CN104193833A - Process for screening and refining wheat starch - Google Patents
Process for screening and refining wheat starch Download PDFInfo
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- CN104193833A CN104193833A CN201410405472.5A CN201410405472A CN104193833A CN 104193833 A CN104193833 A CN 104193833A CN 201410405472 A CN201410405472 A CN 201410405472A CN 104193833 A CN104193833 A CN 104193833A
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Abstract
The invention discloses a process for screening and refining wheat starch. The process comprises the following steps: screening starch slurry material by a 250-mesh primary centrifugal screen at the rotation speed of 900r/min, screening oversize materials by a 200-mesh secondary centrifugal screen at a rotation speed of 900r/min, collecting the undersized materials screened out by the primary and the secondary centrifugal screen and feeding into a primary horizontal-spiral decanter centrifuge for separation treatment, wherein obtained light-phase substances such as soluble proteins and sugar can be treated in other ways, the obtained starch phase is concentrated by a secondary horizontal-spiral decanter centrifuge to obtain the finished starch slurry; and drying the finished starch slurry to obtain the standard finished starch product. Compared with the prior art, the process has the advantages of simple technology and reduction of energy consumption due to the use of the horizontal-spiral decanter centrifuge instead of the cyclone separator unit used in the conventional processes.
Description
Technical field
The present invention relates to wheat deep processing technology, especially relate to a kind of screening and process for refining of wheat starch.
Background technology
At present; in the course of processing of wheat starch; take wheat grain or wheat-flour as raw material, and the starch of separating by three-phase decanter whizzer comprises time heavy phase (raw slurry that contains A starch), heavy phase (raw slurry that contains B starch), C starch phase (the slurry stoste that contains C starch) mutually.A starch be exactly from A starch mutually the refining particle diameter out of screening within the scope of 10 ~ 38 μ m and meet the starch of wheat starch national standard, its project indicator need meet: moisture (%)≤14; Acidity (butt)/
0t≤2.0 ~ 3.5; Ash content (butt %)≤0.25 ~ 0.4; Protein (butt %)≤0.3 ~ 0.5; Spot (individual/square centimeter)≤2.00 ~ 4.00; Fineness 150 (%, m/m) (100 mesh sieve percent of pass (%)>=99.80 ~ 98.0; Whiteness/%>=93.0 ~ 91.0; Viscosity 6% concentration starch paste (mPa.s)>=50.0 ~ 45.0; Fat (butt %)≤0.07 ~ 0.15.B starch is called again tail starch, sludge starch or scrapes slurry starch, starch particle diameter is less than 10 μ m, the mixture that B starch in macroscopic view is comprised of starch granule, piperylene, cell wall substance and damaged starch, typically refer to the refuse that while producing A starch, centrifuge scrapes off, or the starch phase after the separated gluten of three-phase decanter heavy phase.C starch is commonly referred to piperylene phase mutually, refers in particular to the gently mutually dried product that three-phase decanter is separated.
At present to the screening of A starch and process for refining, be: the A farinaceous size raw material first three-phase decanter being obtained carries out classification by centrifugal screen, screen underflow repeated to screening and purify, then by swirler, the starch sieving out is carried out to purification.Owing to containing part gluten the A farinaceous size of separating from three-phase decanter whizzer, not only can cause gluten powder yield to decline, simultaneously in follow-up screening process, gluten is easily stuck with paste on the screen cloth of centrifugal screen, causing starch screening difficulty, simultaneously in starch screening process, is generally by screen underflow repeated to the screening starch of purifying, so equipment energy consumption is higher and screen cloth rapid wear, the replacement cycle is short; At refining stage, normally by swirler, carry out purification, because the refining effect of swirler is poor, energy consumption is higher, and material residence time in swirler is longer, and temperature raises has affected again the quality of A starch.
B starch is being added to man-hour, owing to containing a large amount of carbohydrates and albumen in B farinaceous size raw material, viscosity is higher, cause screening and treating process difficulty, in B farinaceous size raw material, also contain in addition part A starch, and this part A starch is not extracted in current production technique, caused the reduction of A starch yield.
