JP2002537967A - Treatment tank for non-forced treatment of organic material and method thereof - Google Patents

Abstract

The treatment tank is a double tank with an inner tank that is rotatably supported by bearings on an outer tank about a substantially vertical axis of rotation and has a wall area with holes. A grid is provided in the perforated area of the inner tank, and a shovel is arranged at an angle in the space between the inner and outer tanks. The shovel agitates the fluid in the tank during rotation of the inner tank. Further, the lid is configured to move up and down above the inner tank. This lid is also preferably provided with a grid. The invention also relates to a method for treating organic material such as fish waste, crab husk, krill or plant material using a treatment tank according to the invention.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a treatment tank for performing a gentle treatment of organic materials, in particular of organic materials such as fish waste, crab, krill, or plant material. Further, the present invention relates to a method for treating an organic material.

[0002]

[Prior art]

In a processing environment such as a fish processing plant, it is necessary to process raw materials efficiently and gently so as to achieve even greater cleanliness with maximum production. However, when a normal stirring assembly including, for example, a fixed stirrer is used, a part of the material to be recovered is also crushed and lost together with the treated water. Further, the extract may be contaminated by particles from the residue. Further, there is another problem that a part of the extract remains in the residue and there is a loss as compared with the theoretical production amount.

[0003] There are many actual applications of such treatment tanks, for example, for removing waste in a fish processing plant, treating krill on a trawling fishing boat, and the like. Another example of application is in the extraction of essential oils from plant material.

[0004] Accordingly, it is an object of the present invention to solve or substantially alleviate the above-mentioned problems, to facilitate efficient and gentle treatment of organic materials, and to make conventional extraction possible without impairing product quality. It is an object of the present invention to provide a new and improved processing tank capable of producing more than the amount of extracted material. Another object of the present invention is to enable changes such as automatic control,
It is an object of the present invention to provide a processing tank which is very well adapted to industrial activities which increase the overall economics of the processing.

[0005]

SUMMARY OF THE INVENTION These and other objects are achieved by a treatment tank for gently treating the contents. In particular, the treatment tank is intended for the treatment of organic materials, including means for stirring, wherein the treatment tank has a wall area rotatably supported on a substantially vertical axis of rotation by a bearing in an outer tank and provided with holes. It is a double tank with an inner tank, a lattice is provided in the area where the hole of the inner tank is provided, and a shovel is provided in a space between the inner tank and the outer tank at an angle, and the shovel is It plays the role of stirring the fluid in the tank during rotation of the inner tank, and is provided with a lid arranged up and down on the upper part of the inner tank, and the lid is also provided with a lattice. .

Further, according to the present invention, it is preferable that the material is put into a processing tank together with a controlled amount of a processing liquid and the material is processed under a known condition, so that the material is gently stirred. A method for treating organic materials such as fish waste, crab husks, krill or plant material, having a grid-like wall area with perforations and being rotated by bearings on a generally vertical axis of rotation to the outer tank. Using a dual treatment tank with a possibly supported inner tank; selecting a grid whose mesh size is such that all solid material remains in the inner tank; treatments such as temperature and pH Controlling the variables according to the nature of the process involved; rotating the inner tank relative to the outer tank, the shovel between the inner and outer tanks gently agitating the material Agitating the processing liquid by removing the liquid from the tank; and compressing the solid material at the end of the processing by means of raising and lowering the lid on the inner tank before or during discharging the processing liquid from the tank. I do.

[0007] Preferred embodiments and methods of the invention are disclosed in the dependent claims.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 shows a double tank 1 according to the invention.
And has a fixed wall 2 for the outer tank, a wall 3 provided with a hole for the inner tank, and common bearings 4 and 5 for both tanks centered on the vertical axis RR. The outer tank has a lid 6 and the inner tank preferably has a perforated lid 7, which is arranged so as to be able to move downwardly with respect to the tank about a spline shaft 15. The lids 6,7 are both reinforced by cavelles 30. Below the tank, a ball plug valve 8 is shown, by which the material is introduced into the tank and processed, so that residues are removed after processing.

A shovel 9 is shown between the inner wall 3 and the outer wall 2, a part of which is mounted inside the outer wall 2 and a part which is mounted outside the inner wall 3. As the inner tanks rotate, they cooperate to agitate the fluid in the tank. Although the impeller 10 is shown below the inner tank, the size and shape of the impeller changes the manner of stirring the contents of the tank. Some applications may include a scraping shovel indicated by reference numeral 11 in FIG. A supply conduit 12 for pumping water is shown at the top of the tank, as well as a conduit 13 for supplying, for example, nitrogen (N ₂ ) to the bottom of the tank. Further, FIG. 1 shows a throttle valve 14 located at the bottom of the tank for discharging the extract.

