Summary of the invention
The objective of the invention is to overcome traditional deficiency, provide that a kind of to have method simple, good decolorizing effect, the method that the employing ion exchange resin of low cost and other advantages decolours to glucose saccharifying liquid with absorbent charcoal fine purification saccharification liquid.
For achieving the above object, the present invention has adopted following technical scheme:
A kind of method that adopts ion exchange resin that glucose saccharifying liquid is decoloured, its technological process be,
A. glucose saccharifying liquid is handled, obtained dry-matter and be 35~45% glucose saccharifying liquid, be beneficial to ion exchange unit and reach the maximum adsorption effect;
B. with the gained glucose saccharifying liquid under 40 ℃~50 ℃ temperature, send into ion exchange unit with the 2.5-4.0BV/h flow and decolour, resin absorption amount maximum, best results under this flow; This temperature then helps resin performance adsorption effect, reduces the destruction to resin;
C. make finished product at purifying or after making with extra care.
Before glucose saccharifying liquid enters ion exchange unit, carry out activated carbon decolorizing among the described step b earlier, promptly use gac to decolour earlier with respect to saccharification liquid butt amount 0.5-1.5%.
Used ion-exchange unit is the positively charged ion and the anion-exchange resin column of serial connection among the described step b, calculating after wherein the resin Intake Quantity expands by resin is the 70-90% of column volume, yin and yang resin is just being washed backwash then earlier, using acid-base pretreatment again, then saccharification liquid is being decoloured.
Described step a comprises following technology
1) size mixing, in material-compound tank starch milk is transferred to 16-20Be, add the high temperature resistant α-Dian Fenmei of 0.45%-0.55%L/T butt, Jet liquefier is squeezed into pump in the back that stirs;
2) liquefaction, powder slurry and steam meet in Jet liquefier, and drop temperature is controlled at 95-110 ℃, and the feed liquid of coming out from injector enters the laminar flow jar after cooling, carry out second spraying, this sprays feed liquid and steam directly mixes, and temperature rises to more than 110 ℃, with the thorough deactivation of α-Dian Fenmei, then, feed liquid is cooled to 80-100 ℃ of insulation through the vacuum cooling system, cools to 40-65 ℃ under the qualified situation of iodine examination, simultaneously the liquid glucose pH value is transferred between the 3.5-6.5;
3) saccharification adds saccharifying enzyme, keeps saccharification about 45-60 hour, reach the saccharification terminal point after, rise to 70-90 ℃ with injector and reach the enzyme purpose of going out;
4) filter, the pH value of liquid glucose is transferred to 4.0~5.5 temperature be controlled between 60-80 ℃, remove by filter albumen through precoating formula vacuum-type drum filter.
Described step c comprises following technology
1) evaporation concentration, the liquid glucose after the decolouring is to be concentrated to 60-80% under the 60-90 ℃ of condition with the multiple-effect falling film vaporizer at vacuum tightness 0.5-1.1mpa and temperature;
2) crystallization, with pump liquid glucose is imported the multistage crystallization jar, in the one-level crystallizer, stirred 2 hours, after under the 40-50 ℃ of temperature crystallization 5-12 hour, inject secondary jar, three grades of jars, level Four jar etc. in order successively, quicken blowing with uniform flow stream continuously then, water coolant is cooled to the one-level crystallizer from final stage jar and material adverse current simultaneously, crystallizers at different levels are controlled differing temps respectively by crystallization curve and are made the liquid glucose state that constantly reaches capacity, glucose molecule is separated out on nucleus, crystallization reaches balance fully, surveys and can realize continuous blowing after mother liquid concentration reaches requirement;
3) separate, magma is separated mother liquor by separating machine;
4) drying, the wet sugar of finished product generates crystalline dextrose through airflow drying and cooling back.
Advantage of the present invention is:
1, resin has good selective adsorption to pigment, and pigment dissociates easily, and washing gets final product;
2, resin to the absorption of sugar seldom contains sugar below 8% in the elutriant;
3, the physical strength of resin is big, can be than big flow charging;
4, the graininess resin has certain clearance each other in resin column, so saccharification liquid can reduce resistance during by resin;
When 5, liquid glucose is by resin decolorization, can also play the ionic effect of taking off (being desalination), the electricity of saccharification liquid is led, and (ash content of finished product) reduces;
6, resin can reach the purpose of using repeatedly by regeneration, saves cost;
7, the resin expiration date long, the phase of abandoning that resin is general is (to be determined on a case-by-case basis) more than 1 year.
