JPH0275601A - Manufacture of large starch particle and multi-stage precipitation tank, bleaching tank, apparatus for removing impurities and drying device that are used therefor - Google Patents

Abstract

PURPOSE:To obtain large starch particles excellent in water retention, etc., by removing starch from the liquid containing ground potato, separating only a starch having a large specific gravity, transferring it to a bleaching tank, mixing it with Ca- or Mg-containing fresh water, removing impurities, and drying it at a low temperature. CONSTITUTION:Potato is washed, ground, and separated into starch refuse and starch slurry. The separated slurry 11 is poured into a multi-stage precipitation tank 2, and starches 13 and 13A are precipitated. Only the starch 13 having a large specific gravity is transferred into a bleaching tank 3, a suitable amount of a fresh water containing carcium or magnesium is added to the starch, and after stirring the starch is washed with water. The starch is settled to separate into a first white powder precipitated in the lower part and a second brown powder precipitated in the upper part. The first powder is introduced into an apparatus for removing impurities contained in the powder, then the water is removed, and the resulting raw powder is dried at a low temperature for a long period of time of obtain large starch particles.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a method for producing large-particle starch having two-stage swelling properties and various apparatuses used directly in this production method. ′ [Prior Art] The conventional method for producing starch is as follows. 1) Process with a centrifuge without using a sedimentation tank. 2) Purify starch using fresh water in a short time. 3) There is no step to remove impurities at the stage of stagnant emulsion. 4) The streamlined airflow drying method uses high temperatures and finishes drying instantly. [Problems to be Solved by the Invention] The conventional techniques described above have the following problems. 1) Large grain starch cannot be extracted.In other words, since the process is carried out using a centrifuge without using a sedimentation tank, the starch contained in the raw material mixes from large grains to small grains (see Figure 23). ). 2) It is not possible to produce starch with two-step swelling properties, that is, to purify starch using fresh water in a short time;
It is not affected by various ions contained in fresh water. Therefore, the swelling remains at one stage and the degree of swelling is also large. 3) It is difficult to remove impurities from starch milk. That is, there is no step to remove dust at the emulsion stage, so impurities such as dust cannot be removed at the emulsion stage. 4) It is not possible to dry without breaking the starch crystals and without losing the flavor and sweetness of starch. In other words, the flash drying method finishes drying at high temperatures and instantaneously, resulting in crushed particles and loss of flavor. , the sweetness also disappears. The present application has been made in view of the problems of the prior art, and its purpose is to provide a device that can do the following. The aim is to obtain large-grain starch with a large water-holding capacity and flavorful starch. [Means for Solving the Problems] In order to achieve the above object, the present invention is as follows. We succeeded in separating large starch (starch with heavy specific gravity), which is difficult to extract, using a multistage precipitation method. The separated large grain starch is milky. By repeatedly washing the starch with fresh water (groundwater) containing calcium or magnesium ions for a long period of time, it was possible to create starch with bound calcium or magnesium ions. Furthermore, the contaminants contained in the starch, which was still in the form of an emulsion, could be removed by a combination of a filter and a gear pump. By drying on a shelf at low temperature (around 70°C) for a long time (more than 4 hours), it was possible to produce unpowdered starch that retains flavor and sweetness without breaking the starch crystal grains. The starch made using the method described above has some grains left over, although some of the starch has matured. [Effect] This will be explained along with the effects. [Embodiments of the Invention] Potatoes, which are the raw materials for the first step, are washed (here, the example is carried out using 30,000 kg of potatoes as raw materials). Since this process is a known technique, illustrations are omitted. Second step: Grind the raw material. Grinding speed 1000kg/H. Grind while adding 2a+37H of clean water. Since this process is also a known technique, illustrations are omitted. 3rd step Separate the juice after grinding into lees and side holes (while adding 8rn'/I+ of fresh water). This third step includes the following 21! There are similar methods. [Method-1] (See Figures 1 and 2) 1 is the lees and the side holes.
