CN103725802A - Technology for refining saccharose - Google Patents
Technology for refining saccharose Download PDFInfo
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- CN103725802A CN103725802A CN201310739815.7A CN201310739815A CN103725802A CN 103725802 A CN103725802 A CN 103725802A CN 201310739815 A CN201310739815 A CN 201310739815A CN 103725802 A CN103725802 A CN 103725802A
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Abstract
The invention discloses a technology for refining saccharose. The technology comprises specific steps of juicing, pretreating, micro-filtering by a membrane, pre-concentrating, decoloring through ion exchange, desalting, evaporating and concentrating through MVR (mechanical vapor recompression), crystallizing, separating through centrifuging, and drying so as to obtain the saccharose crystal. The technology has the advantages that ceramic microfiltration substitutes for sedimentation by sheet frames and lime, so that the step of ultrafiltration is saved; due to concentration by the membrane, the evaporation capacity of evaporation and concentration equipment is reduced, the energy consumption is lowered, and part of inorganic salt is removed; the technology of decoloring and removing impurities through ion exchange substitutes for the technology of stoving, so that the problem of residual sulphur in the saccharose is solved, and the quality of the product is improved; the manner of ion exchange can effectively remove the salt in cane juice; energy consumption is effectively lowered due to the MVR; by adopting the membrane concentration and separation and ion exchange equipment, the floor space of the equipment is reduced, and investment of capital construction is lowered.
Description
Technical field
The present invention relates to a kind of sucrose treating process, be specifically related to a kind of process for refining.
Background technology
Conventionally people's said " single stage method ", refer in the sugar refinery, field in sugar material producing region, on the spot processed sugar material (sugarcane, beet) direct production commerieal sugar, i.e. " sugar of ploughing "; Comprise: arable land white sugar, arable land brown sugar (Saccharum Sinensis Roxb.), arable land brown sugar etc.The sugar that " single stage method " makes, due to the difference of processing cleaning technique, can roughly be divided into carbonatation process (cleaning technique) sugar, sulfurous method (cleaning technique) sugar, lime method (cleaning technique) sugar etc.
World's beet-sugar factory is all " single stage method ", adopts carbonatation process cleaning technique, produces beet plantation white sugar; Along with the raising of Sugarbeet Quality and the improvement of Technology, more than the quality of beet plantation white sugar has reached top grade product, part has reached the quality level of purified sugar.Cane sugar factory also all adopts " single stage method "; Technology for clarifying syrup has carbonatation process, sulfurous method, lime method three major types conventionally.The sugarcane plantation white sugar that adopts carbonatation process cleaning technique to produce, can reach the above quality standard of first grade, through process modification, can reach quality level more than top grade product, the same with beet plantation white sugar, can directly throw in retail market.Sugarcane arable land brown sugar (Saccharum Sinensis Roxb.), the arable land brown sugar that lime method cleaning technique is produced all can reach the requirement of country to sugar hygienic standard and physical and chemical index, can be for directly edible.
China is one of main in the world sugar industry and consumption big country, and nearly 300 of the domestic enterprise that is engaged in sugar industry and processing, produces nearly 1,400 ten thousand tons of sucrose per year.At present in the conventional sugar industry technique of China, there are " two-step approach ", sulfurous method, carbonatation process.The investment of " two-step approach " is large, and technical process is complicated, and production cost is too high, is not suitable at home promoting; The sucrose quality that carbonatation process makes is better, but complex process, long flow path, investment is large, and environmental pollution is more serious; Sulfurous method because of its technique more ripe, invest relatively littlely, be current domestic main method for manufacturing sugar.But also there is more shortcoming in this technique: first, its technique will adopt lime precipitation removal of impurities, after filter press, can produce a large amount of residues, and environmental pollution is more serious; Secondly, the decolouring of this technique is to use stove drying method, has sulphur remnants in product, harmful to HUMAN HEALTH, and along with the further raising of country to food safety requirements, the method will be limited to use; The 3rd, in the method, using is that lime needs calcining, has consumed larger energy on the one hand and with waste discharge, has also increased an operation section simultaneously, increases production cost; The 4th, the concentration technology of the method adopts multiple-effect evaporator, and energy consumption is higher, and production cost is high; The 5th, this technique is relatively numerous and diverse, and equipment is many, and floor space is large, controls complex process.
