CN103725802B - The technique that a kind of sucrose is refining - Google Patents
The technique that a kind of sucrose is refining Download PDFInfo
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- CN103725802B CN103725802B CN201310739815.7A CN201310739815A CN103725802B CN 103725802 B CN103725802 B CN 103725802B CN 201310739815 A CN201310739815 A CN 201310739815A CN 103725802 B CN103725802 B CN 103725802B
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Abstract
The invention discloses the technique that a kind of sucrose is refining, 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.The invention has the advantages that: instead of sheet frame and lime precipitation step with ceramic micro filter, save 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, effectively reduce energy consumption; Adopt membrane concentration, separation and ion-exchange unit, reduce the floor space of equipment, reduce initial cost.
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
Usual people said " single stage method ", refer to 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 " is obtained, owing to processing the difference of cleaning technique, can be roughly 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, the quality of beet plantation white sugar has reached more than top grade product, and part reaches 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 usually.The sugarcane plantation white sugar adopting carbonatation process cleaning technique to produce, can reach the above quality standard of first grade, through process modification, can reach the quality level of more than top grade product, the same with beet plantation white sugar, directly can throw in retail market.Sugarcane arable land brown sugar (Saccharum Sinensis Roxb.), 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 for directly eating.
China is one of sugar industry main in the world and consumption big country, and domestic nearly 300 of the enterprise being engaged in sugar industry and processing, produces nearly 1,400 ten thousand tons of sucrose per year." two-step approach ", sulfurous method, carbonatation process is had at present at the sugar production process that China is conventional.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 obtains 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, investing relatively little, is current domestic main method for manufacturing sugar.But this technique also exists more shortcoming: first, its technique will adopt lime precipitation removal of impurities, and after filter press, can produce a large amount of residues, environmental pollution is more serious; Secondly, the decolouring of this technique uses stove drying method, has sulphur remnants in product, and to human health, along with country is to the further raising of food safety requirements, the method will be limited to use; 3rd, using in the method is that lime needs calcining, consumes larger energy and with waste discharge, too increases an operation section simultaneously on the one hand, increasing production cost; 4th, the concentration technology of the method adopts multiple-effect evaporator, and energy consumption is higher, and production cost remains high; 5th, this technique is relatively numerous and diverse, and equipment is many, and floor space is large, and Controlling Technology is complicated.
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 quality of sugar that the method obtains is not high, production technique has certain defect.The method has following shortcoming: the first, employs 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, and membrane flux can be caused very low, and fenestra easily blocks, not easy cleaning, and actual operability is not strong; And the temperature of this part operation section is all more than 40 DEG C, organic membrane non-refractory, the life-span of film can be shorter, rationally uneconomical; 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; 4th, employ traditional triple-effect evaporator, waste a large amount of energy, the modern techniquies such as MVR of comparing, energy consumption is higher.5th, relevant processing parameter does not reach optimization, causes the waste of the energy.
In view of this, the sucrose process for refining proposing a kind of improvement is still awaited.
Summary of the invention
The object of the invention is to the deficiencies in the prior art, provide the sucrose process for refining of a kind of energy-conserving and environment-protective, less investment, it has pollution-free, and quality product is high, and technical process is short, and energy consumption is low, invests little, the features 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, to squeeze the juice: sugarcane is squeezed by draining device, obtains 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 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 carries out preliminary pre-concentration;
E, ion-exchange decolouring: the sucrose mix juice spent ion exchange resin after pre-concentration is carried out ion-exchange decolouring;
F, ion-exchange desalination: the sucrose mix juice spent ion exchange resin after ion-exchange being decoloured carries out ion-exchange desalination;
G, concentrated: the sucrose mix juice obtained in step F is sent into vaporizer and concentrates, liquid glucose being concentrated to sugared brix is 65-75, obtains sucrose concentrated solution;
H, crystallization: when liquid glucose is concentrated to supersaturation, add crystal seed, slow cooling crystallization;
I, centrifugation: by crystallization of sucrose centrifuge;
J, drying: forced air drying, obtain 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.First by draining device after collection, as juice extractor etc., sugarcane is squeezed, obtain sugar cane juice.Then sugar cane juice is carried out pre-treatment through filtration unit, remove larger bagasse, to be applied to follow-up membrane sepn operation better.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 DEG C, and pressure is 0.1-0.5Mpa, preferred film aperture is 50-500nm, and temperature is 20-80 DEG C, and pressure is 0.1-0.5Mpa.Contriver finds, is especially 60 DEG C in temperature, and when pressure is 0.25MPa, can ensure that flux suppression ratio is comparatively slow, 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, the film that wherein nanofiltration membrane is 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 ensure that membrane flux is higher, fouling membrane slow, 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 ensure that the input concentration of subsequent processing section ion exchange resin is higher, enhance productivity; Slough the water of 2/3 on the other hand, the energy consumption of 50% can be saved, also eliminate the salinity of 60% simultaneously.