FIGS. 2 a and 2 b show the inner tank, the inner wall 3, the axis of rotation RR, the lid 7, the shovel 9 (which is fixed outside the inner tank), the support structure of the inner tank Detailed details, such as the impeller 17 and also the grid 18 in the open area of the tank wall, are also shown in FIG. A helical groove 19 for guiding the lid 7 as it moves up and down is also shown. The guide groove 19 is provided in the tank wall 3
It is located inside. The guide groove 19 functions like a “thread” of the lid 7. The top of the tank has a manhole which is almost always sealed by a watertight and airtight lid. Dotted lines L _t and L _b indicate the top and bottom of the lid 7. FIG. 2b shows a caster 23 configured to cooperate with the guide groove 19 during the upward and downward movement of the lid.

FIG. 3 shows a lid 7 having a perforated area 20 covered by a grid, a distribution pipe 21,
A rubber hose 22 (four shown in the drawing) for supplying the cleaning liquid to the ejection pipe 24 via the supply pipe 12 (FIG. 1) by a special device is shown. The arrow on the left side of FIG.
Indicates the direction of rotation for normal operation. The drawing also shows a branch line of the distribution pipe 21, and the distribution pipe 21 is connected to a carrier arm 2 from a shaft connected to a chemical resistant rubber pipe 22 or the like.
5 and the distribution pipe extends from the supply pipe 21 along the circumference of the lid to the ejection pipe 2.
4. These (rubber hoses) do not suffer particularly severe wear because they only move downward in proportion to the rotation when the lid is lowered.

The grid 18 can be replaced with one having the desired mesh size depending on the type of material to be treated. Since the stirring in the tank is performed by rotation of the inner tank, the stirring between the outer tank and the inner tank is performed by the shovel 9, but is optionally performed by the impeller 10 at the bottom of the inner tank. In a preferred embodiment of the present invention, the impeller 10 at the bottom of the inner tank is designed to be able to push liquid from the center of the tank to the outside to the wall, while the gap between the inner and outer tanks Excavators are designed to lift liquid upward in the area between the two walls. The overall effect is an overall downward movement of the liquid in the center of the tank and effective but gentle agitation. The impeller 10 may be provided inside the inner tank as shown in the drawing, or may be provided outside or part of the inside tank, and partly outside the inside tank.

[0013] In order to be able to move the liquid to the fullest extent, it is necessary to perforate and cover the substantial area of the inner tank with a grid and that only the support structure gives the tank strength and rigidity. Good enough to provide. Therefore, it is preferable to make a hole in the lid 7 of the inner tank and provide the grid 18. The inner lid is arranged so that it can descend into the inner tank. Connect the central bush 29 (Fig. 2b) to the spline shaft 1.
The simplest method is to provide a hydraulic brake device to lower the spline shaft 15 by delaying it relative to the rotation of the inner tank. Due to the outer guiding groove 19 on the inner wall of the inner tank, the lid is always kept in a horizontal position with respect to the tank during operation. To maximize the versatility, the lid 7
It is preferable to provide a certain type of caster 23 that rolls along the guide groove 19 when the lid moves up and down. These guide grooves 19 are, in a preferred embodiment, configured such that the lid 7 rotates half a turn as the inner tank moves from the top to the bottom. The rise angle of the guide groove must not exceed 27 degrees.

As shown in FIG. 3, it is also preferable to provide a jet tube 24 inside the lid 7, the jet tube comprising a series of nozzle openings. The purpose of this arrangement is to clean or shower the walls of the inner tank while the lid 7 is descending, to collect all the residue at the bottom of the inner tank, and to allow the remaining solid material to adhere to the grate 18 or guide channel 19 to allow Ensure that the descent is not blocked. This also prevents the remaining solid substance from remaining on the top of the lid 7 when the lid 7 is lowered. The supply of liquid is most conveniently performed through a hole in the central shaft. The rinsing liquid is usually taken from the processing tank by a pump.

The most important purpose of the function of lowering the lid 7 is to make it easier to control the compression of the raw materials / residues in the tank before draining the extract and to keep the residue of the extract as small as possible. . This can prevent the residue from acting as a filter that blocks a part of the material to be flown together with the extract. Firmly holding the material also stabilizes the tank, allows for higher rotational speeds, and improves centrifugation of the residue.

