CN105063247A - Sugar making process for refining cane mixed juice by use of multi-stage membrane filtration technology - Google Patents
Sugar making process for refining cane mixed juice by use of multi-stage membrane filtration technology Download PDFInfo
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Abstract
The present invention relates to a sugar making process for refining cane mixed juice by use of a membrane separation technology. The process comprises: heating cane mixed juice; adding an alkaline substance into the heated cane mixed juice to regulate the pH value;separating suspended impurities such as bagasse and the like from the cane mixed juice; collecting a separated liquid phase; removing suspended impurities with small particle sizes, macromolecules, colloids and the like through filtration of a microfiltration membrane; putting the collected filtrate into an ultrafiltration membrane with the molecular weight cutoff greater than that of sucrose; removing pigments and non-sugar substances with molecular weight greater than that of sucrose; using a nanofiltration membrane with the molecular weight cutoff less than that of sucrose molecules to concentrate a decolorized clear liquid; and removing inorganic salts with molecular weight less than that of the sucrose, monosaccharide and the like by virtue of the nanofiltration membrane. Compared with the traditional process, the process provided by the present invention is capable of greatly reducing the chroma and turbidity of the sugar juice, greatly reducing the content of nonsugar macromolecular substance in the sugar juice, and increasing the purity and yield of sucrose, and is free of clarifying agents such as lime and the like in the main process.
Description
Technical field
The invention belongs to refined sugar technical field, specifically a kind of technique utilizing the refined sugar of Using Multistage Membranes filtering technique process Cane Mixed Juice.
Background technology
At present, domestic cane sugar manufacture production technique mainly contains lime method, sulfurous method and carbonatation process according to the difference of clarification process, and the clarifying treatment step in aforesaid method mainly contains three processes: heating sugarcane juice, interpolation finings, precipitation separation.Aforesaid method utilizes finings to remove the impurity such as the non-sugar ingredient in initial syrup, reduce colourity and the turbidity of syrup, but aforesaid method ubiquity complex process, percent of decolourization are low, non-sugar ingredient clearance is low, finings consumption large, affect the problems such as mouthfeel simultaneously.Syrup is generally carried out high temperature through multiple-effect evaporation step and is concentrated by the syrup through clarification, and due to high temperature concentration process, make sucrose occur to transform Sum decomposition, product colourity increases, and also there is the problems such as the observable index of evaporative phase-change is higher simultaneously.
CN103725802A discloses the refining technique of a kind of sucrose, and concrete steps comprise sucrose and squeeze the juice, pre-treatment, membrane microfiltration, pre-concentration, ion-exchange decolouring, desalination, MVR (mechanical vapor recompression technology) evaporation concentration, crystallization, centrifugation, drying and other steps, obtains crystallization of sucrose.Advantage is: substituted for sheet frame and lime precipitation step with ceramic micro filter, saves ultrafiltration operation section; With membrane concentration, reduce the steam output of evaporation concentration equipment, reduce energy consumption, eliminate a part of inorganic salt; Instead of stove drying technique with ion-exchange decolouring impurity removal process, solve the sulphur residue problem in sucrose, improve quality product; Use ion-exchange desalination, effectively remove the salinity in sucrose mix juice; Adopt MVR evaporation concentration, have fall reduce energy consumption; Adopt membrane concentration, separation and ion-exchange unit, reduce the floor space of equipment, reduce initial cost.Although above-mentioned patent employs the technology such as membrane microfiltration, ion-exchange, MVR, these improvement still do not solve the problems such as impurities removing efficiency is low, percent of decolourization is low, non-sugar ingredient clearance is low.
Summary of the invention
The object of the present invention is to provide a kind of sugar refining technology utilizing Using Multistage Membranes isolation technique to refine Cane Mixed Juice, technique of the present invention is relative to the sugar production process of routine and the technique improved by new separation technology (as common membrane filtration, ion-exchange etc.), can the colourimetric number of more effective reduction product and turbidity value, simplify the operation of decolouring removal of impurities, reduce the cost of decolouring clarification removal of impurities; Simultaneously relative to the method for single employing membrane process decolouring, sucrose purity and the concentration of syrup can be improved; Preferably, by the recycle of different steps filter residue or raffinate, reduce the sucrose loss of whole technique, improve the rate of recovery of sucrose.
