CN211035775U - Corn fiber treatment system and corn wet-milling starch processing system applying same - Google Patents
Corn fiber treatment system and corn wet-milling starch processing system applying same Download PDFInfo
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- CN211035775U CN211035775U CN201921877922.5U CN201921877922U CN211035775U CN 211035775 U CN211035775 U CN 211035775U CN 201921877922 U CN201921877922 U CN 201921877922U CN 211035775 U CN211035775 U CN 211035775U
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Abstract
The utility model provides a corn fiber processing system and use its maize wet milling starch processing system, corn fiber processing system includes: the system comprises a pressure curve screen group, a fiber washing tank group, an enzyme preparation adding device and an external enzyme reaction tank, wherein the external enzyme reaction tank is used for receiving oversize products from a middle-stage pressure curve screen and providing an enzyme reaction site, and the reaction time of enzyme participation is prolonged. The external enzyme reaction tank can also be provided with a water injection inlet for adjusting the concentration of the dry fiber in the external enzyme reaction tank.
Description
Technical Field
The utility model relates to a maize deep-processing technical field especially relates to the fibre processing apparatus who increases enzyme reaction time when the washing of corn fiber, relates to a corn fiber processing system and use its maize wet-milling starch processing system particularly.
Background
The corn starch is a product prepared by taking corn kernels as raw materials and soaking the corn kernels in sulfurous acid, crushing and screening the corn kernels, separating and washing the corn kernels, dehydrating and drying the corn kernels. Corn starch wet milling (i.e., wet corn starch production) is currently used in corn starch further processing, and the aim of corn starch production is to extract as much pure starch and various byproducts (e.g., germ, protein, fiber, and other soluble materials) from corn kernels as possible. As shown in FIG. 1, the main processes for producing corn starch by wet milling of corn starch include: soaking the corns; crushing corns and separating and washing germs; fine grinding; washing and drying the fiber; separating gluten; separating and drying the protein; washing, dehydrating and drying the starch and the like.
In order to release more free starch, combined starch and corn protein from the corn fiber-containing pulp in the fiber washing process, an enzyme preparation needs to be added into the fiber washing tank, so that the enzyme preparation and the corn fiber-containing pulp are subjected to an enzyme reaction. However, since the dry fiber concentration of the fiber slurry in the fiber washing tank is low, the action efficiency of the enzyme preparation is low, and the retention time of the fiber slurry in the fiber washing tank is short, the reaction time of the enzyme is short, the reaction is insufficient, and the action efficiency of the enzyme preparation is further reduced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a corn fiber processing system and use its maize wet milling starch processing system, it includes: the system comprises a pressure curved sieve set, a fiber washing tank set, an enzyme preparation adding device and an external enzyme reaction tank, wherein the pressure curved sieve set is provided with a plurality of stages of pressure curved sieves, the pressure curved sieves are used for separating fiber pulp containing starch and protein into oversize products and undersize products, and each stage of the pressure curved sieves is provided with a fiber pulp inlet, an oversize product outlet and an undersize product outlet; the fiber washing tank group is used for providing a place for washing the fiber pulp by washing water, the fiber washing tank group is provided with a plurality of stages of fiber washing tanks, and each stage of fiber washing tank is provided with an oversize material inlet, an undersize material inlet and a discharge hole; the enzyme preparation adding device is used for adding the enzyme preparation to the corn fiber treatment system; the external enzyme reaction tank is connected with an oversize outlet of the middle-stage pressure curved sieve, and is used for receiving the oversize in the middle-stage pressure curved sieve and providing an enzyme reaction site, and returning the oversize to a fiber slurry inlet of the next-stage pressure curved sieve behind the middle-stage pressure curved sieve through a material return pipe after a preset time.
Preferably, the external enzyme reaction tank is provided with a water injection inlet for adjusting the concentration of the dry fiber in the external enzyme reaction tank.
Further, the water injection inlet is externally connected with a water injection pipeline for adjusting the concentration of the dry fiber in the externally connected enzyme reaction tank.
Preferably, the corn fiber treatment system further comprises: and the first flow control device is arranged at the water injection inlet and is used for controlling the water injection amount received by the externally-connected enzyme reaction tank.
Further, the utility model discloses corn fiber processing system still includes according to the washing water yield that the corresponding reduction of water injection volume pours into to corn fiber processing system to the washing water that keeps corn fiber processing system's total water yield unchangeable pours into adjusting device into.
Preferably, the corn fiber processing system of the present invention further comprises: and the second flow control device is arranged at a washing water inlet of the corn fiber treatment system and used for controlling the water inflow of the external washing water of the corn fiber treatment system.
Further, the enzyme preparation adding device is an enzyme preparation adding pipeline.
Preferably, the external enzyme reaction tank is a horizontal enzyme reaction tank, the horizontal enzyme reaction tank is provided with a plurality of first chambers which are horizontally arranged and first stirring devices corresponding to the first chambers, and the fiber slurry can sequentially circulate among the first chambers.
Preferably, the horizontal enzyme reaction tank is provided with a plurality of semi-closed partition plates which are alternately arranged up and down, and the semi-closed partition plates are used for dividing the horizontal enzyme reaction tank into a plurality of first chambers.
Further, the external enzyme reaction tank is a plurality of continuous reaction tanks which are connected in series, and a second stirring device is arranged in the continuous reaction tank.
Preferably, the external enzyme reaction tank is a vertical enzyme reaction tank, the vertical enzyme reaction tank is provided with a plurality of second chambers which are vertically arranged and a third stirring device corresponding to the second chambers, and the fiber slurry can sequentially circulate between the second chambers.
The utility model discloses a particular embodiment still provides a maize wet milling starch processing system, maize wet milling starch processing system contains the corn fiber processing system among the above-mentioned particular embodiment.
