阅读说明：本技术 一种甘蔗制糖精炼工艺 (Sugarcane sugar refining process ) 是由 刘颖慰 田博 温惠宇 徐光辉 谢凌波 韦利金 于 2021-10-22 设计创作，主要内容包括：本发明一种甘蔗制糖精炼工艺,以连续色谱分离蔗糖糖蜜中蔗糖的技术为核心,优化了连续色谱操作工艺的工艺参数,以连续色谱技术替代制糖工艺中的回收糖重结晶环节,同时配合传统制糖的结晶工艺,一方面通过连续色谱分离技术完全回收糖蜜中的蔗糖,另一方面可减少重结晶级数,降低反复煮糖造成的蔗糖转化损失,实现精炼制糖工艺中蔗糖分收回提高到99%以上；在副产物糖蜜进入连续色谱装置前,先在副产物糖蜜中加入调和溶液,通过调和溶液的调和作用,可以适当缓解增大柱径导致的流速的径向滞后的问题,流速分布不均的问题也得到一定的缓解,从而改善分离效果,实现精炼制糖工艺中蔗糖分收回提高到99.5%以上。(The invention relates to a refining process for sugar production from sugarcane, which takes a technology of separating sucrose from cane sugar molasses by continuous chromatography as a core, optimizes process parameters of a continuous chromatography operation process, replaces a recrystallization link of recovered sugar in the sugar production process by the continuous chromatography technology, and is matched with a traditional crystallization process for sugar production, so that on one hand, the sucrose in the cane sugar is completely recovered by the continuous chromatography separation technology, on the other hand, the number of recrystallization stages can be reduced, the conversion loss of the sucrose caused by repeated sugar boiling is reduced, and the recovery of the sucrose in the refining sugar production process is improved to more than 99 percent; before the byproduct molasses enters the continuous chromatographic device, the blending solution is added into the byproduct molasses, the problem of radial hysteresis of flow rate caused by increase of column diameter can be properly relieved through the blending effect of the blending solution, the problem of uneven flow rate distribution is also relieved to a certain extent, so that the separation effect is improved, and the sucrose recycling in the refining sugar-making process is improved to more than 99.5%.)

1. A refining process for sugar production of sugarcane comprises the following operations: the raw sugar syrup enters a centrifugal honey separator through traditional decoloration and desalination, evaporation and concentration, filtration and impurity removal, sugar boiling and crystallization, crystallization assistance and massecuite distribution, honey separation is realized through the centrifugal honey separator to obtain a refined sucrose product and a byproduct molasses, and the refined sucrose product after honey separation enters subsequent processing and finished product packaging links; the method is characterized by further comprising the following operations:

the by-product molasses enters a continuous chromatographic device, and the conventional recrystallization sucrose recovery process is completely or partially replaced by a continuous chromatographic operation process, so that the separation of sucrose components and non-sucrose components is realized, and the sucrose components and the non-sucrose components are obtained; returning the sucrose component to the front-end decoloring and desalting step, wherein the non-sucrose component does not contain sucrose, and directly treating the non-sucrose component as waste molasses;

the technological parameters of the continuous chromatographic operation process are as follows: the content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled to be 10-80% (w/w), the operating temperature of the continuous chromatographic device is controlled to be 20-90 ℃, the pH value is controlled to be 3.0-12.0, the mass flow ratio of water inlet to feeding is controlled to be 0.5-3.0, and the mass flow ratio of the sucrose component material flow and the non-sucrose component material flow is 0.4-4.0.

2. A refining process for sugar production from sugar cane according to claim 1, wherein the continuous chromatographic operation process is based on the principle of continuous chromatography, and the continuous chromatographic operation process is a conventional simulated moving bed chromatographic technique, a sequential simulated moving bed chromatographic technique or a continuous ion exchange technique.

3. The refining process for making sugar from sugarcane according to claim 1, wherein the continuous chromatographic operation process is used for replacing the traditional recrystallization sucrose recovery process in whole or in part, and the continuous chromatographic operation process can be inserted into any stage of the traditional recrystallization sucrose recovery process.