8, spent ion exchange resin is decoloured to saccharification liquid, decolorizing effect is better than the effect with activated carbon treatment slightly, and per ton cost can reduce about 8 yuan; In addition, use resin that liquid glucose is carried out exquisiteness after activated carbon decolorizing, the purity of glucose and quality will improve greatly.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
Employing ion-exchange resin decolorization glucose saccharifying liquid technology of the present invention is as follows:
1. size mixing, in material-compound tank starch milk is transferred to 16Be, add a certain amount of high temperature resistant α-Dian Fenmei, Jet liquefier is squeezed into pump in the back that stirs;
2. liquefaction, powder slurry and steam meet in Jet liquefier, and drop temperature is controlled at 95 ℃, and the feed liquid of coming out from injector enters the laminar flow jar after cooling, carry out second spraying.This sprays feed liquid and steam directly mixes, and temperature rises to more than 110 ℃, and with the thorough deactivation of α-Dian Fenmei, then, feed liquid is cooled to 80 ℃ of insulations through the vacuum cooling system.Under the qualified situation of iodine examination, cool to 40 ℃, simultaneously the liquid glucose pH value is transferred between 3.5;
3. saccharification adds saccharifying enzyme, keeps saccharification about 45-60 hour, reach the saccharification terminal point after, rise to 70 ℃ with injector and reach the enzyme purpose of going out;
4. filter, the pH value of liquid glucose is transferred to 4.0 temperature be controlled between 60 ℃, remove by filter albumen through precoating formula vacuum-type drum filter.
5. resin decolorization, at 40 ℃, concentration is 35% with the liquid glucose after filtering, flow velocity be 2.5BV/h down successively by polyphone positively charged ion and anion-exchange resin column, decolour, and the transmittance, the electricity that regularly detect effluent liquid are led;
6. evaporation concentration, the liquid glucose after the decolouring is concentrated to 60% with the multiple-effect falling film vaporizer under vacuum tightness 0.5mpa and 60 ℃ of conditions;
7. crystallization, with pump input multistage crystallization jar, in the one-level crystallizer, stirred about 2 hours, crystallization is after 5 hours under 40 ℃ of temperature, inject secondary jar, three grades of jars, level Four jar etc. in order successively, quicken blowing with uniform flow stream continuously then, water coolant is cooled to the one-level crystallizer from final stage jar and material adverse current simultaneously, crystallizers at different levels are controlled differing temps respectively by crystallization curve and are made the liquid glucose state that constantly reaches capacity, glucose molecule is separated out on nucleus, crystallization reaches balance fully, surveys and can realize continuous blowing after mother liquid concentration reaches requirement;
8. separate, magma is separated mother liquor by separating machine;
9. dry, the wet sugar of finished product generates crystalline dextrose through airflow drying and cooling back.
In the present embodiment, the resin Intake Quantity is the 70-90% (resin calculates after expanding) of column volume, and yin and yang resin is just being washed backwash then earlier, again with pre-treatment such as soda acids, then saccharification liquid is decoloured.Water content: 50-60%, wet volume density: 0.65-0.75g/ml, wet true density: 1.03-1.07g/ml, granularity: 〉=95 (0.315-1.250) %, mill back rate of small round spheres: 〉=97% (exquisiteness reaches more than 95% with resin).Decolouring back liquid glucose can reach transmittance 〉=98%, and electricity is led≤10 μ s/cm.
Embodiment 2:
Employing ion-exchange resin decolorization glucose saccharifying liquid technology of the present invention is as follows:
1. size mixing, in material-compound tank starch milk is transferred to 20Be, add a certain amount of high temperature resistant α-Dian Fenmei, Jet liquefier is squeezed into pump in the back that stirs;
2. liquefaction, powder slurry and steam meet in Jet liquefier, and drop temperature is controlled at 110 ℃, and the feed liquid of coming out from injector enters the laminar flow jar after cooling, carry out second spraying.This sprays feed liquid and steam directly mixes, and temperature rises to more than 110 ℃, and with the thorough deactivation of α-Dian Fenmei, then, feed liquid is cooled to 100 ℃ of insulations through the vacuum cooling system.Under the qualified situation of iodine examination, cool to 65 ℃, simultaneously the liquid glucose pH value is transferred between 6.5;
3. saccharification adds saccharifying enzyme, keeps saccharification about 45-60 hour, reach the saccharification terminal point after, rise to 90 ℃ with injector and reach the enzyme purpose of going out;
4. filter, the pH value of liquid glucose is transferred to 5.5 temperature be controlled between 80 ℃, remove by filter albumen through precoating formula vacuum-type drum filter.
5. resin decolorization, at 50 ℃, concentration is 45% with the liquid glucose after filtering, flow velocity be 4.0BV/h down successively by polyphone positively charged ion and anion-exchange resin column, decolour, and the transmittance, the electricity that regularly detect effluent liquid are led;
6. evaporation concentration, the liquid glucose after the decolouring is concentrated to 80% with the multiple-effect falling film vaporizer under vacuum tightness 1.1mpa and 90 ℃ of conditions of temperature;
7. crystallization, with pump input multistage crystallization jar, in the one-level crystallizer, stirred about 2 hours, 50 ℃ of following crystallizations of temperature are after 12 hours, inject secondary jar, three grades of jars, level Four jar etc. in order successively, quicken blowing with uniform flow stream continuously then, water coolant is cooled to the one-level crystallizer from final stage jar and material adverse current simultaneously, crystallizers at different levels are controlled differing temps respectively by crystallization curve and are made the liquid glucose state that constantly reaches capacity, glucose molecule is separated out on nucleus, crystallization reaches balance fully, surveys and can realize continuous blowing after mother liquid concentration reaches requirement;
8. separate, magma is separated mother liquor by separating machine;
9. dry, the wet sugar of finished product generates crystalline dextrose through airflow drying and cooling back.