The invention provides a kind of sugar refining technology utilizing Using Multistage Membranes isolation technique to refine Cane Mixed Juice, comprise the following steps:
1), Cane Mixed Juice is heated;
2), in the Cane Mixed Juice of heating, alkaline matter adjust ph is added;
3), to the Cane Mixed Juice regulating pH value carry out pre-treatment, described pre-treatment object removes the impurity suspended in Cane Mixed Juice, obtains filtered liquid A;
4), by described filtered liquid A utilize microfiltration membrane technology to carry out secondary filtration, object removes wherein remaining suspended impurity, macromolecular substance, colloid, obtains filtered liquid B;
5), by described filtered liquid B utilize ultrafiltration membrane technique to refilter, described ultra-filtration membrane is greater than the material of sucrose by molecular weight cut-off, removes pigment and is greater than the nonsugar of sucrose, obtain filtered liquid C;
6), by described filtered liquid C utilize Nanofiltration-membrane technique to refilter, described nanofiltration membrane is greater than sucrose molecule by retaining sucrose molecules and molecular weight concentrates described filtered liquid C, removes molecular weight and is less than sucrose material, obtain concentrated solution;
7), by described concentrated solution entering thickener continues concentrated, and be concentrated to saturation concentration, decrease temperature crystalline, centrifugal solid-liquid obtains crystallised sugar product after being separated
Preferably, described pre-treatment is optionally filtered or sock filtration for centrifuging, video disc, is preferably centrifuging.
Preferably, in described microfiltration membrane technology, the micro-filtration membrane module of employing is optionally tubular module, wound module, hollow fiber form assembly and flat plate module, and the pore diameter range of described microfiltration membrane is 0.1-0.8 micron, the service temperature of microfiltration process is 60-95 DEG C, working pressure 0.01-0.4MPa.
Preferably, described hyperfiltration membrane assembly is optionally wound module, tubular module, hollow fiber form assembly and flat plate module, and the molecular weight cut-off of described ultra-filtration membrane is 1000-5000Da, preferred 1000Da, the service temperature of ultra-filtration process is 60-95 DEG C, working pressure 1.0-1.5MPa.
Preferably, described nanofiltration membrane component is wound module, and described nanofiltration membrane molecular weight cut-off is 90-400Da, preferred 200Da, and the service temperature of nanofiltration process is 60-95 DEG C, working pressure 2.0-4.0MPa.
Preferably, the temperature of described Cane Mixed Juice heating is 60-95 DEG C, and described alkaline matter is sodium hydroxide or calcium hydroxide, preferred sodium hydroxide, and pH value is 6.8-7.5.
Preferably, the high-concentration and high-chromaticity raffinate also comprised ultra-filtration process produces carries out desolventing technology, comprise the following steps: after interpolation lime, interpolation sulfurous gas, interpolation carbonic acid gas, phosphoric acid carry out chemical treatment, then remove suspended matter through sedimentation filtration process.
Preferably, described technique optionally also comprises step 3) preprocessing process produce residue and raffinate turn back to extracting sugarcane juice workshop section; And/or
By step 4) microfiltration process produce high-concentration suspension dirt solution turn back to step 3) carry out preprocessing process; And/or
By step 5) ultra-filtration process produce high-concentration and high-chromaticity raffinate after desolventing technology, turn back to step 4) carry out microfiltration process; And/or
Using step 6) nanofiltration process produce permeate turn back to washing room of squeezing the juice as bath water.
Preferably, described separatory membranes at different levels, all select resistant to elevated temperatures organic membrane.
A kind of novel process utilizing the Cane Mixed Juice of membrane process to refine sugaring provided by the invention, compared with conventional sugarcane treating process and existing development, has following outstanding characteristics and advantages:
1. technique of the present invention adopts the integrated filtering technique of Using Multistage Membranes of micro-filtration-ultrafiltration-nanofiltration to replace original mixed juice precipitation clarifying process, significantly can reduce the colourity of syrup and the content of turbidity and non-saccharide macromolecular substance, improve the purity of sucrose, improve the yield of sucrose.
2. adopt cheap, the decolorization that sucrose mixes juice is carried out closer to organic ultra-filtration membrane of sucrose in aperture, and cost is lower, and percent of decolourization is higher, decreases the interpolation of the finingss such as lime simultaneously, makes products obtained therefrom have better mouthfeel.