Preferably, the corn wet milling starch processing system further comprises a corn disruption system, a germ separation and washing system, a fine milling system, a fiber treatment system, a fiber dewatering and drying system, a gluten separation system, a protein separation and drying system, and a starch washing, dewatering and drying system.
According to the above-mentioned embodiment of the present invention, the corn fiber processing system and the corn wet milling starch processing system using the same have at least the following beneficial effects: the oversize material (oversize fiber) of the middle-stage pressure curved sieve is directly conveyed to the external enzyme reaction tank, the dry fiber content concentration of the oversize material of the pressure curved sieve is higher, and when the dry fiber content concentration of the oversize material of the pressure curved sieve is higher, water can be injected into the external enzyme reaction tank to control the dry fiber content concentration in the external enzyme reaction tank, so that the enzyme preparation has better reaction performance, the yield of corn starch and/or corn protein is improved, and the economic benefit is further improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification of the invention, illustrate exemplary embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart of a corn starch wet milling process and a process water circulation chart in the prior art.
Fig. 2 is a schematic structural diagram of a corn fiber processing system for extracting corn starch according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a corn fiber processing system for extracting corn starch according to an embodiment of the present invention.
FIG. 4 is a graph showing the relationship between the dry matter concentration of the fiber and the relative yield of starch and protein on the fiber according to the embodiment of the present invention.
FIG. 5 is a schematic structural view of an external enzyme reaction tank according to an embodiment of the present invention.
FIG. 6 is a schematic structural view of an external enzyme reaction tank according to an embodiment of the present invention.
FIG. 7 is a schematic structural view of an external enzyme reaction tank according to an embodiment of the present invention.
FIG. 8 is a schematic structural view of an external enzyme reaction tank according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a corn wet milling starch processing system according to an embodiment of the present invention.
Description of reference numerals:
1 pressure curved sieve group 2 fibre washing tank group
3 enzyme preparation adding device 4 external enzyme reaction tank
5 first flow control device 6 second flow control device
7 washing water inlet P pump
11 pressure curved screen 111 fiber pulp inlet
112 oversize outlet 113 undersize outlet
21 fiber washing tank 211 oversize material feed inlet
212 undersize feed inlet 213 discharge outlet
11' middle stage pressure curved screen 41 return pipe
42 water injection inlet 43 water injection pipeline
44 first chamber 45 first stirring device
46 semi-enclosed partition 46 first compartment
47 second stirring device 48 second chamber
49 third stirring device 49B baffle
100 corn disruption system 200 germ separation and washing system
300 fine grinding system 400 fiber treatment system
500 fiber dewatering and drying system 600 gluten separation and drying system
700 separation of protein and drying system 800 washing, dehydration and drying system of starch
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the spirit of the present invention will be described in detail with reference to the accompanying drawings, and any person skilled in the art can change or modify the techniques taught by the present invention without departing from the spirit and scope of the present invention after understanding the embodiments of the present invention.
The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.
As used herein, the terms "first," "second," …, etc. do not denote any order or sequential importance, nor are they used to limit the invention, but rather are used to distinguish one element from another or from another element or operation described in the same technical language.
With respect to directional terminology used herein, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the present teachings.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
As used herein, "and/or" includes any and all combinations of the described items.
References to "plurality" herein include "two" and "more than two"; reference to "multiple sets" herein includes "two sets" and "more than two sets".
As used herein, the terms "substantially", "about" and the like are used to modify any slight variation in quantity or error that does not alter the nature of the variation. Generally, the range of slight variations or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the aforementioned values can be adjusted according to actual needs, and are not limited thereto.
In order to release more free starch, combined starch and zein from the corn fiber-containing slurry in the fiber washing process, an enzyme preparation needs to be added into a fiber treatment system, the enzyme preparation can reduce the hydrophilicity of cellulose and hemicellulose, the water content of fiber substances can be reduced, the concentration and drying efficiency is improved, the steam quantity for concentration and drying is reduced, and the energy consumption is further saved. In the prior art, enzyme preparations are enzymatically reacted with fibre pulp in a fibre wash tank. However, since the dry fiber concentration of the fiber slurry in the fiber washing tank is low, the action efficiency of the enzyme preparation is low, and the retention time of the fiber slurry in the fiber washing tank is short, the reaction time of the enzyme preparation is short, the reaction is insufficient, and the action efficiency of the enzyme preparation is further reduced.
The utility model discloses a curved sieve of intermediate level pressure specifically indicates that the curved sieve of pressure that is not located both sides is curved in the curved sieve group of pressure, removes the curved sieve of pressure on the leftmost side promptly and the curved sieve of arbitrary pressure outside the curved sieve of pressure on the rightmost side. The oversize outlet of the middle-stage pressure curved sieve is connected with an external enzyme reaction tank, the oversize outlet of the middle-stage pressure curved sieve can be not communicated with the oversize feed inlet of the corresponding fiber washing tank any more, a valve can be added on a pipeline between the oversize outlet of the middle-stage pressure curved sieve and the oversize feed inlet of the corresponding fiber washing tank, and the communication between the oversize outlet of the middle-stage pressure curved sieve and the oversize feed inlet of the corresponding fiber washing tank is cut off by the valve.
The utility model discloses an in the embodiment, can convey the oversize thing in the curved sieve of intermediate level pressure outside the corn fiber processing system and carry out the enzyme reaction, can return the oversize thing to the fibrous thick liquids entry of the curved sieve of next stage pressure after the curved sieve of intermediate level pressure through the feed back pipe after predetermined time, the oversize thing returns again in the corn fiber processing system. The reaction time of the enzyme preparation can be prolonged, the enzyme preparation can fully react, and the action efficiency of the enzyme preparation is improved.
