CN112745396A - Fiber washing process for reducing powder content of fiber - Google Patents
Fiber washing process for reducing powder content of fiber Download PDFInfo
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- CN112745396A CN112745396A CN202011583281.XA CN202011583281A CN112745396A CN 112745396 A CN112745396 A CN 112745396A CN 202011583281 A CN202011583281 A CN 202011583281A CN 112745396 A CN112745396 A CN 112745396A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B30/00—Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin
- C08B30/02—Preparatory treatment, e.g. crushing of raw materials or steeping process
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B30/00—Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin
- C08B30/04—Extraction or purification
- C08B30/042—Extraction or purification from cereals or grains
- C08B30/044—Extraction or purification from cereals or grains from corn or maize
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- Organic Chemistry (AREA)
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Abstract
A fiber washing process for reducing fiber dust content, comprising the following operations: and (3) passing the fiber washing water in the reaction tank through a nozzle sequentially by a 7-stage washing pump, a 6-stage washing pump, a 5-stage washing pump, a 4-stage washing pump, a 3-stage washing pump, an enzyme preparation feeding reaction tank, a 2-stage washing pump, a 1-stage washing pump and a fiber separation pump to obtain fiber pulp. The invention has the advantages that: the invention uses cellulase preparation retention reaction to reduce the technical transformation of fiber powder content, realizes the guide of fiber reaction time into a workshop system by transforming a reaction tank through a precipitation tank, reduces the lifting rate of fiber powder content and wet fiber moisture and saves steam.
Description
Technical Field
The invention belongs to the field of starch production, and particularly relates to a fiber washing process for reducing fiber powder content.
Background
The corn wet milling process means that corn kernels are softened after being soaked in sulfurous acid, and all components are loosened. In order to separate the components, the germ is freed and first broken. The crushing purpose is to crush the corn into pieces and separate the germ. In the ground corn pieces from which the germ is separated by crushing, the seed coat and the cuticle of the corn kernel remain associated with the endosperm, and in order to break the association of starch and non-starch fractions, the starch granules are separated from the protein granules in the endosperm, which are further finely ground in order to separate the fibres in order to maximise the liberation of starch. Mainly by impact grinding, also known as pin grinding. After washing the starch-containing fiber for several times, dehydrating the starch-containing fiber by a fiber extruding machine, and drying the starch-containing fiber in a tube bundle dryer to obtain the byproduct fiber. The starch milk after fiber separation also contains more non-starch substances such as protein, fat, ash and the like, particularly has higher protein content, and can obtain cleaner starch only by separating the non-starch substances. Starch and gluten contained in the fine starch milk have great differences in specific gravity, particle size, and the like, and by utilizing these differences, centrifugal separation, cyclone separation, and air flotation separation are classified according to principles and operation methods. The starch milk containing gluten is pumped into the center of the disc rack in the rotary drum by the feeding device at the upper part of the separator and is rapidly distributed among the discs. The high-speed rotating drum drives the material to rotate at high speed, so that a great centrifugal force is generated, the relative density (specific gravity) difference of the solid matter is increased by a plurality of times, and the starch granules with large relative density (specific gravity) obtain a great centrifugal force and are discharged from a nozzle on the inner wall of the drum along the downward direction of the disc to the outer edge to form underflow (heavy-phase coarse starch milk). The gluten with low relative density (specific gravity) is discharged to the central pump along with the washing water flow along the disc to form overflow (light-phase protein powder).
At present, fiber washing and soaking processes in the starch production process are more important operation processes, and continuous overflow washing is adopted for fiber washing at present to separate free starch from protein powder in the fiber. And (4) squeezing the washed fiber mixed solution. At present, in the existing washing process, fiber washing water sequentially starts a 7-stage washing pump → a 6-stage washing pump → a 5-stage washing pump → a 4-stage washing pump → a 3-stage washing pump → a 2-stage washing pump → a 1-stage washing pump → a fiber separation pump to finally obtain fiber pulp, and then water is removed to obtain fibers, but the powder content of the fibers obtained by the prior art is 18-22%, the content of the starch and protein powder is high, the yield and the quality of starch products are influenced, the moisture lifting rate of wet fibers is low, and the steam energy consumption is high.