This is a separation device. IA is a through net that receives the grinding juice from above, and is swung by a motor IA1 and a swinging claw IA2 so as to collide against the colliding table IA3. 1B is a container that receives a side hole located below the above-mentioned passage net. The IC is a container placed behind and below the screen to receive the starch meal. In the figure, ID indicates fresh water, 10 indicates the juice after grinding, 11 indicates the side hole, and 12 indicates the dregs. In addition, the mesh size of the mesh is 40. Pass fine threads in order, such as #60, #80, and #100, and use #150 as the final finishing thread. [Method-2] Since this is a known technique, detailed explanation will be limited to the following. The rationalization factory uses a combination of high-speed centrifuges (machine names include Jet Extra, Drafter, Sieve Bend, and Load Sive) to separate lees and side holes. The fourth step side hole is poured into the multi-stage settling tank 2 to precipitate starch. The above multi-stage sedimentation tank 2 is as follows: 2A1, 2A2, 2A3゜2A4, 2A5
．． 2A6 is a settling tank with a volume of 6-3. 2B1. 2B2. 2B3. 2B4゜2B5
．． 286 is a pipe connecting the sedimentation tank. The side hole 11 obtained in the previous step is injected into the sedimentation tank 2A1 at a speed of 12 m'/H. ! When the milk No. 11 fills the sedimentation tank 2A1, it flows into the sedimentation tank 2A2 through the pipe 2B1. In this way, the side hole is submerged up to the sedimentation tank 2A6. The liquid exiting the settling tank 2A6 is discarded as waste liquid 14. The above steps are continued for 30 hours and stopped for 5 hours (to completely precipitate the starch in the liquid). Starch 13 with a heavy specific gravity is precipitated in the settling tanks 2A1 and 2A2, and starch 13A with a light specific gravity is precipitated in the settling tanks 2A5 and 2A.
6. Step 5: The starch is washed with water in the sarashi tank 3. Before washing with water (exposing), the following pre-processes are performed. Only the precipitate 4fi 2 A 1 in the multi-stage settling tank 2 and the starch 13 with heavy specific gravity precipitated in the tube 281 are exposed 4! ! 3 to B
vinegar. Add Shimizu 6m' containing calcium (5 girt or more) or magnesium (Ssg/j! or more) and stir until completely dissolved (see Figures 5 and 6). The bleaching tank 3 is composed of a bleaching tank main body 3A with a fixed capacity, a shaft 3B rotatably arranged at the center of the bleaching tank main body, and a stirring rod 3C connected horizontally to the lower part of this shaft. ing. The speed of stirring is 15 to 30 p■. 3D is the amount of deceleration - 3. In the 6th step, the powder is separated into No. 1 powder and No. 2 powder. That is, after the completion of the 5th step, the stirring rod 3C is stopped. As a result, as shown in Fig. 7, it is separated into white 1st grade powder 4A at the bottom and brown 2nd grade powder 4B at the top. Pour the same clean water as in Step 5 and stir. Then, repeat Step 6, remove No. 2 powder 4B again, and repeat Steps 5 and 6 again. Seventh Step Seventh Step At the same time, dehydration is performed while removing foreign matter (garbage) that has come off from the sedimentation tank, dissolution tank, etc. There are the following three methods. , with reference to Figure 9, 5A is the filter body, and 5A1 is the filter body, which is composed of numerous holes with a diameter of 51 cm arranged in groups on the outer circumferential surface of a stainless steel tube with a sealed tip. 5A2 indicates a mesh to be placed around the filter body 5A1 (the size of the mesh is 60 to loo). In the figure, 5B is a stirring rod, 5C is a gear pump, 5D is a dehydrator, and 5E is a container. Pour about 313 g of the same clean water as in the 5th step into the No. 1 powder obtained in the 6th step and stir to completely dissolve and form the side hole. Suction the side hole with a gear pump (performance 0.111 m'/mln). At that time, the impurities in the starch are caught in the net 5A2.The side hole sucked by the gear pump is drained to a water content of 30 to 4H by a dehydrator to obtain raw flour. [Method-2] Other Examples Referring to Figs. 10 and 11, the contaminant removal device 6 is a submersible pump (6A has a performance of 0.011 m"/5 in), and 6B is a submersible pump (performance: 0.011 m"/5 in).
