CN102021252A - Method and device for continuously hydrolyzing corn bran - Google Patents
Method and device for continuously hydrolyzing corn bran Download PDFInfo
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Abstract
The invention relates to a method and device for continuously hydrolyzing corn brans, belonging to the technical field of corn deep processing. The method comprises the following steps: (1) mixing the corn brans with hydrolytic acid, and pre-leaching for 5-10 minutes; (2) heating the material mixed and pre-leached in the step (1) to 115-125 DEG C, and hydrolyzing for 2.5-3.5 hours to obtain hydrolyzate; (3) cooling the hydrolyzate prepared in the step (2), and then separating the hydrolyzate from residues; and (4) when the component content in the hydrolyzate separated in the step (3) meets the requirement, exporting the hydrolyzate separated in the step (3), and carrying out sugar separation; when the component content in the hydrolyzate separated in the step (3) is lower than the required content, leading the hydrolyzate to enter the step (1) to mix with the corn brans, pre-leaching for 5-10 minutes, and recycling. By the method and equipment in the invention, the continuous hydrolysis of the corn brans is achieved, the yield equipment with the same scale has the advantages of low investment, high production efficiency and low energy consumption and is convenient for automatic operation, and the quality of the hydrolyzate is stable.
Description
Technical field
The present invention relates to a kind of maize peel continuous hydrolysis method and apparatus, belong to the corn deep processing technology field.
Background technology
Maize peel is the by product that W-Gum is produced, and its output generally reaches 12.5% of corn total amount, and the value of product is lower, sells mainly as feedstuff raw material.Maize peel contains abundant Mierocrystalline cellulose and hemicellulose, with acid is can obtain various carbohydrates after the catalyzer hydrolysis, comprises hexose and five-carbon sugar, wood sugar 30-35% wherein, the about 20-23% of pectinose, therefore glucose 20-26% can be used as the raw material of producing wood sugar and pectinose.
Wood sugar is extraordinary functional food additives, and after particularly further hydrogenation became Xylitol, purposes was more extensive.Pectinose is the same with wood sugar, all belongs to five-carbon sugar, and the sweet taste of similar sucrose is arranged, and pectinose is important medicine intermediate, can be used to medicine synthetic anticancer, antiviral and the treatment cardiovascular disorder.Compare with wood sugar, the physiological function that has as the pectinose of five-carbon sugar is more peculiar.International in recent years physiologist and nutritionist with regard to pectinose in enteron aisle to a series of further investigations of being used as of sugar metabolism, find that pectinose has remarkable blocking effect to the metabolic conversion of sucrose, make it good in the application prospect of aspects such as fat-reducing, control of diabetes.At present produce wood sugar, Xylitol is raw material with the corn cob, adopts the interrupter method hydrolysis, and then refining forming, but since the corn cob supply seasonal strong, and be difficult to store, corn cob in short supply restricted further developing of wood sugar, Xylitol enterprise.And maize peel is in liberal supply concerning corn deep processing enterprise, stable, particularly the content of pectinose is much higher than other raw materials after the maize peel hydrolysis, being the best raw material of producing pectinose, is that raw material production wood sugar and pectinose are the developing direction of maize peel deep processing from now on the maize peel therefore.
Method for hydrolysis and technology are to be one of gordian technique of raw material production wood sugar and pectinose with the maize peel, and hydrolysis process is directly connected to the yield of wood sugar and pectinose, and method for hydrolysis and device directly have influence on big production cost.The reactor intermittent hydrolysis is all adopted in China's corn cob hydrolysis at present, and production efficiency is low, energy consumption is high, and the quality instability, is not easy to automatization, stream line operation.The research of maize peel hydrolysis is just at the early-stage, also be to adopt batch technology and equipment, therefore the realization of maize peel continuous hydrolysis technology and device, can improve hydrolysis production efficiency, cut down the consumption of energy, improve the hydrolyzed solution quality, can realize simultaneously and back road screenings separation circuit operate continuously, to China is that raw material production wood sugar and pectinose have great importance with the maize peel, to corn cob method for hydrolysis and equipment important reference meanings being arranged also.