Separately have document and patent report, have scholar to adopt ultra-filtration membrane to add the explained hereafter sucrose of nanofiltration membrane and ion-exchange resin decolorization, but the sugared quality that the method obtains is not high, production technique has certain defect.The method has following shortcoming: the first, used filter press, and belong to more traditional, level of automation is lower, labor-intensive equipment, the work under bad environment of this equipment, production efficiency is low; The second, directly use the ultra-filtration membrane of molecular weight 10000, before there is no microfiltration membrane pre-treatment, in liquid glucose, the macromolecular substance such as colloid, starch content is more, can cause membrane flux very low, fenestra easily stops up, easy cleaning not, actual operability is not strong; And the temperature of this part operation section is all more than 40 ℃, organic membrane non-refractory, the life-span of film can be shorter, uneconomical rationally; The 3rd, do not make spent ion exchange resin desalination, cannot remove salinity remaining in liquid glucose, cause product ash content higher, quality is lower or defective; The 4th, used traditional triple-effect evaporator, wasted a large amount of energy, the modern techniquies such as MVR of comparing, energy consumption is higher.The 5th, relevant processing parameter does not reach optimization, causes the waste of the energy.
In view of this, still await proposing a kind of improved sucrose process for refining.
Summary of the invention
The object of the invention is to the deficiencies in the prior art, the sucrose process for refining of a kind of energy-conserving and environment-protective, less investment is provided, it has pollution-free, and quality product is high, and technical process is short, and energy consumption is low, invest little, the feature such as floor space is little.
For achieving the above object, the present invention adopts following technical scheme,
The technique that sucrose is refining, comprises the following steps:
A, squeeze the juice: sugarcane is squeezed by draining device, obtain sugar cane juice;
B, pre-treatment: by sugar cane juice after filtration device carry out pre-treatment, remove larger bagasse;
C, micro-filtrate membrane filtration: pretreated sugar cane juice is obtained to sucrose mix juice clear liquid through micro-filtrate membrane filtration;
D, pre-concentration: sucrose mix juice clear liquid is sent into pre-concentration device and carry out preliminary pre-concentration;
E, ion-exchange decolouring: the sucrose mix juice spent ion exchange resin after pre-concentration is carried out to ion-exchange decolouring;
F, ion-exchange desalination: the sucrose mix juice spent ion exchange resin after ion-exchange decolouring is carried out to ion-exchange desalination;
G, concentrated: the sucrose mix juice obtaining in step F is sent into vaporizer concentrated, it is 65-75 that liquid glucose is concentrated to sugar hammer degree, obtains sucrose concentrated solution;
H, crystallization: when liquid glucose is concentrated to supersaturation, add crystal seed, slow cooling crystallization;
I, centrifugation: crystallization of sucrose is centrifugal with whizzer;
J, dry: forced air drying, obtains finished product.
Process for refining of the present invention is applicable to various conventional sugarcane raw material understood by one of ordinary skill in the art.After collection, first by draining device, as juice extractor etc., sugarcane is squeezed, obtain sugar cane juice.Then sugar cane juice is carried out to pre-treatment through filtration unit, remove larger bagasse, to be applied to better follow-up membrane sepn operation.Filtration unit herein includes but are not limited to: deep bed filter or screen cloth (aperture of screen cloth is preferably 100-200 order) etc., fully to remove bagasse.
Technique of the present invention, wherein, the film used of the micro-filtrate membrane filtration described in step C is ceramic membrane, membrane pore size is 50-500nm, and temperature is 20-80 ℃, and pressure is 0.1-0.5Mpa, preferred film aperture is 50-500nm, and temperature is 20-80 ℃, and pressure is 0.1-0.5Mpa.Contriver finds, in temperature, is especially 60 ℃, when pressure is 0.25MPa, can guarantee that flux suppression ratio is slower, and energy consumption is relatively low simultaneously.
Technique of the present invention, wherein, pre-concentration device in step D is 2nd effect evaporator or nanofiltration membrane, wherein nanofiltration membrane film used is the nanofiltration membrane of ceramic material or organic material, its molecular weight cut-off is 100-500Da, filter pressure is 1.0-4.0Mpa, and the concentration of sucrose syrup is concentrated to 30-40%.Contriver finds, when the membrane pore size of nanofiltration membrane is 150Da, can guarantee that membrane flux is higher, film pollutes slowly, and film is very high to the rejection of sucrose simultaneously, and the yield of sucrose is more than 99.9%.In addition, contriver also finds, when sucrose syrup is concentrated to 30-40%, cycles of concentration is higher, can guarantee that the input concentration of subsequent processing section ion exchange resin is higher, enhances productivity; Slough on the other hand 2/3 water, can save 50% energy consumption, also removed 60% salinity simultaneously.