For C starch, do not have at present good processing mode.Owing to containing a large amount of starch, carbohydrate and albumen in C starch phase (being also called piperylene phase), though nutritious (because wherein contain a lot of beneficiating ingredients, as piperylene etc.), but easily fermentation is rotten, so C starch phase (slurry condition) can not store for a long time, generally it for example, is sold as the raw material of producing other products (alcohol), added value is very low.
Summary of the invention
The object of the present invention is to provide a kind of screening and process for refining of new wheat starch.
For achieving the above object, the present invention can take following technical proposals:
Screening and the process for refining of wheat starch of the present invention comprise the steps:
Farinaceous size raw material is sieved by first-stage centrifugal, screen overflow enters secondary centrifugal screen and sieves, the screen cloth of described first-stage centrifugal sieve is 250 orders, rotating speed 900r/min, the screen cloth of described secondary centrifugal screen is 200 orders, rotating speed 900r/min, collect the screen underflow of one-level, secondary centrifugal screen, send into the sleeping spiral shell of one-level and carry out separating treatment, the light phase material otherwise processed such as the soluble protein obtaining, carbohydrate, the starch obtaining enters mutually the sleeping spiral shell of secondary and concentrates, and obtains finished product farinaceous size, drying, can obtain standard compliant finished product of starch.
If farinaceous size raw material is A farinaceous size raw material, before entering first-stage centrifugal sieve, need to first pass through rotary strainer or plansifter filtration treatment, the screen-aperture of rotary strainer used or plansifter is 1mm, gluten in A starch slurry raw material is filtered out, remaining slurries enter the processing that secondary centrifugal screen carries out subsequent handling again, , screening out slurries after gluten enters after by the screening of secondary centrifugal screen while processing in one-level horizontal screw centrifuge, its separating factor can reach more than 3000, it is concentrated that isolated heavy phase A farinaceous size enters the sleeping spiral shell of secondary, obtain after drying standard compliant A finished product of starch.
If farinaceous size raw material is B farinaceous size raw material, before entering first-stage centrifugal sieve, need first in slurries raw material, to add prozyme, the add-on of prozyme is 1% ~ 3% of slurries raw material, during actual use, the add-on of prozyme can be adjusted according to the concentration of slurries raw material: when concentration is large, add-on can be more, and when concentration is low, add-on can be smaller; Collect the screen underflow of one-level, secondary centrifugal screen and send into the sleeping spiral shell processing of one-level, together with can mixing then with the heavy phase of the sleeping spiral shell of A starch one-level after the isolated heavy phase A farinaceous size collection of the sleeping spiral shell of one-level, enter the sleeping spiral shell of secondary concentrated, isolated light phase B farinaceous size directly enters the sleeping spiral shell of secondary and concentrates, and obtains after drying standard compliant B finished product of starch.
Add prozyme in B farinaceous size raw material by proteolytic enzyme and pentosanase by composite the forming of weight part proportioning of 1:3 ~ 1:5, its objective is the carbohydrate in order to degrade in B farinaceous size raw material, destroy the combination of carbohydrate and albumen, the viscosity of B farinaceous size raw material is reduced.
If farinaceous size raw material is C farinaceous size raw material,, before entering first-stage centrifugal sieve, need first in slurries raw material, to add prozyme, the add-on of prozyme is 2% ~ 5% of slurries raw material; Equally, the add-on of prozyme can be adjusted according to the concentration of slurries raw material: when concentration is large, add-on can be more, and when concentration is low, add-on can be smaller; The C starch slurry obtaining by bipyramid crouch spiral shell concentrated after, enter cylinder and be dried, jet mill grinding, obtains the C finished product of starch of pre-gelatinization.
Add prozyme in C farinaceous size raw material by pentosanase, zytase and dextran carbohydrase by 6:3:1 composite the forming of weight part proportioning, its object is in order to reduce the viscosity of starch stoste equally.
