JP2008113655A - Working method and device of corn grain for preparing ethanol - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce sorting processes as many as possible, simplify construction, and enable an easy sorting of albumen, a peel and a germ. <P>SOLUTION: The working method has a conditioning process of adding a predetermined amount of water to the corn grains, a husking process of husking the grains without pulverizing the conditioned grains while keeping the shape, a cracking process of cracking the husked corn grains, a sorting process of sorting the albumen and the germ from the cracked product, and a pulverizing process of pulverizing the sorted albumen further. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for processing corn grains and the apparatus for producing ethanol.

  Conventionally, the processing method of the corn grain for manufacturing ethanol is well-known, For example, what was described in patent document 1 and what was described in patent document 2 are known.

  The invention described in Patent Document 1 is (1). Crushing corn grains with an impact mill; (2). The ground corn is divided into a first stream of straw and a second stream containing germ, groats (hereinafter used to mean corn endosperm) and residual bran. Step (3). A first refining step to purify the second stream of germ, endosperm and residual straw; (4). A first selection step of extracting germ and endosperm by selecting the embryo, endosperm and residual straw after the first purification step with a shifter; (5). A second purification step for purifying an intermediate product composed of germ, endosperm and residual soot not extracted in the first selection step; (6). And a second sorting step for extracting the germ and the endosperm by sorting the embryo, the endosperm and the residual straw after the second purification step with a shifter.

  In this way, the wet corn kernels are impact pulverized to keep the pulverized product as large as possible in average particle size, and the resulting pulverized germ is sorted by particle size and transferred to the ethanol extraction plant. In the previous step, at least 7%, preferably 10% pure germ is taken from the corn grain, and at least 1%, preferably 2.5% pure cocoon is taken from the corn grain. In other words, it is possible to improve the endosperm recovery from corn grains, reduce impurities and pasty products generated during ethanol production in the ethanol extraction plant, and improve the purity of ethanol than before. is there.

  However, in the above method, (1). In the process described in 1., one corn grain is crushed into a plurality of small pieces (pieces), so that germs and residual straw are mixed into the crushed endosperm, and only pure endosperm is supplied as a raw material. To sort out germs and residual cocoons from endosperm (2). To (6). Required multiple sorting steps as described in. When a plurality of sorting steps are provided in this way, the configuration becomes complicated, and there is a problem that the manufacturing cost of equipment costs is high and the running cost is high due to the cost of electricity consumed in the plurality of sorting steps.

  Moreover, the invention described in Patent Document 2 is (a). Tempering a certain amount of corn grains; and (b). Crushing corn grains, and (c). Threshing the crushed corn kernels; (d). A sorting step of separating the crushed corn grains into a first separated product having a large particle size and a second separated product having a small particle size; and (e). Separating the second separation into large grains and intermediate grains; (f). A specific gravity sorting step of sorting the large grains into a large endosperm and a mixture of large germ, pericarp and fine endosperm; (g). And a specific gravity sorting step for sorting the intermediate grain into intermediate endosperm and a mixture of intermediate embryo, pericarp and fine endosperm.

  (B) above. In the process described in (1), for example, one corn grain larger than the grain described in Patent Document 1 is crushed into 3 to 10 pieces. That is, the crushed material crushed into 3 to 10 pieces is wind-selected, and first, the large peel is removed, and then the above (c). In the process described in 1., since the remaining pericarp, germ, and cocoon are separated, the recovery rate of endosperm containing starch at a high concentration can be greatly improved. Thereby, there exists an advantage that the yield of the product in ethanol production or dry milling improves.

  However, by simply crushing one corn grain into 3 to 10 pieces, it is a state in which the skin still remains on the pieces, and the subsequent step (c). It was necessary to separate the pericarp, germ, and cocoon by continuously providing the steps described in. Furthermore, for sorting pericarp, germ and residual wrinkles from endosperm (d). To (g). A plurality of sorting steps described in (1) are required.

The above (b). As described, when crushing without removing the skin, peeled skin is often attached to the endosperm and germ, and this skin has an adverse effect on the vibration and wind of the specific gravity sorter, and the endosperm Separation from the germ was difficult. Accordingly, a plurality of specific gravity sorters are required to accurately separate endosperm and germ.
US Patent Application Publication No. 2006/0035354 International Publication No. 2006/081673 Pamphlet

  In view of the above problems, the present invention simplifies the configuration by reducing the selection process as much as possible, and makes it possible to easily separate endosperm, pericarp, and germ, and processing of corn grains for producing ethanol. It is a technical problem to provide a method and an apparatus thereof.

