JP3263438B2 - Continuous starch dispersion gelatinizer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous starch in which powdery starch is dispersed in a solvent such as fresh water to form a starch dispersion, and this dispersion is continuously heated and gelatinized. The present invention relates to a dispersing and gelatinizing apparatus.

[0002]

2. Description of the Related Art As an apparatus for dispersing a starch powder in fresh water to obtain a starch dispersion, there has conventionally been an apparatus shown in FIG.

FIG. 3 is a schematic diagram showing a flow of a conventional apparatus. The starch powder and fresh water are supplied to the dispersion tank 31,
Stirring is performed by the stirring device 32 to obtain a starch dispersion by batch processing. This starch dispersion is stored in a storage tank 35 via a three-way valve 34 by a circulation pump 33. The storage tank has a stirring device 36, and the starch dispersion is stirred. The starch dispersion in the storage tank is sent to a gelatinization step (not shown) by a slurry pump 38 via a three-way valve 37. Valves 39 and 40 are closed during operation of the device. Fresh water can be supplied from the conduit 41 as needed.

[0004] The storage tank has a liquid level controller (not shown) and excess starch dispersion is applied to a three-way valve 34.
To the dispersion tank.

[0005] The supply of the starch powder to the dispersion tank is as follows.
In some cases, a fixed amount is continuously fed by a belt feeder or the like, but the starch dispersion is obtained by batch processing as described above.

[0006]

The above-mentioned conventional apparatus for obtaining a starch dispersion by batch processing has a tank for storing a starch dispersion in addition to a dispersion tank for dispersing starch powder in water. Therefore, a large installation space is required.

In addition, certain types of starch or polyvinyl alcohol (PV) which swell or gelatinize in cold water
A), a mixture of poly (magnesium acrylate) (PAM) and other water-soluble polymer substances and starch has a high viscosity in the dispersion tank 31 and the storage tank 35. Therefore, continuous gelatinization cannot be performed with a conventional apparatus using a non-positive displacement pump.

[0008] An object of the present invention is to provide a continuous starch dispersing and gelatinizing apparatus which solves the above-mentioned problems of the prior art.

[0009]

According to the present invention, the above object can be achieved by the following continuous starch dispersing and gelatinizing apparatus.

A cone having a conical or frustoconical interior space
A container and a solvent for supplying a solvent flow to a large diameter portion of the internal space;
A supply port, wherein the solvent flow is in contact with a large diameter portion of the internal space.
A starch dispersion tank that is supplied in a linear direction, a solvent supply unit that supplies a solvent to a solvent supply port of the starch dispersion tank, and a starch supply that supplies starch powder to a large-diameter portion of the internal space of the starch dispersion tank. and parts, the internal space of the front Kiori powder dispersion tank
The suction port is directly connected to the small diameter section between the
The starch powder supplied to the internal space is separated into the solvent flow thus obtained.
The starch dispersion obtained by dispersion is sucked and sent from the outlet to the downstream side.
A displacement pump issue Ri, sent to the downstream side of the displacement pump
A continuous starch dispersion gelatinization device comprising a starch dispersion heating section for heating the discharged starch dispersion.

[0011] The starch supply preferably comprises a hopper and a screw feeder directly connected to the bottom thereof.

The apparatus preferably has a solvent supply section for supplying the solvent downstream of the positive displacement pump and upstream of the heating section.

[0013] The apparatus preferably has a solvent supply section for supplying the solvent downstream of the heating section.

[0014] Preferably, the heating section is capable of freely controlling the heating temperature.

[0015]

The starch content in the continuous starch dispersion gelatinization apparatus of the present invention
The dispersion tank is a cone with a conical or frusto-conical internal space.
A container and a solvent for supplying a solvent flow to a large diameter portion of the internal space;
A supply port, wherein the solvent flow is in contact with a large diameter portion of the internal space.
It is intended to be supplied to the linear direction, before the said solvent feed ports
Supplying the solvent stream to serial starch dispersion tank, solvent flow becomes swirling flow descends while swirling along the inner wall of the conical container of the <br/> starch dispersion tank. The starch powder can be uniformly dispersed in the solvent only by dropping the starch powder into the swirling flow of the solvent.

In the positive displacement pump, the amount of the starch dispersion obtained from the starch dispersion tank from the inlet side can be set to be equal to or slightly larger than the supply amounts of the solvent and the starch powder to the starch dispersion tank. The starch dispersion can be continuously sent out from the outlet side without requiring a liquid level controller of the dispersion tank.