In a preferred embodiment of the utility model, the oversize material outlet of the middle-stage pressure curved sieve is connected with the external enzyme reaction tank, the oversize material in the middle-stage pressure curved sieve is conveyed to the external enzyme reaction tank outside the corn fiber treatment system for enzyme reaction, and the relative yield of starch and protein is high without considering the performance of the continuous operation of the material in the system.
In a preferred embodiment of the present invention, the dry fiber concentration of the oversize material of the intermediate pressure curved screen is relatively high, for example, about 7% to 8%. Under the condition of considering the continuous operation performance of materials in the system, washing water can directly flow into an external enzyme reaction tank, the concentration of dry fiber of oversize products is easily adjusted to 4-6%, an enzyme preparation is in a better reaction environment, and the reaction efficiency of the enzyme preparation and the fluidity of the materials are considered.
In addition, the pressure curved sieve group is usually positioned at a very high position, usually 6-8 m away from the ground, and oversize products of the middle-stage pressure curved sieve automatically flow into an external enzyme reaction tank under the action of gravity without an external pump. The external enzyme reaction tank receives oversize products of the middle-stage pressure curved sieve, the oversize products stay in the external enzyme reaction tank for a preset time (for example, the contact reaction time of most of the oversize products in the external enzyme reaction tank is distributed from 90 minutes to 240 minutes, and the average contact reaction time is 150 minutes), during the time that the oversize products stay in the external enzyme reaction tank, enzyme preparation continues to perform enzyme reaction with the oversize products in the external enzyme reaction tank, after the preset time, the external enzyme reaction tank returns oversize materials to a fiber slurry inlet of a next-stage pressure curved sieve behind the middle-stage pressure curved sieve, so that the reaction time of enzyme preparation participation can be effectively prolonged, the enzyme preparation fully participates in the reaction, the hydrophilicity of cellulose and hemicellulose is reduced to the maximum extent, the yield of starch is improved, the reaction efficiency of the enzyme preparation is improved, and the sewage generated in the corn starch production by a wet milling method is reduced.
In addition, in the existing corn wet-milling fiber washing process, the oversize fibers (oversize products) from the corresponding stage pressure curved sieve and undersize wash water (undersize products) from the latter stage pressure curved sieve are merged in a fiber washing tank, and the dry fiber concentration of the fiber pulp in the fiber washing tank cannot be freely adjusted. The dry fiber concentration can affect the performance of the enzyme preparation, the lower dry fiber concentration can lead to the lower performance of the enzyme preparation, and the higher dry fiber concentration can lead to the increase of the viscosity, which is not beneficial to the continuous operation of the materials (particularly oversize materials or oversize fibers) in the system.
In a preferred embodiment of the present invention, taking the current factory process as an example, the dry matter content of the fiber on the screen of the previous stage pressure curved screen is about 7% -8%, and the flow rate is 40m3If the external enzyme reaction tank is filled with 30m3H washing water, reverse to the external enzymeThe concentration of the dry fiber in the external enzyme reaction tank can be adjusted to 5.24-6% by diluting the oversize product in the tank, so that the enzyme preparation has better reaction performance.
The enzyme reaction time can be calculated by dividing the effective volume of the external enzyme reaction tank by the total flow of the dilution oversize products (the dilution oversize products are formed by injecting washing water into the external enzyme reaction tank and diluting the oversize products), and the total flow of the dilution oversize products comprises two parts of fiber flow (oversize product flow) and washing water flow (external washing water flow), so that the reaction time of the enzyme preparation can be increased under the condition of not changing the conventional corn fiber treatment system.
Example one
Referring to fig. 2, a corn fiber processing system for extracting corn starch may include: a pressure curve screen group 1, a fiber washing tank group 2, an enzyme preparation adding device 3 and an external enzyme reaction tank 4. The pressure curve screen group 1 and the fiber washing tank group 2 are arranged in a matching way.
Wherein the pressure curved sieve set 1 has a plurality of stages of pressure curved sieves 11, the pressure curved sieves 11 are used for separating fiber pulp containing starch and protein into oversize (oversize fiber) and undersize (undersize wash water), and each stage of the pressure curved sieves 11 has a fiber pulp inlet 111, an oversize outlet 112 and an undersize outlet 113. For convenience of explanation, it is assumed that the pressure curved sieve group 1 has 6 stages of pressure curved sieves 11, which are respectively a pressure curved sieve N-2 (the pressure curved sieve at the leftmost end), a pressure curved sieve N-1 (the middle-stage pressure curved sieve), a pressure curved sieve N +1 (the middle-stage pressure curved sieve), a pressure curved sieve N +2 (the middle-stage pressure curved sieve), and a pressure curved sieve N +3 (the pressure curved sieve at the rightmost end).
In the embodiment of the utility model, except the pressure curved sieve at the leftmost end and the rightmost end, the residual pressure curved sieve can be called as a middle-stage pressure curved sieve; alternatively, only the pressure curved screen N is referred to as an intermediate-stage pressure curved screen. Wherein, the oversize mainly comprises wet fiber, attached starch and protein, etc., and the undersize mainly comprises undersize washing water, starch and protein, etc.; the undersize of the first stage (undersize output from the undersize outlet 113 of the pressure curved sieve N-2) is coarse starch milk, the undersize of the second stage (undersize output from the undersize outlet 113 of the pressure curved sieve N-1) is undersize separated from the pressure curved sieve (the pressure curved sieve N) of the last stage, and the starch milk concentration is lower and lower. Preferably, the intermediate stage pressure curved screen is any other stage pressure curved screen except the first stage and the last stage in the pressure curved screen group. More preferably, the middle-stage pressure curved screen refers to a pressure curved screen at a middle position, and if the number of the pressure curved screens is odd, the pressure curved screen at the middle position is referred to; if the number of the pressure curved sieves is even, the pressure curved sieve at the first middle position is referred to. As shown in fig. 2, the middle-stage pressure curved screen is a pressure curved screen N.