Publication number is the Chinese patent application of CN 101824055A, discloses the method that a kind of maize peel is the feedstock production L-arabinose, belongs to technical field of functional sugar.It comprises: boiling: the raw material maize peel is added the alkali lye boiling; Acid treatment:, collect hydrolyzed solution with the maize peel of oxalic acid treatment boiling; Neutralization: add calcium carbonate aqueous solution, neutralization, insulation, suction filtration, neutralizer.Decolouring:, get destainer with the neutralizer activated carbon decolorizing; Desalination removal of impurities: destainer through positively charged ion and anionite-exchange resin desalination removal of impurities, is once exchanged liquid; Concentrating under reduced pressure: will once exchange the liquid concentrating under reduced pressure, and get single vaporization liquid; Secondary decolourization: decolouring back suction filtration gets secondary decolourization liquid.Secondary desalination: secondary decolourization liquid through positively charged ion and anionite-exchange resin secondary desalination removal of impurities, is obtained secondary exchange liquid; Chromatographic separation: secondary is exchanged the liquid evaporation concentration, carry out chromatographic separation; Exchange liquid concentrating under reduced pressure with after the chromatographic separation is cooled to room temperature naturally; Centrifugal oven dry: centrifugal, oven dry gets the crystal pectinose.This technology is come hydrolysis by acid treatment again by after earlier material being heated up, and obtains hydrolyzed solution, belongs to intermittent hydrolysis technology, and not only energy consumption height, and hydrolyzed solution quality and production efficiency are all lower.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of maize peel continuous hydrolysis method and apparatus is provided.
A kind of maize peel continuous hydrolysis method may further comprise the steps:
(1) maize peel and hydrolysis acid is mixed, preimpregnation 5-10min;
(2) step (1) is mixed, after the material after the preimpregnation is heated to 115-125 ℃, hydrolysis 2.5-3.5h, hydrolyzed solution;
(3) after the hydrolyzed solution cooling that step (2) is made, separate hydrolyzed solution and material slag;
(4) when component content meets the requirements in the isolated hydrolyzed solution of step (3), hydrolyzed solution is derived, and carries out sugar from operation, when component content is lower than requirement in the isolated hydrolyzed solution of step (3), hydrolyzed solution enters step (1), mixes with maize peel, preimpregnation 5-10min, carries out cyclical operation.
Described hydrolysis acid is the sulfuric acid of 1.2-1.8% for concentration, and addition adds the hydrolysis acid of 8-10 unit weight for the per unit weight maize peel.
Preferably, sulfuric acid concentration is 1.5%, and addition adds the hydrolysis acid of 9 unit weights for the per unit weight maize peel.
Material type of heating in the described step (2) is for being the injection instantaneously heating of thermal source with steam.
Hydrolysis temperature in the described step (2) is 118 ℃, and hydrolysis time is 3h.
Hydrolyzed solution temperature reduction way in the described step (3) adopts the flash distillation cooling; The mode of separating hydrolyzed solution and material slag adopts the expeller squeezing to separate.
The specific equipment of above-mentioned maize peel continuous hydrolysis method, comprise the material feedway, mixing device, heating unit, hydrolysis reactor, heat sink, the screenings tripping device, it is characterized in that, the material feedway is connected with the opening for feed of mixing device, the discharge port of mixing device is connected with the opening for feed of heating unit, the discharge port of heating unit is connected with the opening for feed of hydrolysis reactor, the discharge port of hydrolysis reactor is connected with the opening for feed of heat sink, the discharge port of heat sink is connected with the opening for feed of screenings tripping device, and the grout outlet of screenings tripping device is connected with the opening for feed of outlet pipe and mixing device respectively.
Described material feedway comprises sulphuric acid soln storage tank, under meter, belt feeder, the diffusing shape solid flowmeter of impact type, the sulphuric acid soln storage tank is connected by pipeline with the liquid inlet opening of the diffusing shape solid flowmeter of impact type, pipeline is provided with under meter, the discharge port of belt feeder is connected with the solid materials opening for feed of the diffusing shape solid flowmeter of impact type, and the discharge port of the diffusing shape solid flowmeter of impact type is connected with the opening for feed of mixing device;
Described mixing device is a spiral mixing preimpregnation device.Be provided with the uniform pitch screw propulsion rod in this device, can satisfy mixing of materials preimpregnation time 5-10 minute requirement.