In this step, it is the energy that the bagasse that burns if take produces steam, and can select pre-concentration device is 2nd effect evaporator, and the sucrose mix juice in step C is concentrated to 40%, and the cost of one ton of water of every like this evaporation is only 6-8 unit, can reduce production costs.If take fire coal as the energy, by nanofiltration membrane, carry out pre-concentration, by the sucrose mix juice in step C at 1.0-4.0Mpa, the nanofiltration membrane that molecular weight is 100-500Da is carried out preliminary pre-concentration, makes the concentration of syrup be concentrated to 30%; Wherein film used is the organic nanofiltration membrane of ceramic material or polyethersulfone, polyamide-based material.In addition, the present invention surprisingly finds, when pressure is transferred to 3.0MPa and is remained constant, can guarantee that average filtration flux is larger, can reach 20L/m
2h, can effectively enhance productivity like this.
Technique of the present invention, wherein, the ion exchange resin in step e is macroporous strong basic anionite-exchange resin, and the blade diameter length ratio of macroporous resin adsorption tower is 1/3-1/10, and flow velocity is 2-10BV/h, and temperature is 40-80 ℃.Contriver finds, at adsorption tower blade diameter length ratio, be 1/8, flow velocity is 4BV/h, and when temperature is 60 ℃, the viscosity of liquid glucose is less, the best results of absorption, can guarantee decolorizing effect, make the colour of evaporating front liquid glucose below 500IU, can guarantee higher production efficiency again, energy consumption is relatively low simultaneously, and the yield of sucrose surpasses 99.6%.
Technique of the present invention, wherein, step F intermediate ion exchange resin is strongly-acid or weakly acidic cation-exchange resin, or the mixed bed of anion-cation exchange resin, described ion exchange resin adsorption tower blade diameter length ratio is 1/3-1/10, and flow velocity is 2-10BV/h, and temperature is 20-80 ℃.In addition, contriver finds, at adsorption tower blade diameter length ratio, is 1/6, and flow velocity is 4BV/h, and when temperature is 50 ℃, the best results of desalination, can slough 92% salinity, and the yield of sucrose is 99.8% simultaneously.
Technique of the present invention, wherein, the vaporizer in step G is MVR evaporation equipment, thickening temperature is 30-60 ℃.This MVR evaporation equipment can be larger reduction energy consumption, can save more than 60% evaporation energy consumption.
Technique of the present invention, step H is specially: first temperature is raised to 70 ℃, until liquid glucose degree of supersaturation, reaches at 1.05 o'clock, then add 0.5% crystal seed, naturally cooling, cools the temperature to 50 ℃, centrifugation decrease temperature crystalline.
Technique of the present invention, wherein centrifugal rotational speed is 5000-8000rpm during step I centrifugation; Drying temperature in step J is 90-100 ℃.
Technique tool of the present invention has the following advantages:
1, adopt above-mentioned technique, get final product the highly purified sucrose of Mass production, the pigment removal of product reaches 99.9%, and the clearance of salinity reaches 97.1%, the Sucrose of product reaches 99.9%, electricity is led ash content lower than 0.01%, and colour is lower than 10IU, and content of sulfur dioxide does not detect, reach the standard of national refined sugar, simultaneously the rate of recovery of sucrose is more than 99.2%, and this sucrose finished product, after placing half a year, has no and returns look phenomenon in traditional technology.
2, this technique has been done a large amount of Optimization Works to the parameter of new installation and traditional technology, obtains optimum processing parameter, has guaranteed the energy-efficient operation of producing, and the quality of product is higher simultaneously.This production technique relative energy-saving, the traditional processing technology of comparing, level of automation is high, can save 80% labour cost, and the production cost of ton sugar has reduced more than 30% production cost, remarkable in economical benefits.
3, with ceramic membrane, substitute traditional filter press and lime precipitation, saved filter press and lime method settling step, greatly shortened technical process, reduced human input on the one hand, improved production efficiency; Ceramic membrane compare traditional polymeric amide or polyether sulfone material organic membrane, can withstand high temperatures, high pressure, chemical corrosion, and work-ing life is longer; Also avoided on the other hand the pollution of solid waste to environment.