In order to solve the above-mentioned problems, the present invention is a method for processing corn grains for the production of ethanol, wherein the corn grains are conditioned by performing a predetermined amount of water so that only the corn pericarp is moistened. A mashing process, a moulting process for removing the moistened skin and moulting so that the corn grains are not crushed while maintaining their shape, a smashing process for breaking the shed maize grains into crushed grains, and a corn A technical means was provided, which includes a separation step of separating endosperm and germ from the crushed grains, and a pulverization step of pulverizing the separated endosperm to obtain corn flour.

It is preferable to use a beater-type impact-type molting machine or a friction-type molting machine for the molting process, and it is preferable to use an impact-type crusher for the crushing process.

In the separation step, a specific gravity sorter or an optical sorter is preferably used.

A primary purification process using an aspirator and a shifter is preferably provided between the molting process and the crushing process, and an aspirator and a shifter are provided between the crushing process and the specific gravity sorting process. It is preferable to provide the used secondary purification step.

Furthermore, it is good to provide the hydration process which hydrates the corn grain which peeled and tempered between the said primary purification process and the said cracking process.

Further, between the primary purification step and the cracking step, the corn grains peeled off are put into a pressurized tank to allow carbon dioxide to penetrate, and then the corn grains taken out from the pressurized tank are heated for a short time. A carbon dioxide treatment step for treatment may be provided.

  The corn grain processing apparatus according to the present invention includes a tempering apparatus for tempering the corn grain by adding a predetermined amount of water so that only the corn kernels are moistened, and the corn grain maintains its shape and is not crushed. As described above, a dehulling device that removes moistened peel and molts, a crushing device that crushes the shed corn grains, a specific gravity sorting device that separates endosperm and germ from the cleaved cracked product, A crushing device for crushing the separated endosperm. The molting device can be rotated into the perforated wall cylinder, the grain supply cylinder provided at one end of the perforated wall cylinder, the grain discharge cylinder provided at the other end of the perforated wall cylinder, and the perforated wall cylinder. And a peeling trochanter fixed to the rotating shaft. The molting device may further include a grain transfer screw fixed to the rotating shaft in the vicinity of the grain supply cylinder at one end of the porous wall cylinder.

The peeling trochanter of the peeling machine has a base portion pivotally attached to the rotation shaft, and a plurality of arm portions extending radially from the base portion to the porous wall tube, and a plurality of support members provided in the axial direction of the rotation shaft; And an elongated beater plate that is attached to the tip of each arm portion of the plurality of support members and is parallel to the rotation axis.

  According to the first aspect of the present invention, the pre-selected corn grains are tempered in the tempering process, and then supplied to the molting process, and the corn grains are maintained in the molting process without being crushed. While being molted. At this time, about 98% of the pericarp is peeled off and removed, and there is almost no possibility that pericarp is mixed into the endosperm as compared with the case where the corn grains are crushed after the conventional tempering step. The corn grain after molting is in a state where the germ is attached to the endosperm, and this grain is supplied to the next crushing step. In the crushing step, the endosperm is divided into a plurality of pieces, for example, 4 to 8 pieces, and the attached germ is separated. At this time, since the germ is elastic, the germ itself is not broken into small pieces and is easily separated from the endosperm. Breaking the corn grains without destroying the germ is advantageous in that it can be recovered while retaining the original shape of the germ, improving the efficiency of selection in the subsequent process, and preventing the death of the enzymes contained in the germ. Further, it is possible to prevent germ oxidation and spoilage and provide a high added value germ without destroying useful components.

Next, the mixture of the divided endosperm and germ is supplied to a specific gravity selection process, separated into endosperm and germ due to a specific gravity difference, and the separated endosperm is further pulverized and recovered in a grinding process. Become. In other words, according to the present invention, there is almost no possibility that the pericarp is mixed into the endosperm, so that the specific gravity selection step is only one step, the configuration is simplified by reducing the selection step as much as possible, and the endosperm, pericarp, embryo Can be easily separated.

  FIG. 1 is a flowchart of a method for processing corn grains for producing ethanol according to the present invention.