Described heating unit comprises surge tank, does not have the screenings of obstruction pump, vacuum breaker, injector, thermometer, surge tank stops up the screenings pump with nothing and is connected by pipeline, pipeline is provided with vacuum breaker, does not have the screenings of obstruction pump and is connected with injector by pipeline, and injector is provided with thermometer.Injector adopts the graduate HYZ type of Shanghai million light series high voltage steam injector.
Described screenings tripping device comprises that spiral extracts machine, hydrolyzed solution surge tank, acid proof pump, valve and under meter, the liquid discharge port that spiral is extracted machine is communicated with hydrolyzed solution surge tank opening for feed, hydrolyzed solution surge tank discharge port be connected by pipeline with the opening for feed of outlet pipe and mixing device respectively, this pipeline is provided with acid proof pump, valve and under meter.Spiral is extracted machine be used to the to be hydrolyzed screenings of material and is separated, and spiral is extracted the screw propulsion rod that varying pitch is housed in the machine.
Tensimeter and thermometer are arranged on the described hydrolysis reactor, this hydrolysis reactor has pot type and 2 kinds of structure formations of tubular type, adopt the tank reactor tank diameter at 0.5-1.5m, adopt the tangential feeding mode of low in and high out, the material that is introduced into reactor is come out earlier, all reach requirement to guarantee the reaction times.Tank body quantity (length of pipeline) that reactor is included and volume energy satisfy and got final product in reaction times 2.5-3.5 hour.
Described heat sink is a flash tank, and its top is divided into right cylinder, and the bottom is a cone, takes the mode of tangential feeding on cylinder top; This feeding manner can prolong evaporation time and increase evaporation area.
The contact surface of contact acid solution or acid materials device is all selected stainless steel 316L for use in aforesaid device, or carries out enamel anticorrosion and handle.
Maize peel continuous hydrolysis method and apparatus provided by the invention also is applicable to biomass materials such as corn cob through pulverizing, bagasse, stalk except that being applicable to maize peel, to different materials, hydrolysis process needs suitably to adjust.
The present invention compared with prior art has the following advantages:
1, realized the serialization of maize peel hydrolysis, the output facility investment of equal scale is few, the production efficiency height, and energy consumption is low.
2, be convenient to automated operation, reduce labour intensity, the hydrolyzed solution quality is more stable simultaneously.
3, adopted the mode of vapo(u)r blasting heating, realized instantaneously heating to hydrolysis temperature, the efficient height, energy-conservation.
4, separate the backflow of posthydrolysis liquid by screenings, realize the hydrolysis of circulation once more of hydrolyzed solution, improve the concentration of hydrolyzed solution, reduce follow-up refining and evaporation expense greatly, compare, reduced facility investment with the intermittent hydrolysis method and apparatus, production efficiency improves greatly, help the linking with later process simultaneously, realize continuous production, for being that the industrializing implementation of raw material production wood sugar and pectinose has been laid good basis with the maize peel.
Description of drawings
Fig. 1 is a maize peel continuous hydrolysis device synoptic diagram;
Wherein: 1, acid solution storage tank, 2, valve, 3, under meter, 4, belt feeder, 5, the impact type shape solid flowmeter that looses, 6, spiral mixing preimpregnation device, 7, surge tank, 8, do not have to stop up the screenings pump, 9, vacuum breaker, 10, magnetic flow meter, 11, injector, 12, thermometer, 13, tensimeter, 14, hydrolysis reactor, 15, flash tank, 16, spiral is extracted machine, and 17, the hydrolyzed solution surge tank, 18, acid proof pump.
Embodiment
The present invention will be further described below in conjunction with Figure of description and embodiment.