4, with nanofiltration membrane is concentrated, liquid glucose is carried out to pre-concentration, effectively reduced the steam output of evaporation concentration below, reduced the workload of next step, reduced energy consumption, also reduced production cost simultaneously.In addition, this kind of nanofiltration membrane can also be sloughed the salinity of 60% left and right, reduces the load of desalination resin below;
5, with ion exchange method decoloration process, substitute traditional stove drying technique, solved on the one hand the problem of sulphur remnants in finished product sucrose; Also the operation section of having saved on the other hand stove drying, reduces production cost;
6, use ion exchange method desalination, more effectively except the ash content in sugarcane juice, improve the quality of products.
7, concentrated with MVR equipment, greatly reduced energy consumption, and vaporization temperature is lower, can because temperature is high, not make sugared coking, produce new pigment.
8, production technique is comparatively simple, and flow process is shorter, and control process is simple, and personnel labor intensity and usage quantity greatly reduce, and production quality control is stable.
9, adopt membrane separation plant and ion-exchange unit, reduced the floor space of equipment, reduced capital construction cost.
Accompanying drawing explanation
Fig. 1 is the refining schematic flow sheet of sucrose of the present invention.
Embodiment
Below in conjunction with example, further describe the present invention.
reference examples
Below be exemplified as the traditional processing technology of sucrose:
First sugarcane is squeezed by juice extractor, obtain sugar cane juice; To mix again sugarcane juice respectively by trommel screen and 20 object screens, remove bagasse, then add appropriate milk of lime ash in advance, regulate pH to 7.0, then sugarcane juice will be warmed up to 60 ℃, then pass into sulfurous gas and carry out sulphur and float, then add appropriate milk of lime, regulate pH to 7.2; Again sugarcane juice is heated to after 100 ℃, sends into settling tank and slowly precipitate, the rclarifying cane juice obtaining, again by triple effect evaporation, purging, boiling-off, crystallization, dry and packing, is obtained to high quality white granulated sugar product.
The product finally obtaining, its pigment removal reaches 92.8%, and the clearance of salinity reaches 87 %, the Sucrose of product reaches 99.6%, and electricity is led ash content 0.1%, and colour is 130 IU, and sulfurous gas 25mg/kg, reaches the standard of country-level sugar, and the production cost of sugar per ton is not less than 850 yuan.
embodiment 1
As shown in Figure 1, the refining novel process of sucrose of the present invention comprises the following steps:
A, squeeze the juice: sugarcane is squeezed by juice extractor, obtain sugar cane juice;
B, pre-treatment: the sugar cane juice obtaining in steps A is carried out to pre-treatment by screen cloth, remove larger bagasse, the aperture of screen cloth is 100 orders;
C, micro-filtrate membrane filtration: by the sugar cane juice of collecting in step B, by 50nm microfiltration of ceramic membrane, the temperature of filtration is 20 ℃, and filter pressure is 0.5Mpa, obtains sucrose mix juice clear liquid, and sucrose concentration is 12%;
D, pre-concentration: the sucrose mix juice obtaining in step C is sent in 2nd effect evaporator and evaporated pre-concentration, sucrose concentration is concentrated to 40%;
E, ion-exchange decolouring: by step D, obtain concentrated after sucrose mix juice with macroporous strong basic anionite-exchange resin, decolour, blade diameter length ratio is 1/3, and flow velocity is 10BV/h, and temperature is 40 ℃, the sucrose solution colour obtaining is 500IU, and average percent of decolourization is 96.2%;
F, ion-exchange desalination: by the sucrose mix juice after the decolouring obtaining in step e, with highly acidic cation exchange column, carry out desalination, blade diameter length ratio is 1/10, flow velocity is 4BV/h, temperature is 80 ℃, and the electricity of the sucrose solution obtaining is led as 150us/cm, and average ratio of desalinization is 95%;
G, concentrated: the sucrose mix juice obtaining in step F is sent into MVR vaporizer, and thickening temperature is 60 ℃, obtains sucrose concentrated solution, the hammer degree 75 of sucrose concentrated solution;
H, crystallization: first temperature is raised to 70 ℃, the supersaturation degree for the treatment of liquid glucose is 1.05 left and right, naturally cooling decrease temperature crystalline cools the temperature to 50 ℃, then starts centrifugation;
I, centrifugation: by crystallization of sucrose whizzer centrifugation, rotating speed is 6000rpm, and the time is 30min;
J, dry: be dried and obtain finished product, temperature is 90 ℃, 4h.