In FIG. 1, corn grains as a raw material are first supplied to a selection process to separate and remove foreign substances and foreign matters. For example, a sorting machine called a milling separator 1 is a two-stage sieve including an upper sieve made of a perforated iron plate having a diameter of about 15 mm and a lower sieve made of a perforated iron plate having a diameter of about 4 mm. In this two-stage sieve, corn grains pass through the sieve mesh in the upper stage sieve, but large impurities are separated from the raw material over the sieve, and smaller impurities than corn grains pass through the sieve mesh in the lower stage sieve. However, since the corn grains are over, it is possible to separate and remove small impurities and large impurities. Next, the corn grains are supplied to a stone punching machine 2 to separate and remove stones and dust. This stone remover can use a dry destoner or the like that separates stones and the like from corn grains using the specific gravity difference. The corn grains selected as described above are then supplied to the hydration and tempering step 3. The hydration / tempering step 3 is a hydration / tempering step for moisture adjustment provided to improve the quality of the product powder. The corn grains having a moisture content of about 12% are hydrated to a moisture content of 15-16%. The tempering is carried out for about 4 to 12 hours after addition.

Reference numeral 4 is a tempering process for a short period of time to make it easy to peel off the corn kernels. The corn grain tempered in the hydration / tempering process of reference numeral 3 has a moisture content of 1 to 6% by weight. With water addition, refining is performed for 5 to 30 minutes. As a result, water does not penetrate into the corn endosperm tissue, but only water is added to the pericarp, so that the pericarp and endosperm are easily separated.

Reference numeral 5 denotes a molting process which is a main part of the present invention, and the corn grain tempered in the tempering process of reference numeral 4 is exfoliated only while maintaining its shape without being crushed. Is. At this time, about 98% of the pericarp is peeled off and removed, and the corn grains from which the pericarp has been removed are discharged from the molting process with the germ attached to the endosperm.

In the molting process 5, the pericarp and small corn crushed particles that pass through the mesh of the molting machine are passed through and supplied to the braun finisher 6 in the next process, and the corn grains in a state where the germ is attached to the endosperm that does not pass through the mesh of the molting machine Then, it is supplied to the aspirator 7 in the next process.

In the finisher 6, the endosperm adhering to the inside of the pericarp is peeled off, separated from the pericarp and the product powder is taken out. In the aspirator 7, the skin and fine powder are sorted and removed from the corn grains after the molting by a suction-type air stream, and purification is performed. The purified corn grains are supplied to the shifter 8 in the next step, and the corn grains that have been shed are separated into three types of particle sizes: sized granules, medium crushed grains, and small crushed grains.

Since the sized particles separated by the shifter 8 are in a state where the germ is attached to the endosperm, the corn kernel is broken into 4 to 8 pieces, and then supplied to the breaking step 10 to separate the endosperm and the germ. Is done. The medium crushed particles separated by the shifter 8 are supplied to the sorting step 13 for sorting into endosperm and germ.

In the sorting step 13, it is possible to use a specific gravity sorter that inclines and vibrates the perforated iron plate, and blows wind from below to lift a light specific gravity. In addition, the color and shape of the target object are identified by an optical method from the continuous flow of the particulate matter, and the target object to be separated is blown off from the continuous flow by an ejector such as a blast to select endosperm and germ. An optical sorter can be used.

Further, the small crushed particles separated by the shifter 8 are supplied to the pulverizing step 14 to obtain product powder.

In order to give elasticity to the embryo adhering to the endosperm, it is preferable to provide a hydration / tempering step 9 in the previous step of the crushing step 10. In this hydration / tempering step 9, It is advisable to add water of 2% or less and temper within 30 minutes. As a result, the elasticity of the germ is increased, and the germ itself becomes difficult to be finely crushed in the crushing step 10, so that the endosperm and the germ can be easily separated. As an alternative to the hydration / tempering step 9, the peeled corn grains are put into a pressurized tank to infiltrate carbon dioxide, and then the corn grains taken out from the pressurized tank are heated for a short time. A processing step may be provided.

Referring to the carbon dioxide treatment step, carbon dioxide is an adsorptive gas, and it is considered that the carbon dioxide treatment process facilitates sorption by lipids and proteins contained in a large amount in endosperm and germ. Therefore, when corn grains are put into a pressurized tank or the like and carbon dioxide is supplied under pressure, it is considered that cell binding of endosperm and germ is relaxed or broken, and as a result, when corn grains are returned to atmospheric pressure, It is very easy to germinate corn grains that have weakened cell binding.