When the supply amount of the solvent and the starch powder to the starch dispersion tank is smaller than the discharge amount of the positive displacement pump, select a positive displacement pump capable of discharging the dispersion liquid even if air is mixed in from the suction side. use.

If a positive displacement pump is not provided, only a starch dispersion having a concentration of up to about 5% by weight can be obtained, but if a positive displacement pump is provided, a starch dispersion of 10% by weight or more can be obtained. Further, when the positive displacement pump is indirectly connected to the starch dispersion tank via a pipe, the pipe and the flow rate must be at least a certain flow rate to prevent starch settling of the starch dispersion. However, by connecting the positive displacement pump directly to the small diameter portion of the cone of the starch dispersion tank, the starch dispersion can be delivered at a lower flow rate and flow rate.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The starch dispersion tank comprises a conical container. That is, the tank has a conical or frustoconical space inside. Therefore, the outer shape of the tank may be something other than a cone.

The position where the starch powder is added to the swirling flow of the solvent is as follows:
Preferably, it is a fan-shaped region R having a central angle of 90 ° surrounded by a straight line Y parallel to a straight line X passing through the central axis O of the conical container and orthogonal to the solvent flow (see FIG. 2).

A positive displacement pump is a pump of the type in which a fluid is sent from an inlet side to an outlet side by movement or change of a closed space generated between a casing and a movable member inscribed therein. Preferably, it is a rotary displacement pump. These pumps include a gear pump, a screw pump, and a vane pump, and more preferably a single-shaft eccentric screw pump.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing the flow of an example of the continuous starch dispersion and gelatinization apparatus of the present invention. FIG. 2 is a schematic sectional view of the starch dispersion tank in the radial direction of the large diameter portion of the cone.

The starch powder is supplied to the hopper 1. The hopper has a starch powder level controller (not shown) and adjusts so that the upper surface of the starch powder is between the upper limit H and the lower limit L.

A screw feeder 2 is provided on the bottom of the hopper.
Is connected directly, and the starch powder in the lower part of the hopper is introduced, and the starch powder is supplied to the starch dispersion tank 3 continuously and in a constant amount.

Fresh water as a solvent is supplied from a conduit P0.
The conduit P0 is divided into fresh water supply pipes P1, P2 and P3, each of which can supply fresh water.

The starch dispersion tank 3 composed of a conical container has a conical internal space having a central axis in the direction of gravity, and a solvent supply port 4 for supplying a solvent flow in a tangential direction of a large diameter portion of the cone.
And an inspection port 5 for inspecting the inside of the tank.

The solvent supply port 4 is connected to the fresh water supply pipe P1 and is tangential to the large-diameter portion of the cone of the tank defining the conical internal space (a circular shape perpendicular to the central axis of the conical internal space). A constant amount of fresh water flow F is continuously supplied in the tangential direction of the cross section.

The fresh water flow supplied from the solvent supply port 4 descends while swirling along the inner wall 3a of the dispersion tank to form a swirling flow. The starch powder supplied by the screw feeder is dropped from the upper part of the dispersion tank into the swirling flow of fresh water in the large diameter portion of the cone of the dispersion tank, and the starch powder is uniformly dispersed in the fresh water. The preferred supply position of the starch powder is shown in FIG.
This is the area indicated by.

The portion above the solvent supply port of the starch dispersion tank is not necessarily required to be sealed, but may be formed sealed except for the portion for supplying the starch powder.

The positive displacement pump 6 (Moisno pump of Heissin Co., Ltd., a rotary positive displacement uniaxial eccentric screw pump) is directly connected to the bottom of the dispersion tank to suck the starch dispersion obtained in the dispersion tank at the lower part of the dispersion tank. Inhaled through the mouth and continuously sent out from the outlet in a constant amount. Incidentally, the Heinshin mono pump can discharge the dispersion without any problem even if air is mixed in from the suction side.

To the starch dispersion sent out from the positive displacement pump, if necessary, fresh water can be supplied through a fresh water supply pipe P2, diluted to a desired concentration, and sent to the gelatinization step.

The starch dispersion liquid is heated by the heater 7 by supplying steam to gelatinize. Heating of the heater is performed by introducing steam from the conduit P4. The temperature is controlled by adjusting the amount of steam introduced into the heater with a TIC (temperature indicating controller) 8 and a valve 9 so that the temperature of the gelatinized starch dispersion at the pipe A point becomes a desired temperature. Do. Preferably, a heater that can stably gelatinize even if air is mixed is selected and used.

As the heater, for example, Japanese Utility Model Publication No. Sho 61-3
A dispersion mixing apparatus as described in JP-A-8652 and JP-B-63-34774 can be used. These dispersing and mixing apparatuses are apparatuses for heating by dispersing and mixing steam in a starch dispersion.