In this step, if produce steam for the energy with the bagasse that burns, pre-concentration device can be selected to be 2nd effect evaporator, the sucrose mix juice in step C is concentrated to 40%, the cost so often evaporating one ton of water is only 6-8 unit, can reduce production cost.If take fire coal as the energy, then carry out pre-concentration by nanofiltration membrane, then by the sucrose mix juice in step C at 1.0-4.0Mpa, molecular weight is that the nanofiltration membrane of 100-500Da carries out preliminary pre-concentration, makes the concentration of syrup be concentrated to 30%; Film wherein used is the organic nanofiltration membrane of ceramic material or polyethersulfone, polyamide-based material.In addition, the present invention surprisingly finds, pressure is transferred to 3.0MPa when maintaining constant, can ensures that average filtration flux is comparatively large, 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 DEG C.Contriver finds, be 1/8 at adsorption tower blade diameter length ratio, flow velocity is 4BV/h, and when temperature is 60 DEG C, the viscosity of liquid glucose is less, the best results of absorption, can decolorizing effect be ensured, make the colour of liquid glucose before evaporation at below 500IU, higher production efficiency can be ensured again, energy consumption is relatively low simultaneously, and the yield of sucrose is more than 99.6%.
Technique of the present invention, wherein, step F 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 DEG C.In addition, contriver finds, be 1/6 at adsorption tower blade diameter length ratio, flow velocity is 4BV/h, and when temperature is 50 DEG C, the best results of desalination, can slough the salinity of 92%, and the yield of sucrose is 99.8% simultaneously.
Technique of the present invention, wherein, the vaporizer in step G is MVR evaporation equipment, and thickening temperature is 30-60 DEG C.This MVR evaporation equipment can be larger reduction energy consumption, the evaporation energy consumption of more than 60% can be saved.
Technique of the present invention, step H is specially: first temperature is raised to 70 DEG C, when liquid glucose degree of supersaturation reaches 1.05, then adds 0.5% crystal seed, naturally cooling, cools the temperature to 50 DEG C, centrifugation decrease temperature crystalline.
Technique of the present invention, wherein during step I centrifugation, centrifugal rotational speed is 5000-8000rpm; Drying temperature in step J is 90-100 DEG C.
Technique tool of the present invention has the following advantages:
1, above-mentioned technique is adopted, 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%, Conductivity ash is 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 placement half a year, has no and returns look phenomenon in traditional technology.
2, the parameter of this technique to new installation and traditional technology has done a large amount of Optimization Works, obtains optimum processing parameter, ensure that the energy-efficient operation of production, and the quality of product is higher simultaneously.This production technique relative energy-saving, traditional processing technology of comparing, level of automation is high, can save the labour cost of 80%, and the production cost of ton sugar reduces the production cost of more than 30%, remarkable in economical benefits.
3, instead of traditional filter press and lime precipitation with ceramic membrane, eliminate filter press and lime method settling step, substantially reduce technical process, reduce human input on the one hand, improve production efficiency; Ceramic membrane is compared traditional polymeric amide or polyether sulfone material organic membrane, can withstand high temperatures, high pressure, chemical corrosion, and work-ing life is longer; It also avoid the pollution of solid waste to environment on the other hand.