In the present embodiment, the resin Intake Quantity is the 70-90% (resin calculates after expanding) of column volume, and yin and yang resin is just being washed backwash then earlier, again with pre-treatment such as soda acids, then saccharification liquid is decoloured.Water content: 50-60%, wet volume density: 0.65-0.75g/ml, wet true density: 1.03-1.07g/ml, granularity: 〉=95 (0.315-1.250) %, mill back rate of small round spheres: 〉=97% (exquisiteness reaches more than 95% with resin).Decolouring back liquid glucose can reach transmittance 〉=98%, and electricity is led≤10 μ s/cm.
Embodiment 3:
Employing ion-exchange resin decolorization glucose saccharifying liquid technology of the present invention is as follows:
1. size mixing, in material-compound tank starch milk is transferred to 18Be, add a certain amount of high temperature resistant α-Dian Fenmei, Jet liquefier is squeezed into pump in the back that stirs;
2. liquefaction, powder slurry and steam meet in Jet liquefier, and drop temperature is controlled at 107 ℃, and the feed liquid of coming out from injector enters the laminar flow jar after cooling, carry out second spraying.This sprays feed liquid and steam directly mixes, and temperature rises to more than 110 ℃, and with the thorough deactivation of α-Dian Fenmei, then, feed liquid is cooled to 90 ℃ of insulations through the vacuum cooling system.Under the qualified situation of iodine examination, cool to 60 ℃, simultaneously the liquid glucose pH value is transferred between 4.5;
3. saccharification adds saccharifying enzyme, keeps saccharification about 45-60 hour, reach the saccharification terminal point after, rise to 80 ℃ with injector and reach the enzyme purpose of going out;
4. filter, the pH value of liquid glucose is transferred to 5.0 temperature be controlled between 70 ℃, remove by filter albumen through precoating formula vacuum-type drum filter.
5. glucose saccharifying liquid carries out activated carbon decolorizing earlier before entering ion exchange unit, promptly uses the gac with respect to saccharification liquid butt amount 0.5% to carry out the decolorizing resin decolouring earlier.
6. the liquid glucose after will filtering is 45 ℃ in temperature, and concentration is 40%, flow velocity be 3.5BV/h down successively by polyphone positively charged ion and anion-exchange resin column, decolour, and the transmittance, the electricity that regularly detect effluent liquid are led;
7. evaporation concentration, the liquid glucose after the decolouring is concentrated to 75% with the multiple-effect falling film vaporizer under vacuum tightness 0.9mpa and 90 ℃ of conditions;
8. crystallization, with pump input multistage crystallization jar, in the one-level crystallizer, stirred about 2 hours, 44 ℃ of following crystallizations of temperature are after 12 hours, inject secondary jar, three grades of jars, level Four jar etc. in order successively, quicken blowing with uniform flow stream continuously then, water coolant is cooled to the one-level crystallizer from final stage jar and material adverse current simultaneously, crystallizers at different levels are controlled differing temps respectively by crystallization curve and are made the liquid glucose state that constantly reaches capacity, glucose molecule is separated out on nucleus, crystallization reaches balance fully, surveys and can realize continuous blowing after mother liquid concentration reaches requirement;
9. separate, magma is separated mother liquor by separating machine;
10. dry, the wet sugar of finished product generates crystalline dextrose through airflow drying and cooling back.
In the present embodiment, the resin Intake Quantity is the 70-90% (resin calculates after expanding) of column volume, and yin and yang resin is just being washed backwash then earlier, again with pre-treatment such as soda acids, then saccharification liquid is decoloured.Water content: 50-60%, wet volume density: 0.65-0.75g/ml, wet true density: 1.03-1.07g/ml, granularity: 〉=95 (0.315-1.250) %, mill back rate of small round spheres: 〉=97% (exquisiteness reaches more than 95% with resin).Decolouring back liquid glucose can reach transmittance 〉=98%, and electricity is led≤10 μ s/cm.
Embodiment 4:
In the 5th step of present embodiment, use gac to carry out the decolorizing resin decolouring earlier with respect to saccharification liquid butt amount 1.5%.All the other steps are identical with embodiment 3, repeat no more.
Embodiment 5:
In the 5th step of present embodiment, use gac to carry out the decolorizing resin decolouring earlier with respect to saccharification liquid butt amount 1%.All the other steps are identical with embodiment 3, repeat no more.