After passing point A of the pipe, if necessary, fresh water can be supplied to the gelatinized starch dispersion from the fresh water supply pipe P3, and then the gelatinized starch dispersion can be supplied from the discharge pipe P5 via the three-way valve 10. Can be obtained.

The valves 11, 12 and 13 are valves for controlling the supply of fresh water to the fresh water supply pipes P1, P2 and P3, respectively.

Reference numerals 14, 15 and 16 are flow meters.

The check valves 17 and 18 prevent backflow of fresh water in the fresh water supply pipes P2 and P3, respectively.

Reference numeral 19 denotes a fresh water supply pump (spiral pump) for supplying fresh water to the pipes P1, P2 and P3.

[0040]

The continuous starch dispersing and gelatinizing apparatus of the present invention has a cone shape.
A conical container having an inner space of a truncated cone,
It has a solvent supply port for supplying the solvent flow to the large diameter part of the space,
The solvent stream is supplied tangentially to the large diameter portion of the internal space.
A starch dispersion tank, a solvent supply unit for supplying a solvent to a solvent supply port of the starch dispersion tank,
And starch supply unit for supplying the starch powder into the large diameter portion of the internal space, sucked into the small diameter portion of the internal space of the front Kiori powder dispersion tank
The mouth is directly connected and forward to the solvent flow supplied to the interior space
The starch obtained by dispersing the starch powder supplied to the internal space
A positive-displacement pump that sucks the powder dispersion liquid and sends it from the outlet to the downstream side, and a starch component that is sent downstream of the positive-displacement pump.
Since it is composed of a starch dispersion heating section for heating the dispersion, a process of uniformly dispersing the starch powder in a solvent to form a starch dispersion and subsequently gelatinizing the dispersion can be performed continuously. And even a small amount of starch dispersion can be continuously obtained and gelatinized.

Further, the continuous starch dispersion gelatinization apparatus of the present invention comprises:
Since the starch dispersion tank does not require a stirrer and a liquid level controller, and further does not require a storage tank for the starch dispersion liquid, the apparatus can be downsized and the installation space can be reduced.

Further, according to the apparatus of the present invention, starch which swells or gelatinizes in cold water or a mixture of polyvinyl alcohol, poly (magnesium acrylate) or another water-soluble polymer substance and starch is continuously glued in a small space. Can be

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a flow of an example of a continuous starch dispersion gelatinization apparatus of the present invention.

FIG. 2 is a tangential sectional view of a large diameter portion of a cone of a starch dispersion tank comprising a cone container according to the present invention

FIG. 3 is a schematic diagram showing a flow of a conventional starch powder dispersion device.

Continuation of front page (72) Inventor Atsushi Sakakibara 6-15-15 Honcho, Funabashi-shi, Chiba Oji National Co., Ltd. (56) References JP-A-64-51130 (JP, A) JP-A-1-174501 ( JP, A) JP-A-62-27401 (JP, A) JP-A-49-7443 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A21C 1/00

Claims (5)

(57) [Claims] 1. A cone having a conical or frustoconical interior space.
A container and a solvent for supplying a solvent flow to a large diameter portion of the internal space;
A supply port, wherein the solvent flow is in contact with a large diameter portion of the internal space.
A starch dispersion tank that is supplied in a linear direction ; a solvent supply unit that supplies a solvent to a solvent supply port of the starch dispersion tank; and a starch supply that supplies a starch powder to a large diameter portion of the internal space of the starch dispersion tank. parts and, before the suction port connects <br/> directly to the small diameter portion of the internal space of Kiori powder dispersion tank, said solvent stream supplied to the inner space
Starch obtained by dispersing the starch powder supplied to the head space
A positive displacement pump that sucks the liquid dispersion and sends it from the outlet to the downstream side, and a starch dispersion sent to the downstream side of the positive displacement pump.
A continuous starch dispersing and gelatinizing device comprising a starch dispersion heating section for heating. 2. The continuous starch dispersing and gelatinizing apparatus according to claim 1, wherein said starch supply section comprises a hopper and a screw feeder directly connected to a bottom thereof. 3. The continuous starch dispersion gelatinization apparatus according to claim 1, further comprising a solvent supply section for supplying a solvent downstream of the positive displacement pump and upstream of the heating section. 4. The continuous starch dispersion and gelatinization apparatus according to claim 1, further comprising a solvent supply section for supplying a solvent downstream of the heating section. 5. The continuous starch dispersing and gelatinizing apparatus according to claim 1, wherein the heating unit is capable of freely controlling a heating temperature.