4, with nanofiltration membrane is concentrated, pre-concentration is carried out to liquid glucose, significantly reduce the steam output of evaporation concentration below, reduce the workload of next step, reduce energy consumption, also reduce production cost simultaneously.In addition, this kind of nanofiltration membrane can also slough the salinity of about 60%, reduces the load of desalination resin below;
5, instead of traditional stove drying technique with ion exchange method decoloration process, solve the problem of sulphur remnants in finished product sucrose on the one hand; Also eliminate the operation section of stove drying on the other hand, reduce production cost;
6, ion exchange method desalination is used, more effective except the ash content in sugarcane juice, improve the quality of products.
7, concentrate with MVR equipment, significantly reduce energy consumption, and vaporization temperature is lower, sugared coking can not be made because temperature is high, 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 stablized.
9, adopt membrane separation plant and ion-exchange unit, reduce the floor space of equipment, reduce capital construction cost.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet that sucrose of the present invention is refined.
Embodiment
The present invention is further described below in conjunction with example.
reference examples
Following example is the traditional processing technology of sucrose:
First sugarcane is squeezed by juice extractor, obtain sugar cane juice; To mix sugarcane juice again respectively by trommel screen and 20 object screens, remove bagasse, then it is grey in advance to add appropriate milk of lime, regulates pH to 7.0, then sugarcane juice is warmed up to 60 DEG C, then passes into sulfurous gas and carry out sulphur drift, then adds appropriate milk of lime, regulates pH to 7.2; After again sugarcane juice being heated to 100 DEG C, sending into settling tank and slowly precipitate, by the rclarifying cane juice that obtains again by triple effect evaporation, purging, boiling-off, crystallization, drying with pack, obtain high quality white granulated sugar product.
The product finally obtained, its pigment removal reaches 92.8%, and the clearance of salinity reaches 87%, the Sucrose of product reaches 99.6%, Conductivity ash 0.1%, and colour is 130IU, and sulfurous gas 25mg/kg, reach the standard of country-level sugar, the production cost of sugar per ton is not less than 850 yuan.
embodiment 1
As shown in Figure 1, the novel process that sucrose of the present invention is refining comprises the following steps:
A, to squeeze the juice: sugarcane is squeezed by juice extractor, obtains sugar cane juice;
B, pre-treatment: the sugar cane juice obtained in steps A is carried out pre-treatment by screen cloth, remove larger bagasse, and the aperture of screen cloth is 100 orders;
C, micro-filtrate membrane filtration: by the sugar cane juice collected in step B, by 50nm microfiltration of ceramic membrane, the temperature of filtration is 20 DEG C, and filter pressure is 0.5Mpa, obtains sucrose mix juice clear liquid, and sucrose concentration is 12%;
D, pre-concentration: the sucrose mix juice obtained in step C is sent in 2nd effect evaporator and evaporates pre-concentration, sucrose concentration is concentrated to 40%;
E, ion-exchange decolouring: by obtain in step D concentrated after sucrose mix juice macroporous strong basic anionite-exchange resin decolour, blade diameter length ratio is 1/3, and flow velocity is 10BV/h, and temperature is 40 DEG C, the sucrose solution colour obtained is 500IU, and average percent of decolourization is 96.2%;
F, ion-exchange desalination: by the sucrose mix juice after the decolouring that obtains in step e, carry out desalination with highly acidic cation exchange column, blade diameter length ratio is 1/10, flow velocity is 4BV/h, temperature is 80 DEG C, and the conductance of the sucrose solution obtained is 150us/cm, and average ratio of desalinization is 95%;
G, concentrated: the sucrose mix juice obtained in step F is sent into MVR vaporizer, and thickening temperature is 60 DEG C, obtains sucrose concentrated solution, the brix 75 of sucrose concentrated solution;
H, crystallization: first temperature is raised to 70 DEG C, treat that the supersaturation degree of liquid glucose is about 1.05, naturally cooling decrease temperature crystalline, cools the temperature to 50 DEG C, then starts centrifugation;
I, centrifugation: crystallization of sucrose centrifuge is separated, rotating speed is 6000rpm, and the time is 30min;
J, drying: drying obtains finished product, temperature is 90 DEG C, 4h.