Further, the undersize of the pressure curved sieve 11 corresponding to the stage 1 flows toward the gluten separation system; the undersize of the pressure curved screen 11 corresponding to stage 2 flows to the feed surge tank 22 of the corn fiber system.
In the embodiment of the present invention, the pressure curved sieve 11 is used for separating the fiber slurry containing starch and protein into oversize and undersize, the pressure curved sieve 11 the oversize flows to the fiber washing tank 21 of the corresponding level in the fiber washing tank group 2 through the oversize outlet 112, the pressure curved sieve 11 the undersize flows to the fiber washing tank 21 before the fiber washing tank 21 of the corresponding level in the fiber washing tank group 2 through the undersize outlet 113. For example, the fiber washing tank 21 connected to the oversize outlet 112 of the pressure curved sieve 11 and the fiber washing tank 21 connected to the undersize outlet 113 of the pressure curved sieve 11 are not adjacent to each other, and are preferably separated by one fiber washing tank 21. In a preferred embodiment of the present invention, the undersize of the pressure curved sieve 11 flows to the small material chamber of the fiber washing tank 21 supplied by the pressure curved sieve in the fiber washing tank group 2 through the undersize outlet 113, and overflows to the previous fiber washing tank 21 through the small material chamber.
In a preferred embodiment of the present invention, the fiber washing tank 21 connected to the oversize outlet 112 of the pressure curved sieve 11 and the fiber washing tank 21 connected to the undersize outlet 113 of the pressure curved sieve 11 are separated by one step, as shown in fig. 2, the pressure curved sieve N-2 supplies the oversize fiber (oversize) to the fiber washing tank N-2, and supplies the undersize wash water to the gluten separation system; the pressure curved sieve N-1 supplies the fiber on the sieve to a fiber washing tank N-1, and supplies the washing water under the sieve to a front washing tank N-3 (namely a feeding buffer tank); the pressure curved sieve N supplies the fiber on the sieve to a fiber washing tank N, and supplies the washing water under the sieve to a fiber washing tank N-2; the pressure curved sieve N +1 supplies the fiber on the sieve to the fiber washing tank N +1, and supplies the washing water under the sieve to the fiber washing tank N-1; the pressure curved sieve N +2 supplies the fiber on the sieve to a fiber washing tank N +2, and supplies the washing water under the sieve to the fiber washing tank N; the pressure curved sieve N +3 supplies the fiber on the sieve to the fiber washing tank N +3, and supplies the washing water under the sieve to the fiber washing tank N + 1. In a more preferred embodiment of the present invention, the pressure curved screen N-2 supplies the fiber on the screen to the fiber washing tank N-2, and supplies the washing water under the screen to the gluten separation system; the pressure curved sieve N-1 supplies the fiber on the sieve to a fiber washing tank N-1, and supplies the washing water under the sieve to a front washing tank N-3 (namely a feeding buffer tank); the pressure curved sieve N supplies the fibers on the sieve to the fiber washing tank N, supplies the washing water under the sieve to a small material chamber of the fiber washing tank N-1, and overflows into the fiber washing tank N-2 through the small material chamber of the fiber washing tank N-1; the pressure curved sieve N +1 supplies the fibers on the sieve to the fiber washing tank N +1, supplies the washing water under the sieve to the small material chamber of the fiber washing tank N, and overflows into the fiber washing tank N-1 through the small material chamber of the fiber washing tank N; the pressure curved sieve N +2 supplies the fibers on the sieve to the fiber washing tank N +2, supplies the washing water under the sieve to the small material chamber of the fiber washing tank N +1, and overflows into the fiber washing tank N through the small material chamber of the fiber washing tank N + 1; the bent sieve N +3 of pressure will be sifted the fibre and supply with fibre wash tank N +3, will sift down and supply with fibre wash tank N + 2's little material room after the washing water, overflow to fibre wash tank N +1 in the little material room through fibre wash tank N +2, the utility model discloses do not use this as the limit.
The above is just one embodiment of the present invention, and the pressure curve screen group 1 and the fiber washing tank group 2 can be matched in the following way: the pressure curved sieve N-2 supplies the fiber on the sieve to the fiber washing tank N-2, and supplies the water under the sieve to the gluten separation system; the pressure curved sieve N-1 supplies the fiber on the sieve to the fiber washing tank N-1, and supplies the water under the sieve to the gluten separation system; the pressure curved sieve N supplies the fiber on the sieve to a fiber washing tank N, and supplies the washing water under the sieve to a preposed washing tank N-3; the pressure curved sieve N +1 supplies the fiber on the sieve to a fiber washing tank N +1, and supplies the washing water under the sieve to a fiber washing tank N-2; the pressure curved sieve N +2 supplies the fiber on the sieve to a fiber washing tank N +2, and supplies the washing water under the sieve to a fiber washing tank N-1; the bent sieve N +3 of pressure will be sifted the fibre and supply with fibre wash tank N +3, will sift and supply with fibre wash tank N behind the washing water, the utility model discloses not use this as the limit.