3. adopt nanofiltration membrane to concentrate the clear juice liquid glucose after decolouring clarification, the small-molecule substance in liquid glucose can be removed, reduce ash content, simultaneously without the membrane concentration dehydration of phase transformation relative to Multi-effect Evaporation Processes, greatly can save the dehydration energy of liquid glucose.
4. technique of the present invention is by the process of decolouring raffinate and the recovery of sugar composition of wherein carrying secretly, and the decolouring raffinate etc. as film decolorization can effectively reduce the sucrose loss of whole technique, improves the yield of sucrose.
Accompanying drawing explanation
Fig. 1. one utilizes Using Multistage Membranes filtering technique to refine Cane Mixed Juice sugar refining technology schematic diagram
Embodiment
Below in conjunction with embodiment, the present invention will be further described.Theme protection domain involved in the present invention is not limited only to these embodiments.
Embodiment 1:
1), 200kg Cane Mixed Juice raw material, enter heat-exchange equipment, by low temperature exhaust heat steam or hot water heating to about 60 DEG C;
2), with sodium hydroxide regulate pH to 7, remove suspended particle through the non-woven fabrics sock filtration of 5 microns, obtain filtered liquid A;
3) tube type filter membrance assembly is entered after, described filtered liquid A being pressurized to 0.1MPa, select organic microfiltration membrane of 0.2 micron in membrane module, under pressure-driven, remaining suspension particle, macromolecular substance, colloid etc. in described filtered liquid A are retained, sucrose completely through, obtain filtered liquid B;
4), described filtered liquid B is continued heating and maintain 60 DEG C, be pressurized to 1.0MPa and enter spiral wound membrane module, organic ultra-filtration membrane of molecular weight cut-off 3000Da is selected in membrane module, under pressure-driven, remaining suspension particle, macromolecular substance, colloid, dextran, starch etc. in described filtered liquid B obtain some or all of retaining, the sucrose being less than retaining molecular weight obtain completely through, obtain filtered liquid C, analytical results shows, through ultra-filtration membrane, the colourity of clear juice reduces 70%;
5), the described filtered liquid C after decolouring is pressurized to 2.5MPa and enters rolling nanofiltration membrane component, the organic nanofiltration membrane of molecular weight cut-off 200Da is selected in membrane module, under pressure-driven, moisture and small molecular organic acid, salt grade through nanofiltration membrane, sucrose is retained completely and is realized concentrated, obtains concentrated solution;
6), the described concentrated solution that obtains after concentrating of nanofiltration, the relative concentration of sucrose improves 50% in the peace and quiet clear juice obtained of ordinary chemical method, and purity improves 5.6%.Embodiment result shows, technique of the present invention can effectively reduce the colourity of syrup, improves purity and the concentration of sucrose;
7), by described concentrated solution entering thickener continues concentrated, and be concentrated to saturation concentration, decrease temperature crystalline, centrifugal solid-liquid obtains crystallised sugar product after being separated.
Embodiment 2:
1), 200kg Cane Mixed Juice raw material, enter heat-exchange equipment, by low temperature exhaust heat steam or hot water heating to 65 DEG C;
2), with calcium hydroxide regulate pH to 8, remove suspended particle through the whizzer of 4000 revs/min, obtain filtered liquid A;
3) hollow fiber microfiltration membrane assembly is entered after, described filtered liquid A being pressurized to 0.05MPa, the organic hollow fiber microfiltration membrane of 0.1 micron is selected in membrane module, under pressure-driven, remaining suspension particle, macromolecular substance, colloid etc. in described filtered liquid A are retained, sucrose obtain completely through, obtain filtered liquid B;
4), described filtered liquid B is continued to be heated to about 65 DEG C, be pressurized to 1.0MPa and enter spiral wound membrane module, organic ultra-filtration membrane of molecular weight cut-off 2000Da is selected in membrane module, under pressure-driven, remaining suspension particle, macromolecular colloid, dextran, starch etc. in described filtered liquid B obtain some or all of retaining, the sucrose being less than retaining molecular weight obtain completely through, obtain filtered liquid C, analytical results shows, through ultra-filtration membrane, the colourity of clear juice reduces 75%;
5), the described filtered liquid C after decolouring is pressurized to 2.5MPa and enters rolling nanofiltration membrane component, the organic nanofiltration membrane of molecular weight cut-off 400Da is selected in membrane module, under pressure-driven, moisture and small molecular organic acid, salt grade through nanofiltration membrane, sucrose is retained completely and is realized concentrated, obtains concentrated solution;
6), the described concentrated solution that obtains after concentrating of nanofiltration, the relative concentration of sucrose improves 48% in the peace and quiet clear juice obtained of ordinary chemical method, and purity improves 5.8%.Embodiment result shows, technique of the present invention can effectively reduce the colourity of syrup, improves purity and the concentration of sucrose;
7), by described concentrated solution entering thickener continues concentrated, and be concentrated to saturation concentration, decrease temperature crystalline, centrifugal solid-liquid obtains crystallised sugar product after being separated.