The product finally obtained, its pigment removal reaches 98.8%, the clearance of salinity reaches 97%, and the Sucrose of product reaches 99.9%, and Conductivity ash is 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.
Pre-concentration described in step D uses 2nd effect evaporator.
Thickening equipment described in step G is MVR evaporation equipment.
Ion exchange resin described in step F adopts storng-acid cation exchange resin.
embodiment 2
As shown in Figure 1, the novel process that sucrose of the present invention is refining comprises the following steps: sugarcane obtains sugar cane juice 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 DEG C, 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 DEG C, and the sucrose solution colourity obtained 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 DEG C, and the conductance of the sucrose solution obtained is the average ratio of desalinization of 360us/cm is 92%; Sucrose mix juice sends into MVR vaporizer, and thickening temperature is 45 DEG C, obtains sucrose concentrated solution, and the brix of sucrose concentrated solution is 70.Again temperature is raised to 70 DEG C, treat that the supersaturation degree of liquid glucose is about 1.05, naturally cooling decrease temperature crystalline, cools the temperature to 50 DEG C, then starts centrifugation.
Be separated by crystallization of sucrose centrifuge, rotating speed is 5000rpm, and the time is 40min; Sucrose after centrifugation carries out drying and obtains finished product, and drying temperature is 90 DEG C.
The product finally obtained, its pigment removal reaches 99.9%, the clearance of salinity reaches 96.7%, the Sucrose of product reaches 99.9%, and Conductivity ash is lower than 0.01%, and colour is 5IU, 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 novel process that sucrose of the present invention is refining comprises the following steps: squeezed by juice extractor by sugarcane, obtain sugar cane juice; Again sugar cane juice is carried out pre-treatment by filtering bag filter, remove larger bagasse, then by 500nm microfiltration of ceramic membrane, the temperature of filtration is 50 DEG C, and filter pressure is 0.3Mpa, obtains sucrose mix juice clear liquid, and concentration is 11.5%; Then the sucrose mix juice obtained is sent into organic nanofiltration membrane concentrating unit, sucrose mix juice is 4.0Mpa at pressure, and molecular weight is carry out preliminary pre-concentration in the nanofiltration membrane of 100Da, makes the concentration of syrup be concentrated to 30%, and has sloughed the salinity of 57%.Again by obtain concentrated after sucrose mix juice macroporous strong basic anionite-exchange resin decolour, blade diameter length ratio is 1/8, and flow velocity is 4BV/h, and temperature is 60 DEG C, and the sucrose solution colourity obtained is 460IU, and average percent of decolourization is 98.6%; And then carrying out desalination with zwitterion mixed bed exchange column, blade diameter length ratio is 1/6, and flow velocity is 2BV/h, and temperature is 50 DEG C, and the conductance of the sucrose solution obtained is the average ratio of desalinization of 270us/cm is 93%; Again the sucrose mix juice after concentrated is sent into MVR vaporizer, thickening temperature is 40 DEG C, obtains sucrose concentrated solution, and the brix of sucrose concentrated solution is 69; Again temperature is raised to 70 DEG C, treat that the supersaturation degree of liquid glucose is about 1.05, naturally cooling decrease temperature crystalline, cools the temperature to 50 DEG C, then starts centrifugation., after precipitation to be crystallized, be separated with centrifuge, rotating speed is 8000rpm, and the time is 20min, then the crystallization of sucrose drying obtained is obtained finished product, and temperature is 92 DEG C, 4h.