indicates a through net (No. 150), this structure is the third step [
This method is the same as that described in "Method-1". 6C indicates a submersible pump (performance 0.13m'/5in). 6D is a stirring tank, 6E is a dehydrator, and 6F and 6G are stirring rods. Pour about 3×3 of the same clean water as in the 5th step into the No. 1 powder obtained in the 6th step and stir to completely dissolve and form a side hole. The side hole is suctioned with the submersible pump 6A and placed on the passage net 6B. Contaminants are caught in the net, and the side holes from which the contaminants are removed are stored in a stirring tank. The side hole is suctioned with a submersible pump 6C, and the water is drained to 30 to 40% by a dehydrator to obtain raw flour. [Method-31-11 Easy method The contaminant removal device 7 of another embodiment is shown in FIG. 12,'! Referring to figure J13, 7A is a submersible pump (performance 0.13m" 7m1n), 7B is a dehydrator, and 7C is a stirring rod. Add about 3g+ of the same clean water as in the 5th step to the 1 flavor powder obtained in the 746th step. ' Inject and stir to completely dissolve and form a side hole. Set the submersible pump 7A at a height of 50 cg+ or more from the bottom of the dissolution tank as shown in Figure 13. Impurities contained in the starch will be removed from the water. Most of the powder is heavy. The side holes are sucked with an underwater pump A, and the water is drained to 30-40% using a dehydrator to obtain raw flour. In addition, the above [Method-1] or

Among [Method-3], [Method-1] has the advantage that it can remove impurities from the system in a short time and perform dehydration at the same time, compared to [Method-2]. . Furthermore, compared to [Method-3], impurities can be removed more reliably. Eighth Step The raw flour obtained in the seventh step is dried at a low temperature (70° C. or lower) for a long time (1 hr or more). There are four methods below. [Method-1] 8 is a mechanical semi-automatic fence drying type drying device (see Figs. 14 and 15; Fig. 16). Figure 14 shows that fresh flour and dry flour are being replaced. 8A indicates a metering hopper, which drives a conveyor 8A1 with a motor (not shown). 8B indicates the main body of the fence-type dryer, and 8B1 indicates a fence made of iron plate with a thickness of 0.5 mm. 882 indicates a stopper that hits the hitting table. 8C indicates a swing claw, which is driven by a motor (not shown). 8D is a hitting table, 8E is an auger, 8F is a fan, 8G is a hanging rod, and 8H is a shielding plate, on which sand is spread to a thickness of 2 cm. 8! indicates the burner, 8J indicates the furnace body (cylindrical), and 8 indicates the flue. The raw flour that has been drained in the seventh step is put into a quantitative hopper and spread uniformly on the fence 8B1 to a thickness of lea. The dried powder is scraped out by an auger 8E. The room temperature during drying should be around 70℃, and the burner should be lit for 0.5 to 3 hours (while rotating the fan 8F), then turn off the burner, and the fan should be turned 8F for 1 to 12 hours, without lighting the burner. Alternatively, you can dry it naturally or by running the fan 8F for 48 hours or more. The dry powder obtained here has a moisture content of 18X or less (it may be passed through a steam pipe instead of the burner 8I and the flue 8). The dry powder thus obtained weighs approximately 2,000 to 3,000 kg per 30,000 kg of raw material.
It is g. Although some of this dry powder is mature, most of it is unmilled starch in the form of lumps with a diameter of 0.5 to 3 mm. [Method-2] The drying bag RL19 of another embodiment is shown in FIGS. 17, 18, and 19. 9A is a cage made by pasting paper on the bottom of a rectangular wooden frame. 9B shows the fence into which cage 9A is inserted, and 9C shows the steam piping. Spread the raw flour that has been drained in the seventh step to a thickness of about 2 cm and spread it evenly on 9A. Pass steam through the steam pipe 9C for 12 hours or more and dry the dry powder until the moisture content becomes 1 flk or less. Dry powder is about 2.000 to 3.0 per 30,000 kg of raw materials.