The fiber washing tank group 2 is used for providing a place for washing the fiber pulp by washing water, the fiber washing tank group 2 is provided with a plurality of stages of fiber washing tanks 21, and each stage of the fiber washing tanks 21 is provided with an oversize material inlet 211, an undersize material inlet 212 and an outlet 213. Also, for convenience of explanation, it is assumed that the fiber washing tub group 2 has 6 stages of fiber washing tubs 21, which are a fiber washing tub N-2, a fiber washing tub N-1, a fiber washing tub N +1, a fiber washing tub N +2, and a fiber washing tub N +3, respectively. Preferably, the middle-stage fiber washing tank refers to any other fiber washing tank except the first stage and the last stage in the middle-stage fiber washing tank group, i.e., any remaining fiber washing tank except the fiber washing tank N-2 and the fiber washing tank N + 3. More preferably, the middle fiber washing tank means a fiber washing tank located at a middle position, and if the number of the fiber washing tanks is an odd number, the middle fiber washing tank means a fiber washing tank located at a middle position; if the number of fiber washing tanks is an even number, the middle stage fiber washing tank means a fiber washing tank at a first middle position, for example, the middle stage fiber washing tank means a fiber washing tank N.
Further, in order to buffer the fiber slurry and better control the fiber washing process, a pre-washing tank N-3 may be further disposed at the front end of the fiber washing tank N-2, the pre-washing tank N-3 is also referred to as a feeding buffer tank 22, and receives the undersize of the pressure curved screen 11 (i.e., the pressure curved screen N-1) corresponding to the level 2 and the fiber material generated by the fine grinding system, and the undersize and the fiber material are fully mixed in the feeding buffer tank 22 to form the fiber slurry. In order to realize the counter-current washing of the corn fiber, the pressure curved sieve group 1 and the fiber washing tank group 2 are arranged in a matching way, and the fiber slurry output from the discharge port 213 of the fiber washing tank 21 is conveyed to the next-stage pressure curved sieve 11; the oversize fiber output from the oversize outlet 112 of the pressure curved sieve 11 is conveyed to the corresponding fiber washing tank 21, the undersize washing water output from the undersize outlet 113 of the pressure curved sieve 11 is conveyed to the upper two-stage fiber washing tank 21, so that the oversize fiber moves from the lower one-stage fiber washing tank 21 to the upper one-stage fiber washing tank 21, and the undersize washing water moves from the upper one-stage fiber washing tank 21 to the lower one-stage fiber washing tank 21, so that the corn fiber is washed in a countercurrent mode. For example, the fiber slurry output from the discharge port 213 of the fiber washing tank N +2 is conveyed to the pressure curved screen N + 3; the oversize fiber output from the oversize outlet 112 of the pressure curved screen N +3 is conveyed to the fiber washing tank N +3, and the undersize washing water output from the undersize outlet 113 of the pressure curved screen N +3 is conveyed to the fiber washing tank N + 1.
The enzyme preparation adding device 3 is used for adding the enzyme preparation to the corn fiber treatment system. The enzyme preparation is subjected to an enzymatic reaction with the fiber slurry, which allows the fiber slurry to release more free starch, bound starch and zein. The enzyme preparation adding device 3 can be an enzyme preparation adding pipeline, and the enzyme preparation adding pipeline 3 can be connected to an input pipeline externally connected with an enzyme reaction tank 4, as shown in fig. 2. In addition, the enzyme preparation adding pipeline 3 can also be connected to the oversize product outlet 112 of the middle-stage pressure curved sieve 11'; the enzyme preparation adding pipeline 3 can also be connected with an external enzyme reaction tank 4. Enzyme preparation can be artifical adds pipeline 3 through enzyme preparation and adds, can also utilize the pump to add through enzyme preparation adds pipeline 3 and adds, the utility model discloses not use this as the limit.
The external enzyme reaction tank 4 is connected with an oversize product outlet 112 of the middle-stage pressure curved sieve 11 ', the external enzyme reaction tank 4 is used for receiving the oversize product in the middle-stage pressure curved sieve 11 ' and providing an enzyme reaction site, and the oversize product in the external enzyme reaction tank 4 is returned to a fiber slurry inlet 111 of the next-stage pressure curved sieve 11 behind the middle-stage pressure curved sieve 11 ' through a return pipe 41 after a preset time. The external enzyme reaction tank 4 can be one tank or a combination tank formed by a plurality of tanks according to the space requirement of the equipment and the residence time requirement of the fiber pulp, and the specific form of the external enzyme reaction tank 4 is explained in the following examples, and the space requirement and the residence time requirement of the fiber pulp are not needed to be complicated. As shown in fig. 2, it is assumed that the fiber washing tank group 2 has a 6-stage fiber washing tank 21, the pressure curved sieve group 1 has a 6-stage pressure curved sieve 11, the middle-stage fiber washing tank is a fiber washing tank N, the middle-stage pressure curved sieve 11 'is a pressure curved sieve N, and the next-stage pressure curved sieve 11 behind the middle-stage pressure curved sieve 11' is a pressure curved sieve N + 1.
The pressure curved sieve group 1 is usually located at a very high position, and oversize materials of the middle-stage pressure curved sieve 11' automatically flow into the external enzyme reaction tank 4 under the action of self gravity without an external pump. In addition, in order to make the oversize material flow smoothly in the external enzyme reaction tank 4, a pump may be disposed at the material return pipe 41 of the external enzyme reaction tank 4 to return the oversize material or diluted oversize material output from the external enzyme reaction tank 4 to the fiber slurry inlet 111 of the next-stage pressure curved sieve 11, so as to promote the fiber slurry flow. In addition, oversize products output by the middle-stage pressure curved sieve 11' can stay in the external enzyme reaction tank 4 for a period of time, the external enzyme reaction tank 4 prolongs the reaction time of an enzyme preparation, and the yield of the corn starch and/or the corn protein is further improved.