Through the product that this embodiment obtains, its pigment removal reaches 99.8%, the clearance of salinity reaches 97.3%, the Sucrose of product reaches 99.9%, and Conductivity ash is lower than 0.01%, and colour is 7IU, 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 novel process that sucrose of the present invention is refining comprises the following steps: squeezed by juice extractor by sugarcane, obtain sugar cane juice; Again sugar cane juice is carried out pre-treatment by filtering bag filter, remove larger bagasse, then by 50nm microfiltration of ceramic membrane, the temperature of filtration is 80 DEG C, and filter pressure is 0.25Mpa, obtains sucrose mix juice clear liquid, and concentration is 11.5%; Then the sucrose mix juice obtained is sent into organic nanofiltration membrane concentrating unit, sucrose mix juice is 3.0Mpa at pressure, and molecular weight is carry out preliminary pre-concentration in the nanofiltration membrane of 150Da, makes the concentration of syrup be concentrated to 32%, and has sloughed the salinity of 58%.Again by obtain concentrated after sucrose mix juice macroporous strong basic anionite-exchange resin decolour, blade diameter length ratio is 1/8, and flow velocity is 4BV/h, and temperature is 60 DEG C, and the sucrose solution colourity obtained is 230IU, and average percent of decolourization is 99.6%; And then carrying out desalination with zwitterion mixed bed exchange column, blade diameter length ratio is 1/6, and flow velocity is 4BV/h, and temperature is 50 DEG C, and the conductance of the sucrose solution obtained is the average ratio of desalinization of 170us/cm is 94.5%; Again the sucrose mix juice after concentrated is sent into MVR vaporizer, thickening temperature is 40 DEG C, obtains sucrose concentrated solution, and the brix of sucrose concentrated solution is 70; Again temperature is raised to 70 DEG C, treat that the supersaturation degree of liquid glucose is about 1.05, naturally cooling decrease temperature crystalline, cools the temperature to 50 DEG C, then starts centrifugation.After precipitation to be crystallized, be separated with centrifuge, rotating speed is 6000rpm, and the time is 20min, then the crystallization of sucrose drying obtained is obtained finished product, and temperature is 92 DEG C, 4h.
Through the product that this embodiment obtains, its pigment removal reaches 99.9%, the clearance of salinity reaches 97.1%, the Sucrose of product reaches 99.9%, and Conductivity ash is lower than 0.01%, and colour is 5IU, 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, do not depart from make under spirit of the present invention difference change all belong within protection scope of the present invention.
Claims (1)
1. the technique that sucrose is refining, is characterized in that, comprise the following steps:
A, to squeeze the juice: sugarcane is squeezed by draining device, obtains 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 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 carries out preliminary pre-concentration;
E, ion-exchange decolouring: the sucrose mix juice spent ion exchange resin after pre-concentration is carried out ion-exchange decolouring;
F, ion-exchange desalination: the sucrose mix juice spent ion exchange resin after ion-exchange being decoloured carries out ion-exchange desalination;
G, concentrated: the sucrose mix juice obtained in step F is sent into vaporizer and concentrates, liquid glucose being concentrated to brix is 65-75, obtains sucrose concentrated solution;
H, crystallization: when liquid glucose is concentrated to supersaturation, add crystal seed, slow cooling crystallization;
I, centrifugation: by crystallization of sucrose centrifuge;
J, drying: forced air drying, obtain finished product;
Micro-filtrate membrane filtration described in described step C film used is ceramic membrane, and membrane pore size is 50-500nm, and temperature is 20-80 DEG C, and pressure is 0.1-0.5Mpa;
Ion exchange resin in described 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 DEG C;
Described step F ion exchange resin is strongly-acid or weakly acidic cation-exchange resin, or the mixed bed of anion-cation exchange resin, and 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 DEG C;
Pre-concentration device in described step D is 2nd effect evaporator or nanofiltration membrane, the film that wherein nanofiltration membrane is used is the nanofiltration membrane of ceramic material or organic material, its molecular weight cut-off is 100-500Da, and filter pressure is 1.0-4.0Mpa, and the concentration of sucrose syrup is concentrated to 30-40%;
Vaporizer in described step G is MVR evaporation equipment, and thickening temperature is 30-60 DEG C;
In described step H, first temperature is raised to 70 DEG C, when liquid glucose degree of supersaturation reaches 1.05, then adds 0.5% crystal seed, naturally cooling, cool the temperature to 50 DEG C, centrifugation decrease temperature crystalline;
During described step I centrifugation, centrifugal rotational speed is 5000-8000rpm;
Drying temperature in described step J is 90-100 DEG C.
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