Embodiment 3:
1), 200kg Cane Mixed Juice raw material, enter heat-exchange equipment, by low temperature exhaust heat steam or hot water heating to 70 DEG C;
2), add alkali adjust ph to 7.5, remove suspended particle through the whizzer of 4000 revs/min, obtain filtered liquid A;
3), described filtered liquid A is pressurized to 0.05MPa and enters hollow fiber microfiltration membrane assembly, the organic hollow fiber microfiltration membrane of 0.1 micron is selected in membrane module, under pressure-driven, remaining suspension particle, macromolecular substance, colloid etc. in described filtered liquid A are retained, sucrose obtain completely through, obtain filtered liquid B;
4), described filtered liquid B is continued to be heated to about 70 DEG C, be pressurized to 1.0MPa and enter spiral wound membrane module, organic ultra-filtration membrane of molecular weight cut-off 1000Da is selected in membrane module, under pressure-driven, remaining suspension particle, macromolecular colloid, dextran, starch etc. in described filtered liquid B obtain some or all of retaining, the sucrose being less than retaining molecular weight obtain completely through, obtain filtered liquid C, analytical results shows, through ultra-filtration membrane, the colourity of clear juice reduces 78%;
5), the described filtered liquid C after decolouring is pressurized to 2.5MPa and enters rolling nanofiltration membrane component, the organic nanofiltration membrane of molecular weight cut-off 600Da is selected in membrane module, under pressure-driven, moisture and small molecular organic acid, salt grade through nanofiltration membrane, sucrose is retained completely and is realized concentrated, obtains concentrated solution;
6), the described concentrated solution that obtains after concentrating of nanofiltration, the relative concentration of sucrose improves 47% in the peace and quiet clear juice obtained of ordinary chemical method, and purity improves 5.2%.Embodiment result shows, novel process can effectively reduce the colourity of syrup, improves purity and the concentration of sucrose.
7), by described concentrated solution entering thickener continues concentrated, and be concentrated to saturation concentration, decrease temperature crystalline, centrifugal solid-liquid obtains crystallised sugar product after being separated.
Embodiment 4:
1), 200kg Cane Mixed Juice raw material, enter heat-exchange equipment, by low temperature exhaust heat steam or hot water heating to 65 DEG C;
2), add alkali adjust ph to 7.5, remove suspended particle through the whizzer of 4000 revs/min, obtain filtered liquid A;
3), described filtered liquid A is pressurized to 0.05MPa and enters hollow fiber microfiltration membrane assembly, the organic hollow fiber microfiltration membrane of 0.22 micron is selected in membrane module, under pressure-driven, remaining suspension particle, macromolecular substance, colloid etc. in mixed juice are retained, sucrose obtain completely through, obtain filtered liquid B;
4), described filtered liquid B is continued to be heated to about 60 DEG C, be pressurized to 1.0MPa and enter spiral wound membrane module, select organic ultra-filtration membrane of molecular weight cut-off 2000Da in membrane module, under pressure-driven, remaining suspension particle, macromolecular colloid, dextran, starch etc. in clear juice obtain some or all of retaining, the sucrose being less than retaining molecular weight obtain completely through, obtain filtered liquid C, analytical results shows, through ultra-filtration membrane, the colourity of clear juice reduces 72%;
5), the described filtered liquid C after decolouring is pressurized to 2.5MPa and enters rolling nanofiltration membrane component, the organic nanofiltration membrane of molecular weight cut-off 200Da is selected in membrane module, under pressure-driven, moisture and small molecular organic acid, salt grade through nanofiltration membrane, sucrose is retained completely and is realized concentrated, obtains concentrated solution;
6), the described concentrated solution that obtains after concentrating of nanofiltration, the relative concentration of sucrose improves 50% in the peace and quiet clear juice obtained of ordinary chemical method, and purity improves 4.6%.Embodiment result shows, technique of the present invention can effectively reduce the colourity of syrup, improves purity and the concentration of sucrose.