Example two
Referring to fig. 3, the dry fiber concentration of the oversize fibers affects the performance of the enzyme preparation, and for better performance of the enzyme preparation, the dry fiber concentration should be between 4% and 6% (non-dry fiber in the fiber slurry is washed away by a 75 μm sieve). The lower concentration of the dry fiber can lead to lower performance of the enzyme preparation, but the concentration of the dry fiber of the oversize product output by the middle-stage pressure curved sieve 11' is generally 7% -8%, and the concentration of the dry fiber is too high, so that the oversize product is not beneficial to flowing in the external enzyme reaction tank 4, and therefore, the concentration of the dry fiber of the oversize product is controlled to be beneficial to promoting the flowing of the oversize product in the external enzyme reaction tank 4. According to the description of the first embodiment, the external enzyme reaction tank 4 has the water injection inlet 42 for adjusting the dry fiber concentration of the oversize product in the external enzyme reaction tank 4, and the washing water can be injected through the water injection inlet 42, so that the dry fiber concentration of the oversize product in the external enzyme reaction tank 4 is between 4% and 6%, the oversize product (i.e. diluted oversize product) diluted by the washing water smoothly circulates in the external enzyme reaction tank 4, and the enzyme preparation obtains better performance.
The utility model discloses an in the preferred embodiment, the external water injection entry 42 is used for adjusting the water injection pipeline 43 of the dry thing concentration of the fibre of oversize thing in external enzyme retort 4, the washing water outside water injection pipeline 43 lug connection corn fiber processing system, the dry thing concentration of the fibre of oversize thing in external enzyme retort 4 is from 7% ~ 8% dilution to 4% ~ 6%, lets the smooth circulation of the oversize thing that dilutes through washing water in external enzyme retort 4 to make the enzyme preparation obtain better performance.
More preferably, the first flow control device 5 is arranged near the water injection inlet 42 to control the amount of the washing water injected into the external enzyme reaction tank 4, so that the concentration of the dry fiber matters of the oversize products in the external enzyme reaction tank 4 is diluted from 7% -8% to 4% -6%, the oversize products diluted by the washing water smoothly flow in the external enzyme reaction tank 4, and the enzyme preparation obtains better performance. Because the total water amount in the corn fiber treatment system is changed by injecting the washing water into the external enzyme reaction tank 4, the washing water injected into the corn fiber treatment system needs to be correspondingly reduced according to the water injection amount received by the external enzyme reaction tank 4, that is, the washing water amount injected into the corn fiber treatment system is correspondingly reduced according to the water injection amount, so as to keep the total water amount (total washing water amount) of the corn fiber treatment system unchanged.
Referring again to fig. 3, in a preferred embodiment of the present invention, a second flow control device 6 is disposed near the washing water inlet 7 of the corn fiber treatment system for controlling the water inflow of the washing water externally connected to the corn fiber treatment system. Preferably, the amount of washing water injected into the external enzyme reaction tank 4 is equal to the amount of washing water injected by the washing water inlet 7, so that the total water amount of the corn fiber treatment system is kept unchanged, and the dry fiber concentration of the whole fiber slurry in the fiber washing tank 21 in the original corn fiber treatment system is not changed.
In the embodiment of the present invention, the first flow control device 5 and the second flow control device 6 may be flow meters or flow valves or electromagnetic flow valves, etc. The first flow control device 5 and the second flow control device 6 can be manually operated by workers, so that the amount of washing water injected into the externally-connected enzyme reaction tank 4 is equal to the reduction amount of the washing water injected into the washing water inlet 7. Automatic control can also be realized, for example, a processor is arranged and simultaneously connected with the first flow control device 5 and the second flow control device 6, the processor obtains the amount of washing water injected into the external enzyme reaction tank 4 from the first flow control device 5, the second flow control device 6 is controlled according to the amount of washing water injected into the external enzyme reaction tank 4, the amount of washing water injected through the washing water inlet 7 is reduced, the processor can adopt a Digital Signal Processor (DSP), a single chip microcomputer, an Application Specific Integrated Circuit (ASIC), an FPGA (field programmable gate array), an SoC (system on chip) and the like, and the processor selects common existing data processing components, so that the details are not repeated.
FIG. 4 is a graph showing the relationship between the concentration of dry fiber and the relative yield of starch and protein on fiber, and it can be seen from FIG. 4 that the relative yield of starch and protein on fiber is more than 80% when the concentration of dry fiber is 4% -6%. The specific calculation method of the dry fiber concentration comprises the following steps: taking 200g of diluted oversize product in an external enzyme reaction tank, fully washing the oversize product with water on a 75-micron sieve, washing dry matters except fibers, drying the fibers in a 105-DEG oven to absolute dry weight, weighing, and dividing by the total weight of 200g to obtain the concentration of the dry matters of the fibers.
EXAMPLE III
In the corn fiber treatment system, oversize products from the middle-stage pressure curved sieve 11' and washing water from a water injection inlet 42 of the external enzyme reaction tank 4 are converged in the external enzyme reaction tank 4 to form diluted oversize products, the diluted oversize products and the washing water are uniformly mixed to reach relatively stable concentration of dry fiber products, the first flow control device 5 can be controlled according to the concentration of the dry fiber products of the diluted oversize products in the external enzyme reaction tank 4, so that the amount of the washing water injected into the external enzyme reaction tank 4 is controlled, the concentration of the dry fiber products of the diluted oversize products is adjusted, the concentration of the dry fiber products of the diluted oversize products in the external enzyme reaction tank 4 is kept at 4% -6%, and an enzyme preparation is in a better reaction state.