4. A refining process for sugar cane manufacture according to claim 1, wherein the process parameters of the continuous chromatographic operation process are: the content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled to be 30-70% (w/w), the operating temperature of the continuous chromatographic device is controlled to be 40-70 ℃, the pH value is controlled to be 5.0-10.0, the mass flow ratio of water inlet to feeding is controlled to be 0.8-2.5, and the mass flow ratio of the sucrose component material flow and the non-sucrose component material flow is 0.8-3.0.

5. A refining process for sugar cane manufacture according to claim 1, wherein the process parameters of the continuous chromatographic operation process are: the content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled to be 50-60% (w/w), the operating temperature of the continuous chromatographic device is controlled to be 50-60 ℃, the pH value is controlled to be 6.0-8.0, the mass flow ratio of water inlet to feeding is controlled to be 1.0-1.8, and the mass flow ratio of the sucrose component material flow and the non-sucrose component material flow is controlled to be 1.2-2.0.

6. A refining process for sugar cane manufacture according to claim 1, wherein the process parameters of the continuous chromatographic operation process are: the content of dry matter in the by-product molasses entering the continuous chromatographic device is controlled at 55% (w/w), the operating temperature of the continuous chromatographic device is controlled at 56 ℃, the pH value is controlled at 6.5, the mass flow ratio of the water inlet to the feed is controlled at 1.4, and the mass flow ratio of the sucrose component outlet stream and the non-sucrose component outlet stream is 1.6.

7. The refining process for sugar production from sugarcane according to claim 1, wherein the continuous chromatography device uses K-type or Na-type cation exchange resin with the particle size of 250-450 μm as a stationary phase, and the mobile phase is a mixed solution of methanol and water; the volume ratio of methanol to water in the mobile phase is 0.0-0.8.

8. The refining process for sugar production from sugarcane according to claim 7, wherein the continuous chromatography device uses K-type or Na-type cation exchange resin with the particle size of 300-450 μm as a stationary phase, and the mobile phase is a mixed solution of methanol and water; the volume ratio of methanol to water in the mobile phase is 0.0-0.3.

9. The refining process for sugar production from sugarcane according to claim 1, wherein 1.5-2.5 wt% of a blending solution is added to the by-product molasses before the by-product molasses enters the continuous chromatographic device to prepare the blended by-product molasses; then the mixed by-product molasses is sent to a continuous chromatographic device for carrying out a continuous chromatographic operation process; the blending solution comprises the following components in parts by weight: 260-300 parts of sterile water, 4.0-5.3 parts of phosphoric acid and 0.3-0.4 part of salt.

10. The refining process for sugar production from sugarcane according to claim 1, wherein 1.8-2.5 wt% of a blending solution is added to the by-product molasses before the by-product molasses enters the continuous chromatographic device to prepare the blended by-product molasses; then the mixed by-product molasses is sent to a continuous chromatographic device for carrying out a continuous chromatographic operation process; the blending solution comprises the following components in parts by weight: 280-300 parts of sterile water, 4.5-5.3 parts of phosphoric acid and 0.35-0.4 part of salt.

Technical Field

The invention relates to the technical field of sugar making processes, in particular to a refining process for making sugar from sugarcane.

Background

Molasses is a byproduct in sugar industry, generally refers to a brown sticky liquid remained after sugar liquid is concentrated to separate out crystal sugar in the sugar making process, the composition of the brown sticky liquid is different due to different sugar making raw materials and processing conditions, and the brown sticky liquid mainly contains a large amount of fermentable sugar (mainly sucrose), so that the brown sticky liquid is a good fermentation raw material, can be used as a substrate or a base material of fermentation products such as yeast, monosodium glutamate, organic acid and the like, and can be used as a raw material of certain foods and animal feeds. It can be divided into cane molasses, beet molasses, starch molasses, etc. according to different sugar-making raw materials. General cane molasses and beet molasses are expressed by converted sugar amount, and total sugar amount is 48.0%, 49.0% respectively; 25.0% of water and 23.0%; crude protein 3.0% and 6.5%.