,000kg. Although some of this dry powder has matured parts, most of it is unpowdered starch in the form of lumps with a diameter of 0.5 to 3II1 m. The temperature in the steam pipe is 100°C or less. In addition, among the above-mentioned [Method-1] and [Method-2], in the mechanical semi-automatic fence drying method of [Method-1], it is easy to replace the raw powder and the dry powder. Ninth step: Packing into bags (known technique). In addition to the above, after the first to eighth steps described above, the following ninth and tenth steps can be performed. Ninth step: Mill the powder using a milling machine with a mesh size of 1110 to 200 (known technique). In general, this step may be omitted because the impurities are removed in the deep hole state in the seventh step. However, there may be cases where the starch is used in applications that must be completely free of dust, and in that case, the ninth step is performed on the starch provided. 1st O step Packing into bags (known technique). [Effects of the Invention] The starch obtained by the present invention can exhibit the following effects. 1) Large water retention capacity. Starch generally swells (expands) when hot water is poured into it, and
Over time, some will shrink. The viscosity characteristics can be seen using an amylograph (see Figure 20). 2) The large-particle starch obtained in the present invention has many particles with a specific gravity of 100 μ class (as can be seen even when viewed in a mirror). Large particles have the ability to absorb water and retain it. Since it is a starch with calcium binding, it has the property of being difficult to swell (double-stage swelling and deterioration). The fact that it is difficult to swell means that it is difficult to shrink, that is, it is difficult to release absorbed water. 3) When starch with the above characteristics is used in cooking, the following effects can be achieved. b) Dump can be made plump. Mouth) Ankake in Chinese food never becomes watery. c) Fried chicken in oil is fried crisply. 2) Hand-made noodles can be cut into thin pieces and have a firm texture. e) It has the flavor and sweetness of g1 flour.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the lees and deep hole device, Fig. 2 is a schematic vertical sectional view of the same as above, Fig. 3 is a plan view of the multi-stage sedimentation tank, Fig. 4 is a schematic longitudinal sectional view of the same as above, Fig. 5 is a plan view of the exposure tank, Fig. 6 is a schematic vertical sectional view of the same as above, Fig. 7 is a schematic longitudinal sectional view showing the operation, Fig. 8 is a plan view of the contaminant removal device, and Fig. 9 10 is a plan view showing another embodiment of the contaminant removal device, FIG. 11 is a schematic longitudinal sectional view of the same as the above, and 1211 is a contaminant removal device and other embodiments. FIG. 13 is a schematic vertical cross-sectional view of the same as above, FIG. 14 is a plan view of the drying device, FIG. 15 is a schematic vertical cross-sectional view of the same as above, and FIG. 16 is an A-A line. Fig. 17 is a plan view of a drying device of another embodiment, Fig. 18 is a front view, Fig. 19 is a longitudinal sectional view of a B-B line diagram, and Fig. 20 shows viscosity characteristics. Amylograph, Fig. 21 is a microscopic photograph of large particle starch obtained by the present invention, and Fig. 22 is a microscopic photograph of starch obtained by the conventional manufacturing method. 191. Separation device for lees and deep holes, 241. Multistage sedimentation tank, 310. exposed oak, 580. Contaminant removal device, 610. Contaminant removal device, 818. drying equipment. Fig. 8 Fig. 10 b Fig. 11 Fig. 18 Fig. 20 Fig. 21 Fig. 22 Hand-threading paper (Method) January 10, 1999 Patent Application No. 231185 2, filed in 1988 Name of the invention A method for producing large-particle starch, a multi-stage settling tank, an exposure tank, a device for removing impurities, and a drying device used in this manufacturing method Relationship with the case of the person making the amendment Name of the patent applicant Jinno Starch Factory Co., Ltd. 4. Agent postal code: 060 Address: Kita 1-jo Nishi 3-chome, Chuo-ku, Sapporo Telephone: (01)
1) 231-16111 5. Date of amendment order, contents of amendment (1) “Figure 21 is 61.
