell, but the plastic and metal are under reduced pressure fermentation by the reduced pressure fermentation dryer. As it is not degraded by microorganisms in the drying process, it is separated into large particles. Therefore, foreign substances such as plastics mixed in the object to be treated can be reliably and easily removed from the fine particles (shell powder) without performing pretreatment such as pre-sorting.

In addition, when dividing into fine particles and large particles, the dried product processed by the reduced-pressure fermentation drying apparatus has an advantage that sieving is easy because it has less water than that before the processing. It is more preferable to repeat the reduced-pressure fermentation drying process to the large-grained material several times more preferably. In this case, the dried matter which is not sufficiently decomposed by the microorganism is likely to be relatively large lumps, and is separated as large grains. Such large particles are further treated in a reduced pressure fermentation drying apparatus to further promote degradation by microorganisms to become fine particles. Therefore, it is only necessary to reuse this fine-grained material as an additive such as fertilizer, feed for livestock, antifreeze, soil conditioner and the like.

In the present invention, preferably, on the upstream side of the sieving device, a removal device for removing metal from the dried material obtained by the reduced pressure fermentation drying device is provided. In this case, the metal contained in the object to be treated can be reliably and easily removed from the fine particles (shell powder) by the removing device.

Further, the present invention is a shell processing method, wherein an object to be treated including a shell is contained in a closed vessel, stirred while heating to a predetermined temperature range under a reduced pressure, and organic components of the shell utilizing microorganisms Under reduced pressure fermentation and drying to obtain a reduced volume of the dried product, sieving to separate the dried product obtained by the reduced pressure fermentation and drying process into fine particles and larger particles, and the large particles It is characterized by including the re-processing process of performing again the reduced-pressure fermentation drying process with respect to the said large particle by throwing a thing into the said airtight container. In this case, it is preferable to repeat the reprocessing process a plurality of times. According to such a shell processing method of the present invention, the same effect as that of the above-described shell processing apparatus of the present invention can be obtained.

The shell processing apparatus and the shell processing method according to the present invention can process a large amount of shells such as scallops and oysters, and further, fine particles (shell powder) after the processing can be treated with fertilizer or animal feed It can be effectively reused as an additive such as antifreeze and soil conditioner. In addition, foreign substances such as plastics and metals mixed in the object to be treated are separated into large particles because they are not decomposed by microorganisms even if they are subjected to reduced pressure fermentation and drying. Therefore, foreign substances such as plastics mixed in the object to be treated can be reliably and easily removed from the fine particles without performing pretreatment such as pre-sorting.

It is a top view which shows schematic structure of the shell processing apparatus which concerns on embodiment of this invention. It is a front view of the shell processing apparatus of FIG. It is a side view of the shell processing apparatus of FIG. It is a schematic block diagram which shows typically the reduced-pressure fermentation drying apparatus of the shell processing apparatus of FIG. It is a schematic block diagram which shows typically the magnetic separator of the shell processing apparatus of FIG. It is a flowchart which shows an example of the driving | running procedure of the shell processing apparatus of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a schematic configuration of a shell processing apparatus 1 according to an embodiment of the present invention, FIG. 2 is a front view of the shell processing apparatus 1, and FIG. 3 is a side view of the shell processing apparatus 1.

As shown in FIGS. 1 to 3, the shell processing apparatus 1 includes a shell input device 2, a reduced pressure fermentation drying device 3, a discharge conveyor 4 and a vibrating sieving machine 5. The shell processing apparatus 1 inputs an object to be treated (raw material) including shells into the reduced pressure fermentation drying apparatus 3 by the shell feeding apparatus 2 and executes reduced pressure fermentation drying processing by the reduced pressure fermentation drying apparatus 3 to the input shells. The dried material obtained by the reduced pressure fermentation and drying process of the reduced pressure fermentation and drying apparatus 3 is separated by the vibrating sieving machine 5, and the separated fine particles are stored in a storage container, and the low pressure fermentation of the separated large particles is performed. The reduced pressure fermentation and drying process of the drying device 3 is repeated.