The invention has the advantages that compared to the prior art, technique is simple, with horizontal screw machine, substitute a cluster cyclone in traditional technology, reduced energy consumption.For A starch, adopt rotary strainer or plansifter to reclaim gluten, screening effect and the quality of A starch have been improved, the separating factor of A starch has been brought up to more than 3000, reduced the residence time of material in equipment, reduced the factor that finished product of starch is turned sour, the impact of also having avoided temperature to raise on A starch quality simultaneously; For B starch, adopt the method for adding prozyme to reduce its serum viscosity using, improve the separation efficiency of B starch, and increased the recovery to A starch in B starch slurry, improved the yield of A starch; For C starch, improve interpolation prozyme and reduce its serum viscosity using, make it to improve after the sleeping spiral shell of bipyramid, reach better concentrated effect, meet the ingredient requirement of producing pre-gelatinization C starch in subsequent machining technology, the C finished product of starch of simultaneously pre-gelatinization can better be applied to food-processing, has improved its added value, and more easily preserves.
Embodiment
Below by specific embodiment, respectively screening and the process for refining of A starch, B starch and C starch are described in detail.
embodiment 1:
Screening and the process for refining of wheat A starch of the present invention comprise the steps:
The A farinaceous size raw material obtaining is first used to rotary strainer (or plansifter) filtration treatment of aperture 1mm from three-phase decanter, gluten in slurries raw material is filtered out, remaining slurries first sieve (as the model centrifugal screen that is ZXS-850) by first-stage centrifugal and sieve, its screen cloth is 250 orders, rotating speed 900r/min; Then screen overflow is pumped into secondary centrifugal screen (as the model centrifugal screen that is ZXS-850) and again sieve, the screen cloth of secondary centrifuging sieve is 200 orders, rotating speed 900r/min; After two-stage screening, collect the screen underflow of one-level, secondary centrifugal screen, after mixing, send into the sleeping spiral shell of one-level (as the model horizontal screw machine that is WL550) and carry out separating treatment, the light phase material such as the soluble protein obtaining, carbohydrate can otherwise processed (can be used as wastewater treatment according to treatment effect after collecting, also can be used as process water), the heavy phase starch obtaining enters mutually the sleeping spiral shell of secondary (as the model horizontal screw machine that is WL550) and concentrates, obtain heavy phase finished product farinaceous size, drying can obtain standard compliant A finished product of starch.
In this technique, screen out slurries after gluten and enter after by the screening of secondary centrifugal screen while processing in one-level horizontal screw centrifuge, its separating factor can reach more than 3000, and energy consumption has reduced by one times relatively.When concentrating with sleeping spiral shell, the time only needs 30 ~ 90s, and (a cluster cyclone needs 7min or longer time), the residence time shortens greatly, has reduced the factor of finished product of starch fermentation, the impact of also having avoided temperature to raise A starch quality is caused simultaneously.
embodiment 2:
Screening and the process for refining of B-Starch from Wheat of the present invention comprise the steps:
To in the B farinaceous size raw material obtaining from three-phase decanter, add by proteolytic enzyme and pentosanase by the composite prozyme forming of the weight part proportioning of 1:3 ~ 1:5, the add-on of prozyme is 1% ~ 3% of slurries raw material, during actual use, the add-on of prozyme can be adjusted according to the concentration of slurries raw material: when concentration is large, add-on can be more, and when concentration is low, add-on can be smaller; Prozyme can make the carbohydrate degraded in slurries raw material, destroys the combination of carbohydrate and albumen, and the viscosity of B farinaceous size is reduced, and is beneficial to the screening of subsequent technique; More than the B farinaceous size of processing through prozyme, first by first-stage centrifugal, sieve (as the model centrifugal screen that is ZXS-850) and sieve, its screen cloth is 250 orders, rotating speed 900r/min; Then screen overflow is pumped into secondary centrifugal screen (as the model centrifugal screen that is ZXS-850) and again sieve, the screen cloth of secondary centrifuging sieve is 200 orders, rotating speed 900r/min; After two-stage screening, can remove the fiber in starch, collect the screen underflow of one-level, secondary centrifugal screen and send into the sleeping spiral shell processing of one-level, it is concentrated that the sleeping spiral shell of one-level enters the sleeping spiral shell of secondary together with can then A starch isolation wherein being mixed with the heavy phase of the sleeping spiral shell of A starch one-level after out, improved the yield of A starch; And isolated light phase B farinaceous size directly enters the sleeping spiral shell of secondary and concentrates, obtain after drying standard compliant B finished product of starch.