A kind of maize peel continuous hydrolysis method may further comprise the steps:
(1) be that 1.5% sulfuric acid mixes, preimpregnation 10min with maize peel and concentration, the sulfuric acid addition adds the sulfuric acid of 9 unit weights for the per unit weight maize peel;
(2) step (1) is mixed, to adopt steam be after the injection instantaneously heating mode of thermal source is heated to 118 ℃ to the material after the preimpregnation, hydrolysis 3h, hydrolyzed solution;
(3) hydrolyzed solution that step (2) is made adopts the flash distillation cooling method to reduce to 80-85 ℃, adopts the expeller squeezing to separate hydrolyzed solution and material slag;
After testing, hydrolyzed solution solid content 9.3%, main component is as follows:
Hydrochlorate 31.24%, glucose 19.53%, wood sugar 29.62%, pectinose 16.32%, surplus impurity.
Hydrolyzed solution and the maize peel that embodiment 1 is made mixed by weight 1: 9, preimpregnation 10min, repeated the operation of embodiment 1 step (2) and step (3).
After testing, hydrolyzed solution solid substance thing content 17.1%, main component is as follows:
Hydrochlorate 25.03%, glucose 20.92%, wood sugar 31.79%, pectinose 19.96%, surplus impurity.
After the circulation hydrolysis, solid content improves nearly one times, and the ratio of sugar component is constant substantially, has saved vitriolic consumption and energy consumption.
The specific equipment of above-mentioned maize peel continuous hydrolysis method, as shown in Figure 1, comprise the material feedway, mixing device, heating unit, hydrolysis reactor, heat sink, the screenings tripping device, the material feedway is connected with the opening for feed of mixing device, the discharge port of mixing device is connected with the opening for feed of heating unit, the discharge port of heating unit is connected with the opening for feed of hydrolysis reactor, the discharge port of hydrolysis reactor is connected with the opening for feed of heat sink, the discharge port of heat sink is connected with the opening for feed of screenings tripping device, and the grout outlet of screenings tripping device is connected with the opening for feed of outlet pipe and mixing device respectively.
Above-mentioned material feedway comprises acid solution storage tank 1, under meter 3, belt feeder 4, the diffusing shape solid flowmeter 5 of impact type, acid solution storage tank 1 is connected by pipeline with the liquid inlet opening of the diffusing shape solid flowmeter 5 of impact type, pipeline is provided with under meter 3, the discharge port of belt feeder 4 is connected with the solid materials opening for feed of the diffusing shape solid flowmeter 5 of impact type, and the discharge port of the diffusing shape solid flowmeter 5 of impact type is connected with the opening for feed of mixing device;
Above-mentioned mixing device is a spiral mixing preimpregnation device 6.Be provided with the uniform pitch screw propulsion rod in this device, can satisfy mixing of materials preimpregnation time 5-10 minute requirement.
Above-mentioned heating unit comprises surge tank 7, does not have the screenings of obstruction pump 8, vacuum breaker 9, injector 11, thermometer 12, surge tank 7 with do not have to stop up screenings pump 8 and be connected by pipeline, pipeline is provided with vacuum breaker 9, do not have the screenings of obstruction pump 8 and be connected with injector 11 by pipeline, injector 11 is provided with thermometer 12.Injector 11 is HZY-5 type injectors that Shanghai million smooth research institute company limiteds produce.
Above-mentioned screenings tripping device comprises that spiral extracts machine 16, hydrolyzed solution surge tank 17, acid proof pump 18, valve 2 and under meter 3, the liquid discharge port that spiral is extracted machine 16 is communicated with hydrolyzed solution surge tank 17 opening for feeds, hydrolyzed solution surge tank 17 discharge ports be connected by pipeline with the opening for feed of outlet pipe and mixing device respectively, this pipeline is provided with acid proof pump 18, valve 5 and under meter 3.Spiral is extracted machine 16 be used to the to be hydrolyzed screenings of material and is separated, and spiral is extracted the screw propulsion rod that varying pitch is housed in the machine 16.
Above-mentioned heat sink is a flash tank 15, and its top is divided into right cylinder, and the bottom is a cone, takes the mode of tangential feeding on cylinder top; This feeding manner can prolong evaporation time and increase evaporation area.
Under meter in the present embodiment preferentially adopts the acid proof magnetic flow meter, with transmission and the control automatically that makes things convenient for signal; The belt feeder motor adopts variable frequency control, with convenient control material addition.The contact surface material of the equipment of all contact acid solutions or acid material is selected stainless steel 316L for use.