1 and 3 show, for example, a shell processing apparatus 1 in a state of being installed in a building 100, and a shell feeding apparatus 2, a reduced pressure fermentation drying apparatus 3, and a discharge conveyor 4 at a predetermined position in the building 100. And a vibrating sieving machine 5 are provided. In FIGS. 1 and 3, the wall, roof, shutter, etc. of the building 100 are indicated by a two-dot chain line. Further, in FIG. 1, the storage container 61 in which fine particles separated by the vibrating sieving machine 5 are stored is indicated by a two-dot chain line, and a plurality of storage containers 61 are used as empty spaces in the building 100. It is stored in an aligned state. Hereinafter, each apparatus with which the shell processing apparatus 1 is equipped is demonstrated.

The shell feeding device 2 supplies the shells (processing object) accommodated in the feeding box 21 to the feeding port 30 a of the reduced pressure fermentation drying device 3. The shell feeding device 2 is configured, for example, as a reversing type feeding device. The input box 21 is transported, for example, from a storage warehouse to a predetermined position of the shell input device 2 by a forklift F or the like. The loading box 21 set at the predetermined position of the shell loading device 2 is lifted upward along a pair of

rails

22 and 22 extending in the vertical direction by driving of an electric motor or the like (not shown). When the loading box 21 ascends to the upper end of the pair of

rails

22, 22, the loading box 21 rotates around a horizontal axis 23 provided between the pair of

rails

22, 22, and the loading box 21 is vertically inverted. With the reversing operation of the input box 21, shells (processing objects) accommodated in the input box 21 are input to the input port 30 a of the reduced pressure fermentation drying apparatus 3.

The reduced-pressure fermentation / drying apparatus 3 is a known apparatus as described in, for example, Patent Document 2 and the like, and the shell to be treated is stirred while heating to a predetermined temperature range under reduced pressure and using microorganisms. The organic components of the shell are decomposed to obtain a reduced-volume dried product. The dried material processed by the reduced-pressure fermentation drying apparatus 3 is sieved (fractionated) into fine particles and large particles having a larger particle diameter by a vibrating sieving machine 5 (sieving device) described later. ing.

The vacuum fermentation and drying apparatus 3 is a substantially cylindrical container airtightly formed so as to keep the inside at an atmospheric pressure or less, as a sealed container for containing shells supplied by the shell charging apparatus 2 as schematically shown in FIG. 4. Tank (pressure-resistant tank) 30 is provided. A heating jacket 31 is provided on a peripheral wall portion of the tank 30, and heating steam is supplied from the steam generation boiler 7 to the heating jacket 31. The temperature of the steam supplied from the steam generation boiler 7 is preferably, for example, about 140.degree.

Further, a stirring shaft 32 extending in the longitudinal direction (left and right direction in FIG. 4) is provided inside the tank 30 so as to be surrounded by the heating jacket 31. The stirring shaft 32 is rotated at a predetermined rotational speed by the electric motor 32a. The stirring shaft 32 is provided with a plurality of stirring plates 32b spaced apart in the axial direction, and the shells are stirred by these stirring plates 32b, and after completion of the fermentation and drying, the shells are in the longitudinal direction of the tank 30. It is supposed to be sent.

At the upper center of the tank 30 in the longitudinal direction, a shell feeding port 30a supplied from the shell feeding device 2 is provided, and the shell loaded from the charging port 30a is stirred while being heated by the heating jacket 31. It is agitated by the rotation of the shaft 32. Then, after a predetermined time has elapsed, the treated shells (dried matter) are discharged from the discharge unit 30 b provided at the lower part of the tank 30. A hydraulic motor may be used instead of the electric motor 32a.

In the upper part of the tank 30, a guide portion 30c for projecting steam generated from the heated shell to the condensation portion 33 is provided in a protruding manner. In the present embodiment, two guides 30c are provided, and each guide 30c is disposed on each side of the tank 30 in the longitudinal direction with the inlet 30a interposed therebetween. The condenser unit 33 includes a plurality of cooling pipes 33 b supported by a pair of heads 33 a, and a cooling water passage 80 is provided between the plurality of cooling pipes 33 b and the cooling tower 8. In the present embodiment, the condensing portion 33 extends in parallel along the longitudinal direction of the tank 30, and the condensing portion 33 is disposed on the rear side of the inlet 30a and the guiding portion 30c.