embodiment 3:
Screening and the process for refining of wheat C starch of the present invention comprise the steps:
To in the C farinaceous size raw material obtaining from three-phase decanter, add by pentosanase, zytase and dextranase by the composite prozyme forming of the weight part proportioning of 6:3:1, the add-on of prozyme is 2% ~ 5% of slurries raw material; Equally, the add-on of prozyme can be adjusted according to the concentration of slurries raw material: when concentration is large, add-on can be more, and when concentration is low, add-on can be smaller; Prozyme can make the carbohydrate degraded in slurries raw material, and the viscosity of C farinaceous size is reduced, and is more beneficial to the screening of subsequent technique; Equally, fall C starch slurry after glutinous processing through two-stage screening process and enter the bipyramid spiral shell that crouches after (with embodiment 1 and 2) and concentrate, enter cylinder and be dried, jet mill grinding, can obtain the C finished product of starch of pre-gelatinization.
Claims (6)
1. the screening of wheat starch and a process for refining, is characterized in that: comprise the steps:
Farinaceous size raw material is sieved by first-stage centrifugal, screen overflow enters secondary centrifugal screen and sieves, the screen cloth of described first-stage centrifugal sieve is 250 orders, rotating speed 900r/min, the screen cloth of described secondary centrifugal screen is 200 orders, rotating speed 900r/min, collect the screen underflow of one-level, secondary centrifugal screen, send into the sleeping spiral shell of one-level and carry out separating treatment, the light phase material otherwise processed such as the soluble protein obtaining, carbohydrate, the starch obtaining enters mutually the sleeping spiral shell of secondary and concentrates, and obtains finished product farinaceous size, drying, can obtain standard compliant finished product of starch.
2. the screening of wheat starch according to claim 1 and process for refining, it is characterized in that: if farinaceous size raw material is A farinaceous size raw material, before entering first-stage centrifugal sieve, need to first pass through rotary strainer or plansifter filtration treatment, the screen-aperture of rotary strainer used or plansifter is 1mm, gluten in A starch slurry raw material is filtered out, and remaining slurries enter the processing that secondary centrifugal screen carries out subsequent handling again.
3. the screening of wheat starch according to claim 1 and process for refining, it is characterized in that: if farinaceous size raw material is B farinaceous size raw material,, before entering first-stage centrifugal sieve, need first in slurries raw material, to add prozyme, the add-on of prozyme is 1% ~ 3% of slurries raw material; Collect the screen underflow of one-level, secondary centrifugal screen and send into the sleeping spiral shell processing of one-level, the sleeping isolated heavy phase A farinaceous size of spiral shell of one-level is collected another use, and isolated light phase B farinaceous size directly enters the sleeping spiral shell of secondary and concentrates.
4. the screening of wheat starch according to claim 3 and process for refining, is characterized in that: described prozyme by proteolytic enzyme and pentosanase by composite the forming of weight part proportioning of 1:3 ~ 1:5.
5. the screening of wheat starch according to claim 1 and process for refining, it is characterized in that: if farinaceous size raw material is C farinaceous size raw material,, before entering first-stage centrifugal sieve, need first in slurries raw material, to add prozyme, the add-on of prozyme is 2% ~ 5% of slurries raw material; The C starch slurry obtaining by bipyramid crouch spiral shell concentrated after, enter cylinder and be dried, jet mill grinding, obtains the C finished product of starch of pre-gelatinization.