7), by described concentrated solution entering thickener continues concentrated, and be concentrated to saturation concentration, decrease temperature crystalline, centrifugal solid-liquid obtains crystallised sugar product after being separated.
Embodiment 5
1), 200kg sugarcane mixes juice raw material, and sucrose content is 12%, through steam or hot water heating to 60 DEG C;
2), with sodium hydroxide regulate pH to 7, remove suspended particle through the non-woven fabrics sock filtration of 5 microns, obtain filtered liquid A;
3) tube type filter membrance assembly is entered after, described filtered liquid A being pressurized to 0.1MPa, select organic microfiltration membrane of 0.2 micron in membrane module, under pressure-driven, remaining suspension particle, macromolecular substance, colloid etc. in mixed juice are retained, sucrose obtain completely through, obtain filtered liquid B;
Described filtered liquid B quality is 180kg, and periosteum debris is 20kg, directly abandons;
4), transition liquid B described in 180kg is continued heating and maintain about 60 DEG C, be pressurized to 1.0MPa and enter spiral wound membrane module, organic ultra-filtration membrane of molecular weight cut-off 1000Da is selected in membrane module, under pressure-driven, remaining suspension particle, macromolecular substance, colloid, dextran, starch etc. in described filtered liquid B obtain some or all of retaining, the sucrose being less than retaining molecular weight obtain completely through, obtain filtered liquid C, described filtered liquid C quality is 162kg, volume film debris is 18kg, directly abandons.
Simultaneous test selects 200kg Cane Mixed Juice raw material equally, and the periosteum that the 20kg raffinate that preprocessing process produces reenters microfiltration process after sedimentation and sock filtration processes, and obtain 18kg permeate and 2kg debris, debris is directly abandoned.18kg permeate mix with the permeate of 180kg laggard enter the volume film of ultra-filtration process decolour.Permeate quality after the process of volume film is 178kg, volume film debris is 20kg, raffinate adds lime and the phosphoric acid of 1%, be heated to 100 DEG C boil 10 minutes after, get supernatant liquor after sedimentation and the periosteum reentering microfiltration process after sock filtration processes, the periosteum debris after process is that 2kg directly abandons, permeate quality is 18kg, merge with the feeding liquid of ultra-filtration process, realize the recycling of each process raffinate with this, improve sucrose yield further.
Show through test, after raffinate process, the sucrose rate of recovery of two-stage film workshop section is 95.6%, and undressed membrane process, total sucrose rate of recovery only has 81%.Embodiment result shows, novel process also adopts raffinate recovery process, effectively can improve the rate of recovery of sucrose.
Above said content is only embodiments of the invention; not thereby limit the scope of the invention; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or directly or indirectly use other relevant technical fields, be all considered as being included in scope of patent protection of the present invention.
Claims (9)
1. utilize Using Multistage Membranes isolation technique to refine a sugar refining technology for Cane Mixed Juice, it is characterized in that, comprise the following steps:
1), Cane Mixed Juice is heated;
2), in the Cane Mixed Juice of heating, alkaline matter adjust ph is added;
3), to the Cane Mixed Juice regulating pH value carry out pre-treatment, described pre-treatment object removes the impurity suspended in Cane Mixed Juice, obtains filtered liquid A;
4), by described filtered liquid A utilize microfiltration membrane technology to carry out secondary filtration, object removes wherein remaining suspended impurity, macromolecular substance, colloid, obtains filtered liquid B;
5), by described filtered liquid B utilize ultrafiltration membrane technique to refilter, described ultra-filtration membrane is greater than the material of sucrose by molecular weight cut-off, removes pigment and is greater than the nonsugar of sucrose, obtain filtered liquid C;
6), by described filtered liquid C utilize Nanofiltration-membrane technique to refilter, described nanofiltration membrane is greater than sucrose molecule by retaining sucrose molecules and molecular weight concentrates described filtered liquid C, removes molecular weight and is less than sucrose material, obtain concentrated solution;
7), by described concentrated solution entering thickener continues concentrated, and be concentrated to saturation concentration, decrease temperature crystalline, centrifugal solid-liquid obtains crystallised sugar product after being separated.