As the crusher used in the crushing step 10, a pin mill or an impact mill that is crushed by receiving an impact / friction action between a rotating pin and a fixed pin can be used. , And the endosperm is broken into a plurality of pieces, for example, 4 to 8 pieces.

Next, corn grains made of a mixture of germ and endosperm broken into 4 to 8 pieces are supplied to the aspirator 11, where the pericarp and fine powder are selected and removed by a suction-type air stream for purification. Furthermore, the purified corn grains are supplied to the shifter 12 and separated into three types of small crushed grains, large and medium crushed grains, and product powder. The large and medium crushed particles over the shifter 12 are supplied to the specific gravity sorting step 13 together with the medium crushed particles discharged from the shifter 8, the endosperm and the germ are subjected to specific gravity sorting, and the small crushed particles passing through the shifter 12 are subjected to the specific gravity sorting step. 13 is supplied to the pulverizing step 14 together with the small crushed particles discharged from the shifter 8 without going through 13, and is pulverized to obtain product powder.

The pulverizer used in the pulverization step 14 is preferably a roller mill, and the pulverized product pulverized in the pulverization step 14 is supplied to the shifter 15 in the next step, and is divided into three categories: small division, large division, and product powder (small division). Separated into types. The large section over the shifter 15 is supplied to the aspirator 16 and sorted into pericarp and germ by a suction type airflow, and the middle section through the shifter 15 is supplied to the aspirator 17 and the perspiration and small parts are supplied by the suction type airflow. Separated and sorted into crushed grains. Then, the small pulverized particles separated by the aspirator 17 are returned again to the pulverization step 14, and the pulverization / selection operation is repeated. The small section that has passed through the shifter 15, that is, the endosperm powder, is taken out as product powder.

As described above, the corn grains after the tempering are exfoliated while maintaining the shape of the corn grains without being crushed in the dehulling step 5, so that about 98% of the peels are peeled off and removed. That is, compared with the case where the corn grain is crushed after the conventional tempering step, there is almost no possibility that the pericarp is mixed into the endosperm. Then, the corn grains after molting are in a state where germs are attached to the endosperm, and the grains are supplied to the next crushing step 10. In the breaking process 10, the endosperm is broken into 4 to 8 pieces, and the attached germ is separated. At this time, since the germ is elastic, the germ itself is separated from the endosperm without being broken into small pieces. Subsequently, the mixture of endosperm and embryo broken into 4 to 8 pieces is supplied to the specific gravity sorting step 13 and separated into endosperm and germ due to the specific gravity difference. It will be crushed and collected. That is, according to the present invention, there is almost no possibility that the pericarp is mixed into the endosperm, so that the specific gravity selection step 13 is only one step, the selection step is reduced as much as possible to simplify the configuration, and the endosperm, pericarp, The germ can be easily separated.

Hereinafter, the peeling machine used in the peeling process of the present invention will be described. FIG. 2 is a schematic longitudinal sectional view of a beater-type impact-type molting machine, and FIG. 3 is a sectional view taken along line a-a 'of FIG.

2 and 3, the impact-type molting machine 20 includes a porous wall cylinder 23 provided horizontally in a machine frame 22 provided on a machine base 21, and a grain supply cylinder provided on one end side of the porous wall cylinder 23. 24, a grain discharge cylinder 25 provided on the other end side of the porous wall cylinder 23, a rotary shaft 26 rotatably disposed in the porous wall cylinder 23, and the grain supply cylinder 25 of the rotary shaft 26 in the vicinity. The main part is constituted by the fixed grain transfer screw 27 and the peeling trochanter 28 provided in the porous wall cylinder 23.

In the impact type molting machine 20 shown in FIG. 2, a screw 27 for transferring the grain is provided on the rotary shaft 26, but when the long peeling trochanter 28 shown in FIG. The screw 27 can be omitted.

Reference numeral 29 denotes a skin recovery hopper provided below the perforated wall cylinder 23, and has a skin discharge port 30 at the lower end of the skin recovery hopper 29. Reference numerals 31 and 32 are bearings provided outside the machine casing 22 and support the rotary shaft 26 in a rotatable manner. A V pulley 33 is fixed to one end of the rotating shaft 26, and is driven to rotate by a motor 36 provided at the lower part of the machine base 21 via a V belt 34 and a motor pulley 35. The rotating shaft 26 is set to rotate at a rotational speed of 800 to 1000 rpm.