Then, the cooling water which flows in the cooling pipe 33b in the condenser section 33 and whose temperature has risen by heat exchange with high temperature steam flows in the cooling water passage 80 as schematically shown by the arrows in FIG. It flows into the 8 water receiving tank 81. The cooling tower 8 is provided with a pumping pump 82 for pumping the cooling water from the water receiving tank 81 and a nozzle 83 for injecting the pumped cooling water. The cooling water jetted from the nozzle 83 receives air from the fan 85 while flowing down the flow lower portion 84, and its temperature is lowered, and then flows into the water receiving tank 81 again.

The cooling water cooled by the cooling tower 8 is supplied by the cooling water pump 86, sent to the condenser 33 by the cooling water passage 80, and circulated again through the plurality of cooling pipes 33b. Then, after the temperature rises due to heat exchange with the steam generated inside the tank 30 as described above, it flows again through the cooling water passage 80 and flows into the water receiving tank 81 of the cooling tower 8. That is, the cooling water circulates through the cooling water path 80 between the condenser 33 and the cooling tower 8.

In addition to the cooling water circulating as described above, in the cooling tower 8, the condensed water, in which the steam generated from the heated shell is condensed in the condensing part 33, is also injected. Although not shown, condensed water generated by heat exchange with high-temperature steam is collected below the condensation unit 33. Further, a vacuum pump 36 is connected to the condensing section 33 via a communication passage 35 so that the pressure in the tank 30 is reduced.

That is, by the operation of the vacuum pump 36, air and condensed water are sucked out of the condensation section 33 through the communication passage 35, and further, the air and steam in the tank 30 are sucked out through the communication passage 34 and the guide portion 30c. . Thus, the condensed water is sucked from the condensation section 33 to the vacuum pump 36, and is led to the water receiving tank 81 of the cooling tower 8 from the vacuum pump 36 by the water conduit.

Thus, the condensed water led to the water receiving tank 81 of the cooling tower 8 mixes with the cooling water and is pumped up by the pumping pump 82 as described above, and after being jetted from the nozzle 83, it is cooled while flowing down the downstream portion 84. . The condensed water contains the same microorganisms as those added to the shell in the tank 30, and the odor component etc. contained in this condensed water is decomposed, so that the odor does not escape to the outside of the tank It has become.

The shells contained in the tank 30 are stirred as the stirring shaft 32 rotates while being heated by the heating steam supplied to the heating jacket 31. Then, heating from the outside by the heating jacket 31 surrounding the inside of the tank 30 and heating from the inside by the stirring shaft 32 and the like effectively heats the shells contained in the tank 30, and also stirs. The shell 32 is agitated by the shaft 32. In addition, since the pressure is reduced by the operation of the vacuum pump 36, the boiling point is lowered in the tank 30, the evaporation of water is accelerated, and the decomposition of the organic component of the shell is promoted by the microorganism.

In the reduced pressure fermentation and drying step by the reduced pressure fermentation and drying apparatus 3, one step (one cycle) is preferably, for example, 2 hours, and the organic components of the shell are first decomposed over 30 minutes. When the pressure in the tank 30 is reduced to −0.06 to −0.07 MPa (gauge pressure; hereinafter, the gauge pressure is omitted), the water temperature in the tank 30 is maintained at 76 to 69 ° C. (saturated vapor temperature). As a result, the shell is promoted to be fermented and decomposed by the microorganisms described later.

Next, it takes 1.5 hours to dry the shell during fermentation. Therefore, when the pressure in the tank 30 is further reduced to −0.09 to −0.10 MPa, the water temperature in the tank is maintained at 46 to 42 ° C. (saturated vapor temperature), and drying of the shell is sufficiently promoted. And when performing such a drying process, as microorganisms which are added to the shell in the tank 30, as described, for example in patent document 2, it was based on several types of indigenous bacteria, and this was precultured. A complex effective microorganism group is preferred, commonly known as the SHIMOSE 1/2/3 group at the center of the colony.