The sugar production of the sugarcane can adopt a one-step sugar production process or a two-step sugar production process, wherein the one-step sugar production process is to directly obtain a white sugar product by taking the sugarcane as an initial raw material and carrying out the steps of squeezing, impurity removal, clarification, concentration, crystallization, honey separation and the like, and the high-quality white sugar product obtained by the one-step sugar production process has high cost and difficulty and large yield of primary sugar materials, so that the stock pressure is high and the market response is not flexible; compared with the one-step method, the two-step method has the advantages of flexible process, high product quality and the like, is an optimal process for increasingly individualizing, activating and customizing a small amount of current market demands, and is applied and popularized in traditional sugar-making enterprises.

At present, a recrystallization process is commonly adopted for sugar production from sugarcane, on one hand, the recrystallization process needs repeated boiling back of syrup to cause sucrose conversion, on the other hand, sucrose still remains in crystallization mother liquor after multiple crystallization to finally form waste molasses, so product loss is inevitably caused by the utilization of the crystallization process for recovering the sucrose, meanwhile, the boiling back times and time are increased along with the increase of the number of recrystallization stages, the conversion loss of the sucrose is also increased, and the highest yield of the refined sugar-producing sucrose is about 97 percent at present. The two-step process needs two times of recrystallization in two stages of raw sugar production and refined sugar production, so that two times of sucrose loss can be formed, and the overall product yield is further influenced.

Therefore, the improvement of the two-step process is urgently needed to improve the yield of the sucrose. The continuous chromatography has the characteristics of continuous operation, high separation efficiency and high recovery rate, and is widely applied to the sugar production field. The continuous chromatographic technique can be used for partially replacing a recrystallization link in the sugar making process, and the high recovery rate of the sucrose in the sugar refining step is realized.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a sugarcane sugar refining process which takes a technology of separating sucrose in sucrose molasses by using continuous chromatography as a core and is matched with the traditional sugar refining crystallization process, on one hand, sucrose in molasses is completely recovered by chromatography, on the other hand, the number of recrystallization stages is reduced, the sucrose conversion loss caused by repeated sugar boiling is reduced, and the high purity and high yield of sucrose in sucrose molasses are realized.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a refining process for sugar production of sugarcane comprises the following operations: the raw sugar syrup enters a centrifugal honey separator through traditional decoloration and desalination, evaporation and concentration, filtration and impurity removal, sugar boiling and crystallization, crystallization assistance and massecuite distribution, honey separation is realized through the centrifugal honey separator to obtain a refined sucrose product and a byproduct molasses, and the refined sucrose product after honey separation enters subsequent processing and finished product packaging links;

further comprising the following operations:

the by-product molasses enters a continuous chromatographic device, and the conventional recrystallization sucrose recovery process is completely or partially replaced by a continuous chromatographic operation process, so that the separation of sucrose components and non-sucrose components is realized, and the sucrose components and the non-sucrose components are obtained; returning the sucrose component to the front-end decoloring and desalting step, wherein the non-sucrose component does not contain sucrose, and directly treating the non-sucrose component as waste molasses;

the technological parameters of the continuous chromatographic operation process are as follows: the content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled to be 10-80% (w/w), the operating temperature of the continuous chromatographic device is controlled to be 20-90 ℃, the pH value is controlled to be 3.0-12.0, the mass flow ratio of water inlet to feeding is controlled to be 0.5-3.0, and the mass flow ratio of the sucrose component material flow and the non-sucrose component material flow is 0.4-4.0.

Further, the continuous chromatography operation process is required to conform to the continuous chromatography principle, and the continuous chromatography operation process is a conventional simulated moving bed chromatography technology, a sequential simulated moving bed chromatography technology or a continuous ion exchange technology.

Further, the continuous chromatographic operation process is used for replacing the traditional recrystallization sucrose recovery process in whole or in part, and means that the continuous chromatographic operation process can be inserted into any stage of the traditional recrystallization sucrose recovery process.

Further, the process parameters of the continuous chromatographic operation process are as follows: the content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled to be 30-70% (w/w), the operating temperature of the continuous chromatographic device is controlled to be 40-70 ℃, the pH value is controlled to be 5.0-10.0, the mass flow ratio of water inlet to feeding is controlled to be 0.8-2.5, and the mass flow ratio of the sucrose component material flow and the non-sucrose component material flow is 0.8-3.0.