The most practical way to attach the inner tank is to attach it to the upper end with a carrier arm 25 and connect the carrier arm 25 to a pinion shaft. Lid 7
Can be attached to the spline shaft 15 by a so-called spline bush 29. The outer lid is reinforced with a cover bell 30 and is attached to the outer tank in a watertight and airtight manner, preferably by bolts.

According to another preferred embodiment of the invention, the spline shaft 15 is provided with a central hole in which the scraping shovel 11 is centrally located in the inner tank, preferably for receiving said shaft 27 for the scraping shovel 11. Is mounted on a shaft 27 passing through the center of the shaft. The function of the scraper is to remove material from the inlet / outlet opening 8 in the center of the bottom of the tank. The scraper is only activated when needed, so that no automatic control is required.

At the start of the general process, the raw materials are introduced into the inner tank via the ball plug valve 8. The outlet of the extract is located close to the inlet opening of the raw material and may be in the form of a throttle valve. This is charged to another tank for further processing.

The simplest way to empty a tank of solid material is to fill the tank with a liquid,
Rotating the tank in the opposite direction to normal operation while keeping the lid on top.

It is also convenient to supply gas to the tank. Most commonly, an inert gas is added to prevent oxidation of the raw materials, but it is also possible, if desired, to add a special purpose gas such as an additive. One or more gas supply devices may be provided for this purpose and as needed.

[0021] A drain is provided at the bottom of the lower bearing so that the bearing liquid can be drained before maintenance or replacement. In the bearing, the liquid may be drained during prolonged downtime of the tank or even before changing the extract.

With respect to the arrangement of the rotation axes R-R, a certain degree of displacement is possible in principle from a completely vertical arrangement, but there is a disadvantage with respect to the strain on the tank and its bearings when the inner tank rotates at high speed. Become.

The rotational speed of the tank can be varied within wide limits, but is usually set so that the absolute speed is in the range of 0.5-1 m / s around the tank in general processing. After processing is complete, the residue is centrifuged to remove as much processing liquid as possible. During centrifugation, the absolute speed of the circumference is usually 3.5-6 m / s.

A processing tank according to the present invention typically includes a number of well-known devices for controlling processing variables, primarily temperature and liquid levels. These devices include quite simple electric heaters, heat exchangers and / or pipe devices for adding the above to the tank.
In a typical application, a steam loop 31 covering substantially the entire bottom conical portion with an inlet 32 is located below the outer tank just above the conical portion. The outlet for the concentrate is located near the bottom valve of the tank. The entire loop 32
It is arranged at a vertical distance of, for example, 10 cm from the bottom of the cone and is configured to ensure contact between the vapor loop and the extract. It is also possible to provide a steam jacket around the entire tank for heating. For optimal use of energy, the extract from the vapor loop may be circulated through an external heat exchanger to assist in heating the extract, and similar equipment may be used to supply the extract to the tank. It may be heated in advance.

The structure of the inner tank may be further reinforced so that the material can be further compressed as the lid 7 descends.

The dimensions of the tank may vary within wide limits and, in practice, are limited only by the needs of the actual application.

Next, an example of use of the tank will be described. Example 1 Fish Waste Ensilage Raw material consisting of fish waste from a fish processing plant is charged into a tank according to the invention and the inner tank is set to rotate. The raw materials enter the tank with the inner hole from the center 8 at the bottom of the tank. Treated water and blood are separated from the raw materials in the tank and pumped out through outlet. Once the tank is properly filled, water and acid are added to the desired concentration via a perforated supply tube 26 following the shovel 9 on the outer tank. Thus, the acid is evenly distributed from top to bottom. The tank is heated to a suitable temperature to produce ensilage. During processing, the lid 7 can be lowered as required or desired. After completing the encirage generation, the lid 7
While the wall 3 of the inner tank is washed through the opening in the tube 24, and then the ensilage is pumped from the outlet 14 until there is no liquid in the tank. Thereafter, the rotation speed is increased and the remaining material is centrifuged to obtain an ensilage. Then, when pumping out the remaining material, the rotation direction of the inner tank is reversed, and the lid 7 is raised to its uppermost position. Then, an appropriate amount of water is sent into the tank, and the remaining material is pumped through valve 8 for further processing or disposal.