2. technique according to claim 1, is characterized in that: described pre-treatment is optionally filtered or sock filtration for centrifuging, video disc, is preferably centrifuging.
3. technique according to claim 1 and 2, it is characterized in that: in described microfiltration membrane technology, the micro-filtration membrane module adopted is optionally tubular module, wound module, hollow fiber form assembly and flat plate module, the pore diameter range of described microfiltration membrane is 0.1-0.8 micron, the service temperature of microfiltration process is 60-95 DEG C, working pressure 0.01-0.4MPa.
4. the technique according to any one of claim 1-3, it is characterized in that: described hyperfiltration membrane assembly is optionally wound module, tubular module, hollow fiber form assembly and flat plate module, the molecular weight cut-off of described ultra-filtration membrane is 1000-5000Da, preferred 1000Da, the service temperature of ultra-filtration process is 60-95 DEG C, working pressure 1.0-1.5MPa.
5. the technique according to any one of claim 1-4, it is characterized in that: described nanofiltration membrane component is wound module, described nanofiltration membrane molecular weight cut-off is 90-400Da, preferred 200Da, the service temperature of nanofiltration process is 60-95 DEG C, working pressure 2.0-4.0MPa.
6. the technique according to any one of claim 1-5, is characterized in that: the temperature of described Cane Mixed Juice heating is 60-95 DEG C, and described alkaline matter is sodium hydroxide or calcium hydroxide, preferred sodium hydroxide, and pH value is 6.8-7.5.
7. the technique according to any one of claim 1-6, it is characterized in that: the high-concentration and high-chromaticity raffinate also comprised ultra-filtration process produces carries out desolventing technology, comprise the following steps: after interpolation lime, interpolation sulfurous gas, interpolation carbonic acid gas, phosphoric acid carry out chemical treatment, then remove suspended matter through sedimentation filtration process.
8. the technique according to any one of claim 1-6, is characterized in that: described technique optionally also comprises step 3) preprocessing process produce residue and raffinate turn back to extracting sugarcane juice workshop section; And/or
By step 4) microfiltration process produce high-concentration suspension dirt solution turn back to step 3) carry out preprocessing process; And/or
By step 5) ultra-filtration process produce high-concentration and high-chromaticity raffinate after desolventing technology, turn back to step 4) carry out microfiltration process; And/or
Using step 6) nanofiltration process produce permeate turn back to washing room of squeezing the juice as bath water.
9. the technique according to any one of claim 1-5, is characterized in that: described separatory membranes at different levels, all selects resistant to elevated temperatures organic membrane.
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| CN107937628A (en) * | 2017-05-23 | 2018-04-20 | 中国科学院过程工程研究所 | The cane sugar manufacture system and its processing method that a kind of full constituent utilizes |
| WO2018214643A1 (en) * | 2017-05-23 | 2018-11-29 | 中国科学院过程工程研究所 | Sugar production system utilizing all components of sugarcane and treatment method thereof |
| AU2018273522B2 (en) * | 2017-05-23 | 2020-11-12 | Institute Of Process Engineering, Chinese Academy Of Sciences | Sugar production system utilizing all components of sugarcane and treatment method thereof |
| CN108588290A (en) * | 2018-05-10 | 2018-09-28 | 中国科学院过程工程研究所 | The system and its processing method of pigment and sugar in molasses are recycled in a kind of classification |
| CN108588289A (en) * | 2018-05-17 | 2018-09-28 | 中国科学院过程工程研究所 | A kind of antibiotic device, antibiotic method, embrane method cane sugar manufacture system and processing method for embrane method cane sugar manufacture system |
| CN110016525A (en) * | 2019-04-10 | 2019-07-16 | 中国科学院近代物理研究所 | A kind of functional food sugar grass syrup and preparation method thereof |
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