In addition, SHIMOSE 1 is March 14, 2003 to FERM BP-7504 (Patent Microorganisms Depositary Center, Institute of Technology for Industrial Science and Technology, Institute of Industrial Technology, Research Institute for Biotechnological Research, Institute of Technology and Technology, Ibaraki Prefecture, Japan). (The one deposited internationally). In addition, SHIMOSE 2 is a microorganism belonging to FERM BP-7505 (as deposited internationally as in SHIMOSE 1), Pichiafarinosa resistant to a salt, and SHIMOSE 3 is a microorganism belonging to FERM BP-7506 (SHIFOSE 1 and Similarly, those deposited internationally) are microorganisms that belong to Staphylococcus (Staphylococcus).

The discharge conveyor 4 conveys the dried product after the treatment under reduced pressure fermentation and drying by the reduced pressure fermentation and drying device 3 toward the vibrating sieving machine 5. That is, the dried material discharged from the discharge part 30b of the tank 30 lower part of the decompression fermentation dryer 3 by the discharge conveyor 4 is conveyed to the vibrating sieve 5 provided at a position higher than the discharge part 30b. A magnetic separator 41 is provided in the middle of the discharge conveyor 4 and the magnetic separator 41 removes metal fittings such as metal pieces and iron pieces contained in the dried material.

The magnetic separator 41 is, for example, a hanging type, and is suspended on the discharge conveyor 4 as schematically shown in FIG. The magnetic separator 41 adsorbs metal members (shown by black circles) such as metal pieces from the dried material conveyed by the discharge conveyor 4 by magnets, and continuously discharges the discharge container by the belt 41b moving between the pulleys 41a. It is configured to discharge to 41c.

The vibrating sieving machine 5 is for sieving the dried matter discharged from the reduced-pressure fermentation drying apparatus 3 and conveyed by the discharge conveyor 4 into fine grains and large grains having a larger particle size. The vibrating screen 5 is provided with a wire mesh 51 having a mesh of a predetermined size and a vibration motor 52 for vibrating the wire mesh 51. The vibrating sieve 5 is supported on the lower base 54 by a plurality of (for example, four) coil springs 53. In addition, the wire mesh 51 is provided obliquely downward, and one end side (left end side in FIG. 3) of the wire net 51 is provided at a position lower than the other end side (right end side in FIG. 3) ing. In the present embodiment, the fine particles are a dried product having a particle diameter of, for example, 5 mm or less, and the mesh of the wire mesh 51 is 5 mm × so as to correspond to the upper limit (5 mm) of the particle diameter of the fine particles. The size is set to 5 mm. The particle size (5 mm or less) of the fine particles is an example, and any other value may be used as long as the upper limit of the particle diameter of the fine particles is 2 to 5 mm. In other words, the particle size of the fine particles is preferably 5 mm or less, for example, and more preferably 2 mm or less.

As described above, since the vibrating screen 5 is floatingly supported by the coil spring 53 with respect to the lower base 54, the dried matter supplied from the discharge conveyor 4 to the wire mesh 51 by the drive of the vibrating motor 52 becomes fine particles. It is sieved to larger particles having a larger particle size. Specifically, the fine particles pass through the mesh of the wire mesh 51 and fall downward, and are temporarily stored in the storage container 61 disposed below the vibrating sieving machine 5. When a predetermined amount of fine particles is accumulated in the storage container 61, the storage container 61 is replaced, and the fine particles are accumulated in a new storage container 61. The storage container 61 in which a predetermined amount of fine particles are accumulated is stored in an empty space in the building 100.