Disclosure of Invention
The invention provides a fiber washing process for reducing fiber powder content, which is used for overcoming the defects in the prior art.
The invention is realized by the following technical scheme:
a fiber washing process for reducing fiber dust content, comprising the following operations: crushing corns, adding water, mixing and soaking, filtering, performing subsequent treatment on filtrate, sequentially passing fiber washing water in a reaction tank through a 7-level washing pump, a 6-level washing pump, a 5-level washing pump, a 4-level washing pump, a 3-level washing pump, an enzyme preparation adding reaction tank, a 2-level washing pump, a 1-level washing pump and a fiber separation pump through a nozzle to obtain fiber pulp.
The fiber washing process for reducing the fiber powder content has the filter pore size of 50-100 mu m.
The fiber washing process for reducing fiber powder content has the advantages that the fiber washing water amount entering the 7-stage washing pump is controlled to be 110-120m3/h。
The fiber washing process for reducing fiber powder content is characterized in that the feeding pressure of the washing pressure curved sieve of the 7-stage washing pump, the 6-stage washing pump, the 5-stage washing pump, the 4-stage washing pump, the 3-stage washing pump, the 2-stage washing pump and the 1-stage washing pump is controlled to be 0.2-0.4 Mpa.
In the fiber washing process for reducing the fiber powder content, the feeding pressure of the fiber separating screen of the fiber separating pump is controlled to be 0.2-0.4 MPa.
In the fiber washing process for reducing fiber powder, the liquid concentration of the fiber separating screen of the fiber separating pump is kept between 2 and 5 Be/.
The invention has the advantages that: the invention uses cellulase preparation retention reaction to reduce the technical modification of fiber powder content, realizes the guide of fiber reaction time into a workshop system by modifying the reaction tank through the precipitation tank, reduces the improvement rate of fiber powder content and wet fiber moisture and saves steam, and simultaneously can effectively improve the yield and quality of starch products.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the operation structure of the process flow of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A fiber washing process for reducing fiber dust content, comprising the following operations: and (3) passing the fiber washing water in the reaction tank through a nozzle sequentially by a 7-stage washing pump, a 6-stage washing pump, a 5-stage washing pump, a 4-stage washing pump, a 3-stage washing pump, an enzyme preparation feeding reaction tank, a 2-stage washing pump, a 1-stage washing pump and a fiber separation pump to obtain fiber pulp.
Specifically, the amount of fiber wash water entering the 7-stage washing pump of the present embodiment is controlled to be 110-120m3/h。
Specifically, the feeding pressure of the washing pressure curved sieve of the 7-stage washing pump, the 6-stage washing pump, the 5-stage washing pump, the 4-stage washing pump, the 3-stage washing pump, the 2-stage washing pump and the 1-stage washing pump in the embodiment is controlled to be 0.2-0.4 Mpa.
Further, the feeding pressure of the fiber separating screen of the fiber separating pump in the embodiment is controlled to be 0.2-0.4 Mpa.
Furthermore, the liquid concentration of the defibration screen of the defibration pump according to the present embodiment is maintained at 2-5 Be/.
The results of comparing the fiber powder content, wet fiber moisture and steam consumption in the present invention with those of the prior art are shown in table one.