Example 2 Crab / Shrimp Husk The shell is ground in a crusher before being introduced into the tank via valve 8. When the inner tank is full, add water and heat to the desired temperature. An appropriate enzyme may be added. Liquid additives, such as acids, and the main components are added via the supply pipe 26 along the shovel 9 of the outer tank to the desired concentration. If the action of the enzyme works as desired,
The lid 7 is lowered and the resulting liquid is pumped out through the outlet 14 of the outer tank, and the shell is centrifuged to remove any remaining liquid. The liquid is then further processed, for example into a flavor. Similar to what was described in Example 1, it is preferred to rinse the inner tank wall 3 while lowering the lid.

[0029] Raise the lid to the top and fill the tank with water. Once filled, heat to the desired temperature and add the acid to the desired concentration. The shell is desalted and then chitin under controlled conditions with the addition of acid as desalination proceeds. When the desalination is complete, the lid 7 is lowered and at the same time the wall 3 of the inner tank is washed and the liquid is drained from the tank via the outlet 14 of the outer tank. Next, the residual material is centrifuged. Thereafter, the lid is again raised to its top and water is added to wash the shell. The lid is lowered again and the rinse water is pumped out through the outlet 14 of the outer tank. Once the chitin is finally pumped out, the process is handled as described in Example 1. That is, the tank is filled with water, and the inner tank is reversely rotated with the valve 8 opened to discharge the chitin.

Example 3 Plant Material for Extracting Essential Oils The relevant plants / herbs are introduced from the valve 8 or the manhole 20 in the form of a suspension which can be pumped into a tank. Add the desired extract. Heat the tank to the desired extraction temperature. During extraction, the lid 7 can be lowered if necessary or desired.
After the extraction, the lid 7 is lowered and the extract is pumped out from the outlet 14. Prior to fresh extraction or before discharge of the material via valve 8, the residual material is centrifuged and compressed.

Example 4 Krill In this example, it is convenient to install the tank on a krill trawler. Once the krill has been caught, the krill meat is squeezed out in the usual way. Krill waste is
Thereafter, the tank is charged from the valve 8 and when the inner tank is full, the tank is preferably filled with seawater. Heat the liquid to the desired temperature. Here, shell autolysis takes place. When autolysis is complete, all proteins are dissolved. next,
The lid 7 descends, compresses the shell and at the same time cleans the wall 3 of the inner tank, then pumps out a protein-rich and oily liquid from the outlet 14,
Process in some cases. Centrifuge the remaining shell in the tank to remove as much protein-rich oily liquid as possible. Thereafter, the procedure of filling the tank, preferably with fresh water, washing and pumping the shells is repeated. After draining the rinsing water from the tank and centrifuging the shell, the tank is again filled with fresh water, acid is added to the desired concentration as in the previous example, and the shell is desalted. The tank is heated to the desired temperature and the acid concentration and temperature are kept constant during the entire desalination process. After one to four hours, usually when this process is complete, the lid 7
To compress the shell / chitin and pump the mineral-rich liquid from outlet 14 of the outer tank. Once the tank is completely drained, reverse the direction of rotation and
Raise the lid to its top and fill the tank with water to wash the chitin. The chitin is washed, compressed and the rinsing water is pumped out of outlet 14. After all (free) rinse water has been removed, the chitin is centrifuged to remove residual water. Finally, fill the tank with water and raise the lid to the top. The chitin is pumped through the inlet / outlet 8 of the inner tank with the direction of rotation reversed.

The above example merely illustrates an example of using a processing tank. The scope of the present invention is:
It shall be limited only by the appended claims.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the tank according to the invention, in which details located outside the section are indicated by dotted lines.

2a is a side view of the inner tank of the tank shown in FIG. 1, showing the grid and the support structure.

FIG. 2b is a side view of the inner tank of the tank shown in FIG. 1, with other details highlighted by omitting the grid and support structure.

FIG. 3 is a top view of a lid of an inner tank.

──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D004 AA04 CA03 CA13 CA15 CA34 CA40 CB08 CB09 CB15 CB21 CB26 CB31 CB50 CC03 CC12 DA02 DA06 DA20 4D056 AB12 AB14 AC22 BA04 CA07 CA11 CA13 CA18 CA22 CA28 CA33 CA36 CA39 CA40 DA01 A10G10 AB09 BA05 CA03 DA30 EA10

Claims (20)