The peeling trochanter 28 has a base member 37a fixed to the rotary shaft 26, and a support member 37 (four arms in FIG. 3) provided with a plurality of arm portions 37b extending radially from the base portion 37a to the porous wall tube 23. (Provided with three support members 37 in FIG. 2) and a plurality of arm portions 37b corresponding to the plurality of support members 37 at the front ends. A long beater plate 38 parallel to the rotation shaft 26 is attached.

The long beater plates 38 are provided with four beater plates 38 in the embodiment shown in FIGS. 2 and 3, and eight beater plates 38 in the embodiment shown in FIG. ing.

In the impact type molting machine 20 of the present embodiment, when the corn grain after tempering is supplied from the grain supply cylinder 24, it is transferred into the porous wall cylinder 23 by the screw 27, and in the porous wall cylinder 23 corn The degree of fullness of the grains is about 20 to 40%, and the corn is caused by the impact of hitting by the beater plate 38 rotated in this state, the impact of collision of the corn grains, and the friction pressed against the inner wall of the porous wall cylinder 23. The pericarp on the grain surface will be peeled off. At this time, since the corn grains are peeled off by rotation of the long beater plate 38 ..., the corn grains are peeled off while maintaining their shape without being crushed, so that about 98% of the peels are peeled off and removed. It will be. Then, the corn grains are gradually transferred to the grain discharge cylinder 25 side and finally discharged from the grain discharge cylinder 25 to the outside of the machine.

The peel and pulverized fine powder generated at this time are discharged out of the porous wall cylinder 23 and discharged outside the machine through the peel recovery hopper 29 and the peel outlet 30.

In addition, in the impact type molting machine 20 of this embodiment, although a damming plate, an opening / closing lid, etc. are not provided in the discharge side of the porous wall cylinder 23 or the opening edge of the grain discharge cylinder 25, a fullness is 20- If it is less than 40%, it may be installed as appropriate. Further, the degree of fullness in the porous wall tube 23 may be adjusted by adjusting the number of rotations of the rotating shaft 26 or adjusting the supply amount of corn grains.

Instead of the beater-type impact-type molting machine, a friction-type molting machine as shown in FIG. 5 may be used in the molting process. The friction-type peeling machine uses a friction-type rice milling machine in which a ventilation friction polishing trochanter is rotatably provided in a perforated wall polishing cylinder.

In FIG. 5, the friction-type molting machine 40 includes a porous wall cylinder 43 provided horizontally in a machine frame 42 provided on a machine base 41, and a supply port 44 a and a shutter 44 b provided on one end side of the porous wall cylinder 43. A grain supply tank 44, a grain discharge port 42 a provided on the other end side of the porous wall cylinder 43, a hollow rotary shaft 45 disposed rotatably in the porous wall cylinder 43, and a grain of the hollow rotary shaft 45 A grain transfer screw 46 fixed below the supply port 44 a of the supply tank 44 and a friction trochanter 47 provided in the porous wall cylinder 43 are provided.

The skin recovery hopper 51 is provided below the porous wall cylinder 43. A skin discharge tube 52 is provided at the lower end of the skin recovery hopper 51. A pulley 53 is fixed to one end of the hollow rotary shaft 45 and is driven to rotate by a motor (not shown) provided in the lower part of the machine base 41. In order to adjust the degree of filling of the corn grains in the porous wall cylinder 43, a resistance lid 49 is provided at the grain outlet 42a. The other end of the hollow rotary shaft 45 is connected to the air supply source 50, and the air passes through the air holes 45 a formed in the hollow rotary shaft 45 and the air blowing port 47 a provided in the friction trochanter 47, so that the air can It is supplied to the peeling chamber 48 between the cylinders 43.

In the friction type molting machine 40, when the corn grains after tempering are supplied from the supply port 44a of the raw material supply tank 44, they are transferred into the perforated wall cylinder 43 by the screw 47 and rotated in this state. Due to the friction between the corn grains and the friction pressed against the inner wall of the porous wall cylinder 43, the peel on the surface of the corn grains is peeled off. At this time, the corn grains are shed without being crushed while maintaining their shape. And the corn grain is gradually transferred to the grain outlet 42a side, and finally discharged from the grain outlet 42a to the outside of the machine.

The peel and pulverized fine powder generated at this time are discharged out of the perforated wall cylinder 43, and are discharged outside the apparatus through the peel recovery hopper 51 and the peel discharge cylinder 52 by the suction of the fan 54. The air supplied into the peeling chamber 48 from the blowing port 47a promotes the discharge of the pericarp and pulverized fine powder to the outside of the porous wall cylinder 43.