6. the screening of wheat starch according to claim 5 and process for refining, is characterized in that: described prozyme by pentosanase, zytase and dextranase by 6:3:1 composite the forming of weight part proportioning.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104642714A (en) * | 2015-02-08 | 2015-05-27 | 南通联海维景生物有限公司 | Method for producing wheat protein hydrolysate from wheat flour |
| CN105348394A (en) * | 2015-11-20 | 2016-02-24 | 江苏焦点农业科技有限公司 | Purifying method of corn starch 3-grade particles |
| CN105481986A (en) * | 2015-12-28 | 2016-04-13 | 河南飞天农业开发股份有限公司 | Production process of starch special for rice noodles |
| CN105481987A (en) * | 2015-12-28 | 2016-04-13 | 河南飞天农业开发股份有限公司 | Method for preparing pregelatinized starch from wheat B starch |
| CN106084073A (en) * | 2016-07-21 | 2016-11-09 | 内蒙古融成玉米开发有限公司 | Fiber treatment system in corn starch processing and process technique thereof |
| CN106810615A (en) * | 2016-12-22 | 2017-06-09 | 河南飞天农业开发股份有限公司 | A kind of preparation method of wheaten starch |
| CN107118281A (en) * | 2017-05-16 | 2017-09-01 | 润禾粉业南通有限公司 | A kind of wheaten starch preparation method |
| CN107927316A (en) * | 2017-11-16 | 2018-04-20 | 宁夏夏盛实业集团有限公司 | A kind of application of complex enzyme during three phase centrifugation method produces Gluten |
| CN110447755A (en) * | 2019-08-28 | 2019-11-15 | 宿州市皖神面制品有限公司 | A kind of separation method with wheaten starch and mucedin |
| CN112439538A (en) * | 2020-10-16 | 2021-03-05 | 中南林业科技大学 | Method for separating starch with different particle sizes |
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| CN101641018A (en) * | 2007-02-09 | 2010-02-03 | Gea韦斯伐里亚分离机有限公司 | Method for obtaining a valuable product, particularly starch, from grain flour |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104642714A (en) * | 2015-02-08 | 2015-05-27 | 南通联海维景生物有限公司 | Method for producing wheat protein hydrolysate from wheat flour |
| CN105348394A (en) * | 2015-11-20 | 2016-02-24 | 江苏焦点农业科技有限公司 | Purifying method of corn starch 3-grade particles |
| CN105481986B (en) * | 2015-12-28 | 2017-08-11 | 河南飞天农业开发股份有限公司 | A kind of starch specialized production technology of fried rice noodles |
| CN105481987A (en) * | 2015-12-28 | 2016-04-13 | 河南飞天农业开发股份有限公司 | Method for preparing pregelatinized starch from wheat B starch |
| CN105481986A (en) * | 2015-12-28 | 2016-04-13 | 河南飞天农业开发股份有限公司 | Production process of starch special for rice noodles |
| CN106084073A (en) * | 2016-07-21 | 2016-11-09 | 内蒙古融成玉米开发有限公司 | Fiber treatment system in corn starch processing and process technique thereof |
| CN106084073B (en) * | 2016-07-21 | 2019-04-16 | 内蒙古融成玉米开发有限公司 | Fiber treatment system and its treatment process in corn starch processing |
| CN106810615A (en) * | 2016-12-22 | 2017-06-09 | 河南飞天农业开发股份有限公司 | A kind of preparation method of wheaten starch |
| CN107118281A (en) * | 2017-05-16 | 2017-09-01 | 润禾粉业南通有限公司 | A kind of wheaten starch preparation method |
| CN107927316A (en) * | 2017-11-16 | 2018-04-20 | 宁夏夏盛实业集团有限公司 | A kind of application of complex enzyme during three phase centrifugation method produces Gluten |
| CN110447755A (en) * | 2019-08-28 | 2019-11-15 | 宿州市皖神面制品有限公司 | A kind of separation method with wheaten starch and mucedin |
| CN112439538A (en) * | 2020-10-16 | 2021-03-05 | 中南林业科技大学 | Method for separating starch with different particle sizes |
| CN112439538B (en) * | 2020-10-16 | 2022-08-05 | 中南林业科技大学 | Method for separating starch with different particle sizes |
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