Furthermore, a processor is simultaneously electrically connected with the first flow control device 5 and the second flow control device 6, the processor controls the opening degree of the first flow control device 5 according to the dry matter concentration of the diluted oversize matters in the external enzyme reaction tank 4, and controls the washing water injected into the external enzyme reaction tank 4, so that the intelligent control of the concentration of the fiber dry matters of the diluted oversize matters in the external enzyme reaction tank 4 is realized. For example, when the dry fiber concentration of the dilution oversize product in the external enzyme reaction tank 4 is lower than 4% to 6%, the opening degree of the first flow control device 5 is increased, and when the dry fiber concentration of the dilution oversize product in the external enzyme reaction tank 4 is higher than 4% to 6%, and the viscosity of the dilution oversize product is too high, the opening degree of the first flow control device 5 is decreased. The first flow rate control device 5 may be a pneumatic flow rate control valve such as a siemens VVF43 type pneumatic flow rate control valve or an electromagnetic flow meter such as a siemens SITRANS F M MAG1100 type electromagnetic flow meter. Further, the processor obtains the amount of washing water injected into the external enzyme reaction tank 4 from the first flow control device 5, controls the second flow control device 6 according to the amount of washing water injected into the external enzyme reaction tank 4, reduces the amount of washing water injected through the washing water inlet 7, and keeps the total water amount (total washing water amount) of the corn fiber treatment system unchanged. The second flow control device 6 may be a pneumatic flow control valve such as a siemens VVF43 type pneumatic flow control valve or an electromagnetic flow meter such as a siemens SITRANS F M MAG1100 type electromagnetic flow meter.
Example four
Referring to fig. 5, the number of the external enzyme reaction tank 4 is only one, the external enzyme reaction tank 4 is a horizontal enzyme reaction tank in form, so that the space occupation of the external enzyme reaction tank 4 is reduced, and the horizontal enzyme reaction tank is composed of a plurality of chambers. As shown in fig. 5, the horizontal enzyme reaction tank has a plurality of first chambers 44 horizontally arranged and first stirring devices 45 corresponding to the first chambers 44, and the dilution screen materials can sequentially flow between the first chambers 44.
Preferably, the horizontal enzyme reaction tank has a plurality of semi-closed partition plates 46 arranged alternately up and down, the semi-closed partition plates are used for dividing the horizontal enzyme reaction tank into a plurality of first chambers 44, and the dilution oversize products are in a sine wave shape or an S shape on the whole of the flow lines of the plurality of first chambers 44, so that the dilution oversize products are fully stirred, and the reaction efficiency of the enzyme preparation is improved. In order to smoothly circulate the dilution oversize in the horizontal enzyme reaction tank, a pump P may be provided on the return pipe 41 of the horizontal enzyme reaction tank to promote the circulation of the dilution oversize.
EXAMPLE five
As shown in fig. 6, the external enzyme reaction tank 4 is a continuous reaction tank, the external enzyme reaction tank 4 is a plurality of reaction tanks, the reaction tanks are connected in series, and a second stirring device 47 is arranged in each reaction tank. Dilution oversize products enter from the top end of each reaction tank and flow out from the bottom end of each reaction tank (also called an up-flow reaction tank), and in order to better circulate the dilution oversize products in the reaction tanks, a pump P is sometimes arranged near the bottom end of each reaction tank to promote the continuous circulation of the dilution oversize products in the reaction tanks.
EXAMPLE six
As shown in fig. 7, the external enzyme reaction tank 4 is a continuous reaction tank, the external enzyme reaction tank 4 is a plurality of reaction tanks, the reaction tanks are connected in series, dilution oversize products enter from the bottom end of each reaction tank (also called as a bottom-entering reaction tank) and flow out from the top end of each reaction tank, the middle-stage pressure curved sieve 11' conveys the dilution oversize products to the reaction tanks, and the dilution oversize products are pushed to continuously flow in the reaction tanks by the thrust of the subsequent dilution oversize products. Compared with the figure 6, the external enzyme reaction tank 4 is not provided with a stirring device, the diameter of each reaction tank is not more than 1.2 meters, and the external enzyme reaction tank 4 is also called a laminar flow column, so that the cost can be further saved. In order to make the diluted oversize products in the external enzyme reaction tank 4 finally and smoothly flow back to the fiber slurry inlet 111 of the next-stage pressure curved sieve 11 behind the middle-stage pressure curved sieve 11', a pump P can be arranged on the feed back pipe 41 of the external enzyme reaction tank 4, and the arranged pump P simultaneously promotes the diluted oversize products to sequentially flow in a plurality of reaction tanks connected in series.
EXAMPLE seven
As shown in fig. 8, the external enzyme reaction tank 4 is a vertical enzyme reaction tank having a plurality of second chambers 48 vertically arranged and third stirring devices 49 corresponding to the second chambers 48, and the fiber slurry can sequentially flow between the second chambers 48. The third stirring device 49 has a plurality of vertically arranged stirring blades, the stirring blades correspond to the second chambers one by one, the second chambers are communicated with each other in sequence, and the stirring blades stir the fiber slurry in the corresponding second chambers. In order to make the diluted oversize material in the external enzyme reaction tank 4 finally smoothly flow back to the fiber slurry inlet 111 of the next-stage pressure curved sieve 11 behind the middle-stage pressure curved sieve 11', a pump P can be arranged on the feed back pipe 41 of the external enzyme reaction tank 4.
In the preferred embodiment of the present invention, the vertical enzyme reaction tank has a plurality of hollow-out baffles 49B arranged one above the other. If the vertical enzyme reaction tank is cylindrical, the baffle plate 49B is a circular ring; if the vertical enzyme reaction tank is in the shape of a square column, the baffle plate 49B is in the shape of a square. The baffle 49B is used for dividing the vertical enzyme reaction tank into a plurality of second chambers 48 which are distributed up and down, and due to the existence of the baffle 49B, the third stirring device 49 can fully stir and dilute oversize products, so that the reaction efficiency of the enzyme preparation is improved.