The product finally obtaining, its pigment removal reaches 98.8%, the clearance of salinity reaches 97 %, and the Sucrose of product reaches 99.9%, and electricity is led ash content lower than 0.01%, colour is 12IU, and content of sulfur dioxide does not detect, reach the standard of national refined sugar, the rate of recovery of sucrose is more than 99.2% simultaneously, energy-efficient, the production cost of sugar per ton is 600 yuan.
The present embodiment, the microfiltration membrane equipment film used described in step C is the filter membrane of ceramic membrane material.
What the pre-concentration described in step D was used is 2nd effect evaporator.
Thickening equipment described in step G is MVR evaporation equipment.
Ion exchange resin described in step F is to adopt storng-acid cation exchange resin.
embodiment 2
As shown in Figure 1, the refining novel process of sucrose of the present invention comprises the following steps: sugarcane obtains sugar cane juice by after squeezing the juice, and sugar cane juice carries out pre-treatment by 200 object screen clothes, removes larger bagasse, obtains sugar cane juice; Sugar cane juice is by 200nm microfiltration of ceramic membrane, and the temperature of filtration is 80 ℃, and filter pressure is 0.1Mpa, obtains sucrose mix juice clear liquid, and concentration is 12.5%; Sugar cane juice clear liquid enters nano filter membrance device and concentrates, and nanofiltration membrane material is ceramic material, and molecular weight cut-off is 100Da, and control pressure is 4.0MPa, and syrup concentration is 30%, and salinity clearance is 53%.Sucrose mix juice after concentrated enters macroporous strong basic anionite-exchange resin and decolours, and blade diameter length ratio is 1/10, and flow velocity is 2BV/h, and temperature is 80 ℃, and the sucrose solution colourity obtaining is 250IU, and average percent of decolourization is 99.1%; Sucrose mix juice after decolouring, carries out desalination with zwitterion mixed bed exchange column, and blade diameter length ratio is 1/3, and flow velocity is 10BV/h, and temperature is 20 ℃, the electricity of the sucrose solution obtaining lead for the average ratio of desalinization of 360us/cm be 92%; Sucrose mix juice is sent into MVR vaporizer, and thickening temperature is 45 ℃, obtains sucrose concentrated solution, and the hammer degree of sucrose concentrated solution is 70.Temperature is raised to 70 ℃ again, the supersaturation degree for the treatment of liquid glucose is 1.05 left and right, and naturally cooling decrease temperature crystalline cools the temperature to 50 ℃, then starts centrifugation.
By crystallization of sucrose whizzer centrifugation, rotating speed is 5000rpm, and the time is 40min; Sucrose after centrifugation is dried and obtains finished product, and drying temperature is 90 ℃.
The product finally obtaining, its pigment removal reaches 99.9%, the clearance of salinity reaches 96.7 %, the Sucrose of product reaches 99.9%, and electricity is led ash content lower than 0.01%, and colour is 5 IU, and content of sulfur dioxide does not detect, reach the standard of national refined sugar, the rate of recovery of sucrose is more than 99.1% simultaneously, and the production cost of sugar per ton is 680 yuan.