| Item | The process of the invention | Prior Art | Difference between them |
| Fiber powder content (%) | 20 | 14 | -6 |
| Moisture content of wet fiber (%) | 59.33 | 54 | -5.33 |
| Steam consumption (kg) | 490 | 440 | -50 |
| Percentage of starch (%) | 69.9％ | 70.3％ | 0.4％ |
| Percentage of protein powder (%) | 5.4％ | 5.5％ | 0.1％ |
| Percentage of fiber | 10.5％ | 10.2％ | 0.3％ |
Watch 1
As can be seen from the data in the table, compared with the prior art, the yield of starch is improved by 0.4%, the yield of protein powder is improved by 0.1%, and the yield of fiber is reduced by 0.3% after the cellulase preparation is added. The steam consumption is reduced by 50 kg/ton starch, thereby improving the product yield and the product quality.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A fiber washing process for reducing fiber powder content is characterized in that: the method comprises the following operations: crushing corns, adding water, mixing and soaking, filtering, performing subsequent treatment on filtrate, sequentially passing fiber washing water in a reaction tank through a 7-level washing pump, a 6-level washing pump, a 5-level washing pump, a 4-level washing pump, a 3-level washing pump, an enzyme preparation adding reaction tank, a 2-level washing pump, a 1-level washing pump and a fiber separation pump through a nozzle to obtain fiber pulp.
2. A fiber washing process for reducing fiber dusting as claimed in claim 1 wherein: the filter pore size is 50-100 μm.
3. Fiber washing process for reducing fiber dust content according to claim 1The method is characterized in that: the fiber washing water quantity of the inlet 7-stage washing pump is controlled at 110-120m3/h。
4. A fiber washing process for reducing fiber dusting as claimed in claim 1 wherein: the feeding pressure of the washing pressure curved sieve of the 7-level washing pump, the 6-level washing pump, the 5-level washing pump, the 4-level washing pump, the 3-level washing pump, the 2-level washing pump and the 1-level washing pump is controlled to be 0.2-0.4 Mpa.
5. A fiber washing process for reducing fiber dusting as claimed in claim 1 wherein: the feeding pressure of the fiber separating screen of the fiber separating pump is controlled to be 0.2-0.4 MPa.
6. A fiber washing process for reducing fiber dusting as claimed in claim 1 wherein: the liquid concentration of the fiber separating screen of the fiber separating pump is kept between 2 and 5 Be/.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011583281.XA CN112745396A (en) | 2020-12-28 | 2020-12-28 | Fiber washing process for reducing powder content of fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011583281.XA CN112745396A (en) | 2020-12-28 | 2020-12-28 | Fiber washing process for reducing powder content of fiber |
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| CN112745396A true CN112745396A (en) | 2021-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050020472A1 (en) * | 2002-01-23 | 2005-01-27 | Beatrix Kottwitz | Cellulase and cellulose containing detergent |
| US20120301597A1 (en) * | 2011-05-24 | 2012-11-29 | Poet Research, Inc. | Systems and methods for producing a composition of fiber |
| CN106832009A (en) * | 2017-03-01 | 2017-06-13 | 中粮生化能源（龙江）有限公司 | A kind of method for producing cornstarch in corn wet milling production technology using cellulase preparation |
| CN109776689A (en) * | 2019-01-15 | 2019-05-21 | 迈安德集团有限公司 | A kind of processing technology of corn |
| CN209602429U (en) * | 2018-12-21 | 2019-11-08 | 诺维信公司 | Zein fiber processing system and the corn wet milling starch processing system for applying it |
-
2020
- 2020-12-28 CN CN202011583281.XA patent/CN112745396A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050020472A1 (en) * | 2002-01-23 | 2005-01-27 | Beatrix Kottwitz | Cellulase and cellulose containing detergent |
| US20120301597A1 (en) * | 2011-05-24 | 2012-11-29 | Poet Research, Inc. | Systems and methods for producing a composition of fiber |
| CN106832009A (en) * | 2017-03-01 | 2017-06-13 | 中粮生化能源（龙江）有限公司 | A kind of method for producing cornstarch in corn wet milling production technology using cellulase preparation |
| CN209602429U (en) * | 2018-12-21 | 2019-11-08 | 诺维信公司 | Zein fiber processing system and the corn wet milling starch processing system for applying it |
| CN109776689A (en) * | 2019-01-15 | 2019-05-21 | 迈安德集团有限公司 | A kind of processing technology of corn |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Application publication date: 20210504 |