On the other hand, since large particles can not pass through the mesh of the wire mesh 51, they move to one end side (forward side) while rolling along the inclined surface of the wire mesh 51, and are stored in the storage container 62 arranged in the lower front of the vibrating sieving machine 5. It is temporarily stored. The large particles accumulated in the storage container 62 are conveyed to the shell feeding device 2 by a forklift F or the like, and again introduced into the reduced pressure fermentation drying device 3 from the inlet 30a by the shell insertion device 2, and large particles by the reduced pressure fermentation drying device 3. Another reduced pressure fermentation and drying process is performed. That is, large particles are not decomposed by microorganisms as compared with fine particles, so they can be obtained as fine particles by again charging the large particles into the reduced pressure fermentation drying apparatus 3 and fermenting and drying again. It is like that. The re-injection of the large-grained material into the reduced-pressure fermentation drying apparatus 3 is performed after the completion of the reduced-pressure fermentation drying process for one lot of objects to be treated. In the present embodiment, such a large-scaled product is repeatedly subjected to the reduced-pressure fermentation / drying treatment a plurality of times.

Next, the operation procedure of the shell processing apparatus 1 (the procedure of the shell processing method) will be described with reference to the flowchart of FIG. As shown in FIG. 6, the shell processing method according to the embodiment of the present invention at least includes a reduced pressure fermentation and drying step, a screening step, and a reprocessing step. In the present embodiment, pretreatment such as prior sorting of shells and foreign matter, and crushing of shells by a crushing apparatus are not necessary.

First, in step S1, a processing object including shells is introduced into the reduced pressure fermentation drying apparatus 3. At this time, the lid of the inlet 30a of the tank 30 of the reduced pressure fermentation and drying apparatus 3 is opened, and the shell housed in the box 21 by the shell loader 2 is inserted from the inlet 30a. Then, the lid of the inlet 30a is closed, and the inside of the tank 30 is sealed at atmospheric pressure.

Next, the heating steam is supplied from the steam generation boiler 7 to the tank 30 (heating jacket 31 or the like). Then, the vacuum pump 36 is operated to suck the air and the condensed water from the condensing unit 33. As a result, the inside of the tank 30 is depressurized through the communication passage 34 and the guide portion 30c, and the boiling point of water is lowered to promote evaporation, and the latent heat thereof lowers the temperature in the tank 30.

As a result, the temperature in the tank 30 can be reduced earlier than natural heat radiation, and the processing time can be shortened. Then, when the temperature in the tank 30 decreases to some extent, the process proceeds to step S2, and the operation of the vacuum pump 36 is stopped, and the atmosphere release valve (shown in FIG. Omission).

Then, the outside air flows into the communication passage 35 from the atmosphere release valve, and the pressure in the condensation portion 33, the communication passage 34, the guide portion 30c, and the tank 30 quickly becomes atmospheric pressure. Further, due to the flow of the gas at that time, a part of the microorganisms remaining in the condensation section 33 and the cooling tower 8 will be brought into the tank 30. In addition, since the inside of the tank 30 is at the atmospheric pressure, it is also conceivable to open the inlet 30a and input a predetermined microorganism.

Thus, in step S 2, after a predetermined microorganism is added to the shell in the tank 30, the air release valve is closed to seal the inside of the tank 30. Then, in step S3, the inside of the tank 30 is heated under reduced pressure to promote fermentation and drying of the organic components of the shell contained therein (reduced pressure fermentation and drying step). That is, the heating steam is supplied from the steam generation boiler 7 to heat the inside of the tank 30.

Thus, the inside of the tank 30 is heated by the heating steam, the stirring shaft 32 is rotated at a predetermined rotation speed (for example, about 8 rpm), and the inside of the tank 30 is decompressed by the operation of the vacuum pump 36. The temperature in the tank 30 becomes the optimum activity environment of the microorganism, and the decomposition of the organic component of the shell by the microorganism is suitably promoted. In addition, the rotational speed (8 rpm) of the stirring shaft 32 is an example, Comprising: As long as decomposition | disassembly of the organic component of a shell is possible, it may be another value.

Thus, while maintaining the temperature and pressure in the tank 30, when a predetermined time (for example, about 2 hours) elapses, the operation of the vacuum pump 36 and the steam generation boiler 7 is stopped while the stirring shaft 32 is reversed. The lid 30 is rotated, the lid of the discharge part 30 b of the tank 30 is opened, and the dried matter is discharged from the tank 30. At this time, the dry matter discharged from the tank 30 is reduced in volume.