[Claims] 1. A processing tank comprising a stirring means for performing a gentle processing of its contents, in particular of an organic material, wherein said processing tank is provided with a substantially vertical rotating shaft (R) by a bearing on an outer tank. -R), wherein the inner tank (3) comprises an inner tank (3) rotatably supported and having a wall area with holes.
A grid (18) is provided in the area where the holes are provided, and a shovel (9) is provided at an angle in a space between the inner tank and the outer tank. A lid (7) that serves to stir the fluid in the double tank during rotation and that is arranged up and down on the upper part of the inner tank, and a grid is also provided on the lid. The processing tank described above. 2. The inner tank (3) being rotatably supported by an upper bearing (5) in a lid (6) of the outer tank, and a lower bearing (4) mainly comprising: The processing tank according to claim 1, wherein the processing tank functions as a guide for the inner tank. 3. The processing tank according to claim 1, wherein the raw material inlet and the solids are removed via a conduit communicating with a valve (8) arranged concentrically with the lower bearing. 4. A fixed shovel, wherein a part of said shovel (9) between inner and outer walls (3, 2) is fixedly arranged inside said outer wall (2),
The processing tank according to claim 1, characterized in that the remainder is a shovel mounted on the outside of the inner wall (3), which rotates with the inner tank. 5. The lid (7) of the inner tank is supported by a bush (29) on a spline shaft (15) or the like, the spline shaft being concentric with the double tank. The processing tank according to claim 1, wherein the lid (7) is arranged so as to be able to descend by a braking mechanism of the spline shaft (15). 6. A nozzle tube (24) is mounted along the circumference of said lid (7), said nozzle tube covering said wall (3) of said inner tank, in particular said lid (7).
2. The processing tank according to claim 1, wherein the cleaning is performed in conjunction with the lowering of (1). 7. An impeller (10) located at the bottom of the inner tank moves the extract from the center of the inner tank outward from the wall of the inner tank (3), and the liquid moves through a grid (18). Excavator (9) passing between the inner (3) and outer (2) walls
The treatment tank according to claim 1, wherein the treatment tank passes through the treatment tank. 8. A shaft (15) for said lid (7) is provided with a hole, through which a shaft of a scraping shovel (11) which can be lowered during packing is arranged, and a valve is provided. The processing tank according to claim 1, wherein a material covering an inlet / outlet communicating with (8) is scraped. 9. A guide groove (19) is arranged inside said inner tank (3) and cooperates with a groove or casters (23) on said lid (7) to move the lid up and down. The treatment tank according to claim 1, wherein the treatment tank guides and functions as a thread of the lid. 10. A perforated tube (26) is located along the entire length of one or more of said excavators (9) on said outer tank (2) to supply the desired chemical. The processing tank according to claim 1, wherein 11. It is preferred that the material is introduced into a processing tank together with a controlled amount of processing liquid, and the material is processed under known conditions, so that the material is gently agitated. For treating organic material such as fish waste, crab husks, krill, or plant material; having a grid-like wall area with holes and generally vertical to the outer tank by bearings Using a dual treatment tank with an inner tank rotatably supported on a rotating shaft; selecting a grid whose mesh size is large enough to leave all solid material in the inner tank; controlling process variables, such as pH, by the nature of the process involved; rotating the inner tank relative to the outer tank, wherein a shovel between the inner tank and the outer tank removes material. Agitating the processing liquid by facilitating agitation; compressing the solid material at the end of the processing by means of raising and lowering the lid on the inner tank before or during discharging the processing liquid from the processing tank The method of claim 1 wherein the method comprises: 12. When the inner tank rotates and the lid is at the top,
The method according to claim 11, characterized in that the filling of the material takes place at the bottom of the processing tank via a filling valve located concentric with the bottom valve and the axis of the processing tank. 13. The method according to claim 11, wherein the treatment liquid is an extract.
The method described in. 14. Rinsing the wall of the inner tank with water via a nozzle located below the lid which is movable during the whole or part of the treatment period,
The method according to claim 11. 15. The method according to claim 11, wherein the residue is centrifuged and / or compressed after completion of the treatment. 16. The method of claim 11, wherein the lid of the inner tank moves up and down at regular intervals during processing. 17. The method of claim 11, wherein when the solid material in the processing tank is emptied, the direction of rotation of the inner tank is reversed. 18. The method of claim 11, wherein liquid is drained from another outlet at the bottom of the outer tank that is not in communication with the inner tank. 19. The method according to claim 19, wherein the solid material is pumped into a tank together with a carrier liquid such as water, and the carrier liquid can be circulated while transporting the solid into the tank. The method according to claim 11. 20. The method according to claim 11, wherein the rinsing liquid supplied to the nozzle tube along the lid of the inner tank is removed from the processing tank.