With dried maize peel material is example, maize peel enters Flow Meter for Solid Materials 5 by belt feeder 4 and carries out flow metering, rotating speed by the control belt feeder carries out flow control, the 1.2-1.8% sulphuric acid soln of acid solution storage tank 1 the inside enters spiral mixing preimpregnation device simultaneously by valve 2 and under meter 3 with from the maize peel that Flow Meter for Solid Materials 5 is come out, by the flow of liquor ratio control in 1: 8 maize peel and acid solution, mix preimpregnation time maintenance 10min.
Material after the preimpregnation enters surge tank 7, do not squeeze into injector 11 by there being the screenings of obstruction pump 8 then, realize under the vapor action that enters at the same time that instantaneously heating is to hydrolysis temperature 115-125 ℃, steam is controlled by valve 2, on the feeding pipe of injector, be equipped with vacuum breaker 9, there be valve 2 and under meter 10 to realize flow control and meterings simultaneously, be provided with thermometer 12, carry out temperature survey at the lower part outlet of injector.
The material that comes out from the injector bottom enters hydrolysis reactor 14 reactions 3.5 hours from bottom tangent.Hydrolysis reactor 14 is made up of 4 tank bodies, and the valve 2 that is equipped with tensimeter 13, thermometer 12 and keeps pressure, enter flash tank 15 after hydrolysis is finished and carry out the flash distillation cooling, adopt spiral to extract machine 16 then and carry out the screenings separation, hydrolyzed solution enters hydrolyzed solution surge tank 17, the mixing preimpregnation device of being squeezed into next procedure or being back to leading portion by acid proof pump 18 hydrolysis that circulates to improve hydrolyzed solution concentration, is equipped with valve 2 and under meter 3 is used for flow control and metering on the discharging pipeline of pump.
Maize peel continuous hydrolysis method and apparatus provided by the invention is except that being applicable to maize peel, also be applicable to biomass materials such as corn cob through pulverizing, bagasse, stalk, to different materials, the hydrolysis process parameter needs suitably to adjust, to reach best hydrolysis effect.
More than describing in detail is at the specifying of possible embodiments of the present invention, and this embodiment is not in order to limiting claim of the present invention, and the equivalence that all the present invention of disengaging do is implemented or change, all should be contained in the claim of the present invention.
Claims (10)
1. a maize peel continuous hydrolysis method is characterized in that, may further comprise the steps:
(1) maize peel and hydrolysis acid is mixed, preimpregnation 5-10min;
(2) step (1) is mixed, after the material after the preimpregnation is heated to 115-125 ℃, hydrolysis 2.5-3.5h, hydrolyzed solution;
(3) after the hydrolyzed solution cooling that step (2) is made, separate hydrolyzed solution and material slag;
(4) when component content meets the requirements in the isolated hydrolyzed solution of step (3), hydrolyzed solution is derived, and carries out sugar from operation, when component content is lower than requirement in the isolated hydrolyzed solution of step (3), hydrolyzed solution enters step (1), mixes with maize peel, preimpregnation 5-10min, carries out cyclical operation.
2. method for hydrolysis as claimed in claim 1 is characterized in that, described hydrolysis acid is the sulfuric acid of 1.2-1.8% for concentration, and addition adds the hydrolysis acid of 8-10 unit weight for the per unit weight maize peel.
3. method for hydrolysis as claimed in claim 2 is characterized in that, sulfuric acid concentration is 1.5%, and addition adds the hydrolysis acid of 9 unit weights for the per unit weight maize peel.
4. method for hydrolysis as claimed in claim 1 is characterized in that, the material type of heating in the described step (2) is for being the injection instantaneously heating of thermal source with steam.
5. method for hydrolysis as claimed in claim 1 is characterized in that, the hydrolysis temperature in the described step (2) is 118 ℃, and hydrolysis time is 3h.
6. method for hydrolysis as claimed in claim 1 is characterized in that, the hydrolyzed solution temperature reduction way in the described step (3) adopts the flash distillation cooling; The mode of separating hydrolyzed solution and material slag adopts the expeller squeezing to separate.