Next, in step S4, the dried matter discharged from the tank 30 is conveyed to the vibrating sieving machine 5 by the discharge conveyor 4, and the dried sifting machine 5 operates to dry the dried matter into fine particles and larger particle sizes. Sieve into large particles (sieving process). That is, as described above, the dried product is suitable for sieving by being fermented and dried and reduced in volume, and the dried product is conveyed by the discharge conveyor 4 and introduced into the vibrating sieving machine 5. In the middle of the conveyance by the discharge conveyor 4, the magnetic separator 41 removes the metal.

The fine particles (shell powder) screened by the screening step are temporarily stored in the storage container 61 (step S5). On the other hand, although large particles other than fine particles are temporarily stored in the storage container 62, it is determined in step S6 whether or not the reduced-pressure fermentation drying process has been repeated a preset number of times (for example, 5 times). In the case of a negative determination (NO), the process returns to step S3. That is, large particles other than the fine particles are re-introduced into the reduced-pressure fermentation drying apparatus 3, and the reduced-pressure fermentation drying process for the large particles is repeated a set number of times (re-processing step). The recharging of the large-grained material to the reduced-pressure fermentation drying apparatus 3 is performed after the low-pressure fermentation drying step and the sieving step for one lot of objects to be processed are completed. Then, in the case of affirmation determination (YES) in step S6, the large granular material stored in the storage container 62 is mainly plastic etc., so it is discharged to the outside without being reinjected into the reduced pressure fermentation dryer 3 (step S7). In addition, the setting frequency | count (5 times) which repeats a decompression fermentation drying process is an example, Comprising: It is possible to change suitably according to the kind of shell, and the quantity of shell per lot.

As described above, in the present embodiment, the dried product obtained by the reduced-pressure fermentation drying apparatus 3 is separated by the vibrating sieving machine 5, and the separated large particles are reprocessed by the reduced-pressure fermentation drying apparatus 3. For example, a large amount of shells such as scallops and oysters can be treated, and further, fine particles (shell powder) after the treatment can be treated as fertilizers, animal feed, antifreeze agents (snowmelt agents), soil conditioners, etc. It can be effectively reused as an additive. This point will be described below.

That is, the shell can be efficiently dried by the reduced-pressure fermentation / drying apparatus 3, and the decomposition of the organic component of the shell can be promoted by using the microorganism, and the malodorous component can also be decomposed. In addition, the particle size of this fine particle (shell powder), the particles, is determined by sieving the dried product thus obtained into fine particles with a smaller particle size and larger particles with a larger particle size by a vibrating sieving machine 5. Since the shape, moisture content, etc. become uniform, and the generation of malodor is also suppressed, it is suitable for additives such as fertilizers, livestock feed, antifreeze agents, soil conditioners and the like. Furthermore, since the obtained fine particles (shell powder) contain microorganisms, it is also effective to spray the fine particles on shells stacked in the field. That is, there is an advantage that the malodorous components are decomposed by the microbes contained in the fine granules, and the surrounding environment is not deteriorated even if untreated shells are piled up in the field.

In addition to this, shells (dry matter) subjected to reduced pressure fermentation and drying in the reduced pressure fermentation and drying apparatus 3 are mainly separated as fine particles, and homogenization is promoted by the fermentation and drying, and fertilizers and livestock feed It can be effectively reused as an additive such as antifreeze and soil conditioner. Here, when the pretreatment object is not subjected to pretreatment such as pre-sorting, foreign substances such as plastic and metal are mixed in addition to the shell, but the plastic and metal are reduced in pressure by the reduced pressure fermentation dryer 3 As it is not degraded by microorganisms in the fermentation and drying process, it is separated into large particles. Therefore, foreign substances such as plastics mixed in the object to be treated can be reliably and easily removed from the fine particles (shell powder) without performing pretreatment such as pre-sorting.