As shown in fig. 9, embodiments of the present invention also provide a corn wet milling starch processing system including a corn crushing system 100, a germ separation and washing system 200, a fine milling system 300, a fiber treatment system 400, a fiber dewatering and drying system 500, a gluten separation and drying system 600, a protein separation and drying system 700, and a starch washing, dewatering and drying system 800. The fiber treatment system 400 may include: the device comprises a pressure curve screen group 1, a fiber washing tank group 2, an enzyme preparation adding device 3, an external enzyme reaction tank 4, a first flow control device 5, a second flow control device 6, a washing water inlet 7 and the like. The enzyme preparation adding device 3, the external enzyme reaction tank 4, the first flow control device 5, the second flow control device 6, the washing water inlet 7, and the like can be used in the first to seventh embodiments, and for the sake of brevity, the matching manner of the pressure curved sieve set 1 and the fiber washing tank set 2 is not repeated, and the structures, functions, and connection position relationships of the enzyme preparation adding device 3, the external enzyme reaction tank 4, the first flow control device 5, the second flow control device 6, the washing water inlet 7, and the like are described in detail.
Further, the volume of the external enzyme reaction tank 4 and the flow rate of the fiber pulp are wet-milled by cornThe daily corn throughput of the starch processing system is determined, for example, the corn wet-milling starch processing system with 1500 tons of corn in daily throughput, and the volume of the external enzyme reaction tank 4 is 200m3。
The foregoing is only an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principles of the present invention should fall within the protection scope of the present invention.
Claims (13)
1. A corn fiber processing system for extracting corn starch, the system comprising: a pressure curve sieve group (1), a fiber washing tank group (2), an enzyme preparation adding device (3) and an external enzyme reaction tank (4), wherein,
the pressure curved screen group (1) is provided with a plurality of stages of pressure curved screens (11), the pressure curved screens (11) are used for separating fiber pulp containing starch and protein into oversize and undersize, and each stage of the pressure curved screens (11) is provided with a fiber pulp inlet (111), an oversize outlet (112) and an undersize outlet (113);
the fiber washing tank group (2) is used for providing a place for washing the fiber pulp by washing water, the fiber washing tank group (2) is provided with a plurality of stages of fiber washing tanks (21), and each stage of the fiber washing tanks (21) is provided with an oversize material inlet (211), an undersize material inlet (212) and a material outlet (213);
the enzyme preparation adding device (3) is used for adding the enzyme preparation to the corn fiber treatment system; and
the external enzyme reaction tank (4) is connected with an oversize product outlet (112) of the middle-stage pressure curved sieve (11 '), the external enzyme reaction tank (4) is used for receiving the oversize product in the middle-stage pressure curved sieve (11 ') and providing an enzyme reaction site, and the oversize product is returned to a fiber pulp inlet (111) of the next-stage pressure curved sieve (11) behind the middle-stage pressure curved sieve (11 ') through a return pipe (41) after a preset time.
2. The corn fiber treatment system of claim 1, wherein the external enzyme reaction tank (4) has a water injection inlet (42) for adjusting the dry fiber concentration in the external enzyme reaction tank (4).
3. The corn fiber treatment system according to claim 2, wherein the water injection inlet (42) is externally connected with a water injection pipeline (43) for adjusting the concentration of the dry fiber in the externally connected enzyme reaction tank (4).
4. The corn fiber processing system of claim 2, further comprising:
and the first flow control device (5) is arranged at the water injection inlet (42) and is used for controlling the water injection amount received by the external enzyme reaction tank (4).
5. The corn fiber treatment system of claim 4, further comprising a wash water injection adjustment device for reducing the amount of wash water injected into the corn fiber treatment system in response to the amount of water injected to maintain the total amount of water in the corn fiber treatment system constant.
6. The corn fiber processing system of claim 2, further comprising:
and the second flow control device (6) is arranged at a washing water inlet (7) of the corn fiber treatment system and is used for controlling the water inflow of the external washing water of the corn fiber treatment system.
7. The corn fiber treatment system of claim 1, wherein the enzyme preparation addition device (3) is an enzyme preparation addition conduit.
8. The corn fiber treatment system according to claim 1, wherein the external enzyme reaction tank (4) is a horizontal enzyme reaction tank having a plurality of first chambers (44) horizontally arranged and first stirring devices (45) corresponding to the first chambers (44), and the fiber slurry can sequentially circulate between the first chambers (44).
9. The corn fiber processing system of claim 8, wherein the horizontal enzyme reactor has a plurality of semi-enclosed partition panels (46) arranged alternately above and below the horizontal enzyme reactor for dividing the horizontal enzyme reactor into the plurality of first compartments (44).
10. The corn fiber treatment system according to claim 1, wherein the external enzyme reaction tank (4) is a plurality of continuous reaction tanks connected in series, and a second stirring device (47) is arranged in the continuous reaction tanks.
11. The corn fiber treatment system according to claim 1, wherein the external enzyme reaction tank (4) is a vertical enzyme reaction tank having a plurality of second chambers (48) vertically arranged and third stirring devices (49) corresponding to the second chambers (48), and the fiber slurry can sequentially circulate between the second chambers (48).
12. A corn wet milling starch processing system characterized in that it contains a corn fiber treatment system (400) selected from any one of claims 1 to 11.
13. The corn wet milling starch processing system as claimed in claim 12, wherein the system comprises a corn disruption system (100), a germ separation and washing system (200), a fine milling system (300), a fiber treatment system (400), a fiber dewatering and drying system (500), a gluten separation and drying system (600), a protein separation and drying system (700), and a starch washing, dewatering and drying system (800).
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| CN113278664A (en) * | 2021-05-17 | 2021-08-20 | 齐齐哈尔龙江阜丰生物科技有限公司 | Process for degrading corn epidermal fibers by cellulase |
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| CN113278664A (en) * | 2021-05-17 | 2021-08-20 | 齐齐哈尔龙江阜丰生物科技有限公司 | Process for degrading corn epidermal fibers by cellulase |
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