It is a flowchart of the processing method of the corn grain for manufacturing ethanol which concerns on this invention. It is a schematic longitudinal cross-sectional view of a beater type impact-type molting machine. FIG. 3 is a cross-sectional view taken along line a-a ′ of FIG. 2. It is a perspective view which shows a elongate peeling trochanter. It is a schematic longitudinal cross-sectional view of a friction type peeling machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Milling separator 2 Stone remover 3 Hydrolysis / tempering process 4 Tempering process 5 Dehulling process 6 Bran finisher 7 Aspirator 8 Shifter 9 Hydrolysis / tempering process 10 Splitting process 11 Aspirator 12 Shifter 13 Specific gravity sorting process 14 Grinding process 15 Shifter 16 Aspirator 17 Aspirator 20 Impact type molting machine 21 Machine base 22 Machine frame 23 Perforated wall cylinder 24 Grain supply cylinder 25 Grain discharge cylinder 26 Rotating shaft 27 Screw 28 Peeling trochanter 29 Skin recovery hopper 30 Skin discharge 31 Bearing 32 Bearing 33 Bearing V 34 V belt 35 Motor pulley 36 Motor 37 Support member 37a Base portion 37b Arm portion 38 Beater plate 40 Friction-type molting machine 41 Machine base 42 Machine frame 43 Perforated wall cylinder 44 Grain supply tank 45 Hollow rotating shaft 46 Screw 47 Friction trochanter 48 Peeling Chamber 49 Resistance lid 50 Air supply source 51 Skin recovery hopper 52 Skin discharge cylinder 53 Pulley 54 Fan

Claims (12)

A method for processing corn grains for the production of ethanol,
A tempering step in which corn grains are tempered by adding a predetermined amount of water so that only the corn peel is moistened;
A molting process to remove and moisten the moistened skin so that the corn grains maintain their shape and are not crushed;
A crushing step of cleaving the shed corn grains into crushed grains;
A separation step of separating endosperm and germ from crushed corn grains;
A corn grain processing method for ethanol production, comprising: a pulverization step of pulverizing the separated endosperm to obtain corn grain powder. The method according to claim 1, wherein a beater-type impact peeling machine is used in the peeling process. The method according to claim 1, wherein a frictional peeling machine is used for the peeling process. The method according to claim 1 or 2, wherein an impact pulverizer is used in the crushing step. The method according to claim 1, wherein a specific gravity sorter is used in the separation step.   The method according to any one of claims 1 to 4, wherein an optical sorter is used in the separation step. The method according to claim 1, further comprising a primary purification step using an aspirator and a shifter between the molting step and the crushing step. The method according to claim 7, further comprising a secondary purification step using an aspirator and a shifter between the crushing step and the specific gravity sorting step. The method according to claim 7, further comprising a hydration step of tempering the corn grains that have been dehulled between the primary purification step and the crushing step. Between the primary purification step and the cracking step, the peeled corn grains are put into a pressurized tank to infiltrate carbon dioxide, and then the corn grains taken out from the pressurized tank are heat-treated for a short time. The method according to claim 7, further comprising a carbon dioxide treatment step. A corn grain processing device for producing ethanol,
A refining device for refining the corn grains by performing a predetermined amount of water so that only the corn peels are moistened;
A molting device that removes the moistened skin and molts so that the corn grains maintain their shape and are not crushed;
A crushing device for crushing the peeled corn grains,
A sorting device for separating endosperm and germ from the cracked cracked material,
A crushing device for crushing the separated endosperm,
The molting device includes a horizontally installed perforated wall cylinder, a grain supply cylinder provided at one end of the perforated wall cylinder, a grain discharge cylinder provided at the other end of the perforated wall cylinder, and the inside of the perforated wall cylinder A processing apparatus for corn grains for producing ethanol, comprising: a rotating shaft rotatably disposed on the rotating shaft; and a peeling trochanter fixed to the rotating shaft.   The peeling trochanter of the peeling machine has a base portion pivotally attached to the rotating shaft and a plurality of arm portions extending radially from the base portion to the porous wall tube, and a plurality of peeling trochanters are provided in the axial direction of the rotating shaft. The processing apparatus according to claim 11, further comprising: a support member; and a long beater plate parallel to the rotation shaft attached to the tip of each arm portion of the plurality of support members.

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