190. " is corrected to European language. ``Figure 21 is a microscopic photo of the particle structure of large-particle starch obtained by the present invention, and Fig. 22 is a microscopic photo of the particle structure of starch obtained by the conventional manufacturing method.'' Patent Application No. 231185, dated March 19, 1988 2 Name of the invention Method for producing large-particle starch, multi-stage sedimentation tank, rinsing tank, impurity removal device, and drying device used in this production method 3 Person making the correction Relationship to the case Patent applicant name Jinno Starch Factory Co., Ltd. 4 Agent Postal code 060 Address Kita 1-jo Nishi 3-3-3-6, Chuo-ku, Sapporo Column 7 for detailed explanation of the invention subject to the amendment Contents of the amendment (1) ) Specification page 5, line 3, page 6, line 7, page 6, line 12, page 6, line 1
Correct "Large starch" in line 4 to "Large starch". (2) Correct "Figure 23" on page 5, line 7 of the specification to "Figure 22." (3) "Pipe 2B1" in lines 3 to 4 on page 11 of the specification is corrected to "sedimentation tank 2A2." (4) Correct "4" in line 5 on page 16 of the specification to "2". (5) "Figure 14" on page 16, line 1o of the specification is corrected to "Figures 14 and 15." (6) Statement 2! Change “many” in line 3 of page to “many” (21st
(see figure). that's all

Claims (1)

[Claims] 1. A method for producing large particle starch, which is characterized by comprising the following first to eighth steps. Wash the potatoes, which are the raw materials for the first step. Second step: Grind the raw material. 3rd step The juice after grinding is separated into lees and stagnant milk. Fourth step Starch is poured into a multistage settling tank 2 to precipitate starch. 5th step Only the starch 13 with heavy specific gravity obtained in the settling tank of the multi-stage settling tank 2 is transferred to the bleaching tank 3, and an appropriate amount of calcium-containing or magnesium-containing fresh water is added thereto and stirred until dissolved. , wash with water (exposing). Step 6: Separate into No. 1 flour and No. 2 flour. Seventh Step In the sixth step, impurities (dust) separated from the sedimentation tank, dissolution tank, etc. are removed, and at the same time, water is dehydrated. Eighth step: The raw flour obtained in the seventh step is dried at low temperature for a long time. 2. The method for producing large particle starch according to claim 1, wherein after the first to eighth steps, milling is performed as a ninth step. 3. Connect an appropriate number of sedimentation tanks with a predetermined volume with pipes, and inject the starch 11 obtained in the previous step into the most advanced sedimentation tank, and the starch will flow into the adjacent sedimentation tank in an overflow state. A multi-stage sedimentation tank characterized by being configured as follows. 4. It is composed of a constant volume bleaching tank main body 3A, a shaft 3B rotatably arranged in the center of this bleaching tank main body, and a stirring rod 3C connected horizontally to the lower part of this shaft. A bleaching tank. 5. A stirring rod 5B is rotatably provided at the bottom of a container 5E with a predetermined capacity, a filter body 5A is provided below the container 5E, and a dehydrator 5D is connected to the filter body 5A via a gear pump 5C. A contaminant removal device characterized by being connected. 6. The fence type dryer main body 8B has a fence 8B1 made of iron plate below the quantitative hopper 8A with the conveyor 8A1
is arranged to be able to swing freely, and a bumping table 8D is arranged on the left side of this fence type dryer main body 8B.
An auger 8E is installed below the powder discharge port, a fan 8F is installed on the side of the fence type dryer body 8B, and a fan 8F is installed on the lower surface of the fence type dryer body 8B, which is connected to the furnace body 8J. A drying device characterized by being equipped with an 8K flue.