7. the specific equipment of the described maize peel continuous hydrolysis of claim 1 method, comprise the material feedway, mixing device, heating unit, hydrolysis reactor, heat sink, the screenings tripping device, it is characterized in that, the material feedway is connected with the opening for feed of mixing device, the discharge port of mixing device is connected with the opening for feed of heating unit, the discharge port of heating unit is connected with the opening for feed of hydrolysis reactor, the discharge port of hydrolysis reactor is connected with the opening for feed of heat sink, the discharge port of heat sink is connected with the opening for feed of screenings tripping device, and the grout outlet of screenings tripping device is connected with the opening for feed of outlet pipe and mixing device respectively.
8. described specific equipment as claimed in claim 7, it is characterized in that, the material feedway comprises sulphuric acid soln storage tank, under meter, belt feeder, the diffusing shape solid flowmeter of impact type, the sulphuric acid soln storage tank is connected by pipeline with the liquid inlet opening of the diffusing shape solid flowmeter of impact type, pipeline is provided with under meter, the discharge port of belt feeder is connected with the solid materials opening for feed of the diffusing shape solid flowmeter of impact type, and the discharge port of the diffusing shape solid flowmeter of impact type is connected with the opening for feed of mixing device.
9. described specific equipment as claimed in claim 7 is characterized in that, described mixing device is a spiral mixing preimpregnation device;
Preferably, described heating unit comprises surge tank, does not have the screenings of obstruction pump, vacuum breaker, injector, thermometer, surge tank stops up the screenings pump with nothing and is connected by pipeline, pipeline is provided with vacuum breaker, do not have the screenings of obstruction pump and be connected with injector by pipeline, injector is provided with thermometer.
10. described specific equipment as claimed in claim 7, it is characterized in that, described screenings tripping device comprises that spiral extracts machine, hydrolyzed solution surge tank, acid proof pump, valve and under meter, the liquid discharge port that spiral is extracted machine is communicated with hydrolyzed solution surge tank opening for feed, hydrolyzed solution surge tank discharge port be connected by pipeline with the opening for feed of outlet pipe and mixing device respectively, this pipeline is provided with acid proof pump, valve and under meter.
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| CN102391065A (en) * | 2011-08-09 | 2012-03-28 | 山东省鲁洲食品集团有限公司 | Method for producing dihydric alcohol and low molecular polyalcohol by taking corn husk as raw material |
| CN102391065B (en) * | 2011-08-09 | 2014-02-05 | 山东省鲁洲食品集团有限公司 | Method for producing dihydric alcohol and low molecular polyalcohol by taking corn husk as raw material |
| CN104719627A (en) * | 2015-04-13 | 2015-06-24 | 山东省鲁洲食品集团有限公司 | Method for processing corn steep liquor/dry powder capable of being directly fed to livestock |
| CN104719627B (en) * | 2015-04-13 | 2018-01-19 | 山东省鲁洲食品集团有限公司 | It is a kind of can Direct-fed livestock and poultry corn steep liquor/dry powder processing method |
| CN107419035A (en) * | 2015-09-14 | 2017-12-01 | 山东富欣生物科技股份有限公司 | A kind of method that high-purity L arabinoses are prepared using maize peel as raw material continuously cooking |
| CN107447059A (en) * | 2016-05-31 | 2017-12-08 | 中国科学院大连化学物理研究所 | A kind of biomass by hydrolyzation produces xylose mother liquid and residue compression forming integral method |
| CN107447057A (en) * | 2016-05-31 | 2017-12-08 | 中国科学院大连化学物理研究所 | A kind of biomass continuous hydrolysis and the device of compression forming |
| WO2020114284A1 (en) * | 2018-12-04 | 2020-06-11 | 浙江华康药业股份有限公司 | System and method for continuously hydrolyzing hemicellulose to prepare xylose solution |
| CN114959263A (en) * | 2022-04-28 | 2022-08-30 | 北京科技大学 | Device and method for strengthening bioleaching by using acid to treat straws |
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| CN102021252B (en) | 2013-02-27 |
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