embodiment 3
As shown in Figure 1, the refining novel process of sucrose of the present invention comprises the following steps: sugarcane is squeezed by juice extractor, obtain sugar cane juice; Again sugar cane juice is carried out to pre-treatment by filtering bag filter, remove larger bagasse, then, by 500nm microfiltration of ceramic membrane, the temperature of filtration is 50 ℃, and filter pressure is 0.3Mpa, obtains sucrose mix juice clear liquid, and concentration is 11.5%; Then the sucrose mix juice obtaining is sent into organic nanofiltration membrane concentrating unit, sucrose mix juice is 4.0Mpa at pressure, carries out preliminary pre-concentration in the nanofiltration membrane that molecular weight is 100Da, makes the concentration of syrup be concentrated to 30%, and has sloughed 57% salinity.Again by obtain concentrated after sucrose mix juice with macroporous strong basic anionite-exchange resin, decolour, blade diameter length ratio is 1/8, flow velocity is 4BV/h, temperature is 60 ℃, the sucrose solution colourity obtaining is 460 IU, on average percent of decolourization is 98.6%; And then with zwitterion mixed bed exchange column, carry out desalination, blade diameter length ratio is 1/6, flow velocity is 2BV/h, temperature is 50 ℃, the electricity of the sucrose solution obtaining lead for the average ratio of desalinization of 270us/cm be 93%; Again the sucrose mix juice after concentrated is sent into MVR vaporizer, thickening temperature is 40 ℃, obtains sucrose concentrated solution, and the hammer degree of sucrose concentrated solution is 69; Temperature is raised to 70 ℃ again, the supersaturation degree for the treatment of liquid glucose is 1.05 left and right, and naturally cooling decrease temperature crystalline cools the temperature to 50 ℃, then starts centrifugation., after to be crystallized separating out, use whizzer centrifugation, rotating speed is 8000rpm, and the time is 20min, then the crystallization of sucrose obtaining is dried and obtains finished product, and temperature is 92 ℃, 4h.
The product obtaining through this embodiment, its pigment removal reaches 99.8%, the clearance of salinity reaches 97.3 %, the Sucrose of product reaches 99.9%, and electricity is led ash content lower than 0.01%, and colour is 7 IU, and content of sulfur dioxide does not detect, reach the standard of national refined sugar, the rate of recovery of sucrose is more than 99.4% simultaneously, and the production cost of sugar per ton is 620 yuan.
embodiment 4
As shown in Figure 1, the refining novel process of sucrose of the present invention comprises the following steps: sugarcane is squeezed by juice extractor, obtain sugar cane juice; Again sugar cane juice is carried out to pre-treatment by filtering bag filter, remove larger bagasse, then, by 50nm microfiltration of ceramic membrane, the temperature of filtration is 80 ℃, and filter pressure is 0.25Mpa, obtains sucrose mix juice clear liquid, and concentration is 11.5%; Then the sucrose mix juice obtaining is sent into organic nanofiltration membrane concentrating unit, sucrose mix juice is 3.0Mpa at pressure, carries out preliminary pre-concentration in the nanofiltration membrane that molecular weight is 150Da, makes the concentration of syrup be concentrated to 32%, and has sloughed 58% salinity.Again by obtain concentrated after sucrose mix juice with macroporous strong basic anionite-exchange resin, decolour, blade diameter length ratio is 1/8, flow velocity is 4BV/h, temperature is 60 ℃, the sucrose solution colourity obtaining is 230 IU, on average percent of decolourization is 99.6%; And then with zwitterion mixed bed exchange column, carry out desalination, blade diameter length ratio is 1/6, flow velocity is 4BV/h, temperature is 50 ℃, the electricity of the sucrose solution obtaining lead for the average ratio of desalinization of 170us/cm be 94.5%; Again the sucrose mix juice after concentrated is sent into MVR vaporizer, thickening temperature is 40 ℃, obtains sucrose concentrated solution, and the hammer degree of sucrose concentrated solution is 70; Temperature is raised to 70 ℃ again, the supersaturation degree for the treatment of liquid glucose is 1.05 left and right, and naturally cooling decrease temperature crystalline cools the temperature to 50 ℃, then starts centrifugation.After to be crystallized separating out, use whizzer centrifugation, rotating speed is 6000rpm, and the time is 20min, then the crystallization of sucrose obtaining is dried and obtains finished product, and temperature is 92 ℃, 4h.
The product obtaining through this embodiment, its pigment removal reaches 99.9%, the clearance of salinity reaches 97.1 %, the Sucrose of product reaches 99.9%, and electricity is led ash content lower than 0.01%, and colour is 5 IU, and content of sulfur dioxide does not detect, reach the standard of national refined sugar, the rate of recovery of sucrose is more than 99.6% simultaneously, and the production cost of sugar per ton is 650 yuan.
Embodiments of the present invention are not limited to above-mentioned example, are not departing within the difference made under spirit of the present invention changes and all belong to protection scope of the present invention.