In addition, when dividing into fine particles and large particles, the dried product processed by the reduced-pressure fermentation drying apparatus 3 has an advantage that sieving is easy because the water content is smaller than before the processing. It is more preferable to repeat the reduced-pressure fermentation drying process to the large-grained material several times more preferably. In this case, the dried matter which is not sufficiently decomposed by the microorganism is likely to be relatively large lumps, and is separated as large grains. By reprocessing such large particles in the reduced pressure fermentation drying apparatus 3, the decomposition by microorganisms is further promoted to become fine particles. Therefore, it is only necessary to reuse this fine-grained material as an additive such as fertilizer, feed for livestock, antifreeze, soil conditioner and the like.

Further, in the present embodiment, the magnetic separator 41 for removing metal from the dried material obtained by the reduced-pressure fermentation dryer 3 is provided on the upstream side of the vibrating sieving machine 5. The metal mixed in the object can be reliably and easily removed from the fine particles (shell powder).

The presently disclosed embodiments are illustrative in all respects and not restrictive of interpretation. The technical scope of the present invention is not interpreted only by the embodiments described above, but is defined based on the description of the claims. Further, the technical scope of the present invention includes all modifications within the meaning and scope equivalent to the claims.

The shell loading device 2 described above is an example, and shells may be loaded into the reduced pressure fermentation drying device 3 by a shell loading device having another configuration. For example, the shells may be introduced into the reduced pressure fermentation drying apparatus 3 using a conveyer or the like. Moreover, the magnetic separator 41 mentioned above is an example, Comprising: You may use magnetic separators other than a suspension type. For example, a magnetic separator such as a pulley type or a drum type may be used, or an eddy current magnetic separator capable of removing non-ferrous metals such as aluminum may also be used. Moreover, the vibrating sieving machine 5 mentioned above is an example, Comprising: The sieving process of a dried material may be performed by the sieving apparatus of another structure.

The operation procedure of the shell processing apparatus 1 shown in FIG. 6 is an example, and the shell processing apparatus 1 may be operated by another procedure.

This application claims the priority based on Japanese Patent Application No. 2017-209163 filed in Japan on October 30, 2017. By reference to this, the entire content of which is incorporated into the present application.

The present invention can be used for a shell processing apparatus and shell processing method by reduced pressure fermentation and drying.

1 Shell processing apparatus 3 Reduced pressure fermentation drying apparatus 30 tank (sealed container)
41 Magnetic separator (removal device)
5 Vibrating sieve machine (sieving device)
61 Reservoir containers

Claims

An object to be treated including shells is housed in a closed vessel, and stirred while heating to a predetermined temperature range under reduced pressure, and microorganisms are used to decompose organic components of shells to obtain a reduced-volume dried product A drying device,
A shell processing apparatus comprising a sieving device for sieving a dried material obtained by the reduced-pressure fermentation drying device into fine particles and large particles larger than the small particles.
The fine-grained material is stored in a storage container, and the large-grained material is charged into the closed container, whereby the reduced-pressure fermentation drying process is performed again on the large-grained material by the reduced-pressure fermentation dryer. Shell processing device characterized by
In the shell processing apparatus according to claim 1,
The above-mentioned fine-grained material has an upper limit value of particle diameter of 2 to 5 mm.
In the shell processing apparatus according to claim 1 or 2,
A shell processing apparatus characterized in that the reduced-pressure fermentation / drying treatment for the large particles is repeated several times.
The shell processing apparatus according to any one of claims 1 to 3.
A shell processing apparatus characterized in that a removing device for removing metal from the dried material obtained by the reduced-pressure fermentation drying device is provided on the upstream side of the sieving device.
An object to be treated including shells is housed in a closed vessel, and stirred while heating to a predetermined temperature range under reduced pressure, and microorganisms are used to decompose organic components of shells to obtain a reduced-volume dried product A drying process,
A sieving step of sifting the dried product obtained by the reduced pressure fermentation and drying step into fine particles and larger particles;
And c. Re-processing step of carrying out the reduced-pressure fermentation drying process again on the large-grained matter by charging the large-grained matter into the closed container.
In the shell processing method according to claim 5,
A shell processing method characterized in that the reprocessing step is repeated a plurality of times.