Claims (9)
1. the refining technique of sucrose, is characterized in that, comprises the following steps:
A, squeeze the juice: sugarcane is squeezed by draining device, obtain sugar cane juice;
B, pre-treatment: by sugar cane juice after filtration device carry out pre-treatment, remove larger bagasse;
C, micro-filtrate membrane filtration: pretreated sugar cane juice is obtained to sucrose mix juice clear liquid through micro-filtrate membrane filtration;
D, pre-concentration: sucrose mix juice clear liquid is sent into pre-concentration device and carry out preliminary pre-concentration;
E, ion-exchange decolouring: the sucrose mix juice spent ion exchange resin after pre-concentration is carried out to ion-exchange decolouring;
F, ion-exchange desalination: the sucrose mix juice spent ion exchange resin after ion-exchange decolouring is carried out to ion-exchange desalination;
G, concentrated: the sucrose mix juice obtaining in step F is sent into vaporizer concentrated, it is 65-75 that liquid glucose is concentrated to hammer degree, obtains sucrose concentrated solution;
H, crystallization: when liquid glucose is concentrated to supersaturation, add crystal seed, slow cooling crystallization;
I, centrifugation: crystallization of sucrose is centrifugal with whizzer;
J, dry: forced air drying, obtains finished product.
2. the refining technique of sucrose according to claim 1, is characterized in that: the film used of the micro-filtrate membrane filtration described in step C is ceramic membrane, and membrane pore size is 50-500nm, and temperature is 20-80 ℃, and pressure is 0.1-0.5Mpa.
3. the refining technique of sucrose according to claim 1, it is characterized in that: the pre-concentration device in step D is 2nd effect evaporator or nanofiltration membrane, wherein nanofiltration membrane film used is the nanofiltration membrane of ceramic material or organic material, its molecular weight cut-off is 100-500Da, filter pressure is 1.0-4.0Mpa, and the concentration of sucrose syrup is concentrated to 30-40%.
4. the refining technique of sucrose according to claim 1, is characterized in that: the ion exchange resin in step e is macroporous strong basic anionite-exchange resin, and the blade diameter length ratio of macroporous resin adsorption tower is 1/3-1/10, and flow velocity is 2-10BV/h, and temperature is 40-80 ℃.
5. the refining technique of sucrose according to claim 1, it is characterized in that: step F intermediate ion exchange resin is strongly-acid or weakly acidic cation-exchange resin, or the mixed bed of anion-cation exchange resin, described ion exchange resin adsorption tower blade diameter length ratio is 1/3-1/10, flow velocity is 2-10BV/h, and temperature is 20-80 ℃.
6. the refining technique of sucrose according to claim 1, is characterized in that: the vaporizer in step G is MVR evaporation equipment, and thickening temperature is 30-60 ℃.
7. the refining technique of sucrose according to claim 1, is characterized in that: in step H, first temperature is raised to 70 ℃, until liquid glucose degree of supersaturation, reaches at 1.05 o'clock, then add 0.5% crystal seed, naturally cooling, cools the temperature to 50 ℃, centrifugation decrease temperature crystalline.
8. the refining technique of a kind of sucrose according to claim 1, is characterized in that: during step I centrifugation, centrifugal rotational speed is 5000-8000rpm.
9. the refining technique of a kind of sucrose according to claim 1, is characterized in that: the drying temperature in step J is 90-100 ℃.
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| WO2016141886A1 (en) * | 2015-03-11 | 2016-09-15 | 广西叶茂机电自动化有限责任公司 | Sugarcane potable water and production process for compound sugarcane juice beverage |
| WO2017049745A1 (en) * | 2015-09-21 | 2017-03-30 | 江苏久吾高科技股份有限公司 | Membrane separation production method and device for edible raw sugar |
| CN108203739A (en) * | 2016-12-19 | 2018-06-26 | 湖南尔康制药股份有限公司 | A kind of process for purification of medical cane sugar |
| CN108220485A (en) * | 2016-12-10 | 2018-06-29 | 湖南尔康制药股份有限公司 | A kind of method of gradient centrifugation extraction sucrose |
| CN109971892A (en) * | 2019-04-30 | 2019-07-05 | 广东省生物工程研究所（广州甘蔗糖业研究所） | A kind of sugar-cane juice is clarified without sulphur and desalination system and method |
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| CN110541049A (en) * | 2019-09-12 | 2019-12-06 | 淮阴工学院 | Method for removing soluble starch in crude sucrose |
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| CN113462822A (en) * | 2021-08-03 | 2021-10-01 | 广西大学 | Sugar production process based on membrane method clarification poly-generation |
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