Further, the process parameters of the continuous chromatographic operation process are as follows: the content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled to be 50-60% (w/w), the operating temperature of the continuous chromatographic device is controlled to be 50-60 ℃, the pH value is controlled to be 6.0-8.0, the mass flow ratio of water inlet to feeding is controlled to be 1.0-1.8, and the mass flow ratio of the sucrose component material flow and the non-sucrose component material flow is controlled to be 1.2-2.0.

Further, the process parameters of the continuous chromatographic operation process are as follows: the content of dry matter in the by-product molasses entering the continuous chromatographic device is controlled at 55% (w/w), the operating temperature of the continuous chromatographic device is controlled at 56 ℃, the pH value is controlled at 6.5, the mass flow ratio of the water inlet to the feed is controlled at 1.4, and the mass flow ratio of the sucrose component outlet stream and the non-sucrose component outlet stream is 1.6.

Further, the continuous chromatographic device takes K-type or Na-type cation exchange resin with the granularity of 250-450 mu m as a stationary phase, and a mobile phase is a mixed solution of methanol and water; the volume ratio of methanol to water in the mobile phase is 0.0-0.8.

Further, the continuous chromatographic device takes K-type or Na-type cation exchange resin with the granularity of 300-450 mu m as a stationary phase, and a mobile phase is a mixed solution of methanol and water; the volume ratio of methanol to water in the mobile phase is 0.0-0.3.

Further, before the byproduct molasses enters the continuous chromatographic device, adding 1.5-2.5 wt% of a blending solution into the byproduct molasses to prepare blended byproduct molasses; then the mixed by-product molasses is sent to a continuous chromatographic device for carrying out a continuous chromatographic operation process; the blending solution comprises the following components in parts by weight: 260-300 parts of sterile water, 4.0-5.3 parts of phosphoric acid and 0.3-0.4 part of salt.

Further, before the byproduct molasses enters the continuous chromatographic device, adding 1.8-2.5 wt% of a blending solution into the byproduct molasses to prepare blended byproduct molasses; then the mixed by-product molasses is sent to a continuous chromatographic device for carrying out a continuous chromatographic operation process; the blending solution comprises the following components in parts by weight: 280-300 parts of sterile water, 4.5-5.3 parts of phosphoric acid and 0.35-0.4 part of salt.

The invention relates to a refining process for sugar production from sugarcane, aiming at solving the problems that part of sucrose is converted in repeated back boiling and part of sucrose is lost along with waste molasses and the overall sucrose yield is reduced because a recrystallization process is adopted in the refining step in the traditional two-step method for sugar production from sugarcane; the method takes the technology of separating the sucrose in the sucrose molasses by continuous chromatography as a core, optimizes the technological parameters of the continuous chromatography operation process, replaces the recrystallization link of recovered sugar in the sugar making process by the continuous chromatography technology, and is matched with the traditional sugar making crystallization process, so that on one hand, the sucrose in the molasses is completely recovered by the continuous chromatography separation technology, on the other hand, the recrystallization stages can be reduced, the sucrose conversion loss caused by repeated sugar boiling is reduced, and the sucrose recovery in the refining sugar making process is improved to more than 99 percent.

According to the refining process for sugar production of sugarcane, provided by the invention, the problem of high yield of the byproduct molasses is considered, in the continuous chromatographic operation process, after the number of columns of a continuous chromatographic device is determined, the feeding amount is increased by adopting a mode of increasing the column diameter, so that the processing capacity of the continuous chromatographic device on the byproduct molasses is increased; increasing the column diameter causes radial lag of the flow velocity and uneven distribution of the flow velocity, thereby causing band broadening and deteriorating the separation effect; therefore, before the byproduct molasses enters the continuous chromatographic device, the blending solution is added into the byproduct molasses, the problem of radial lagging of the flow rate caused by increasing the column diameter can be properly relieved through the blending effect of the blending solution, the problem of uneven flow rate distribution is also relieved to a certain extent, the separation effect is improved, and the sucrose recycling in the refining and sugar making process is improved to more than 99.5%.

Drawings

FIG. 1 is a process flow diagram of the two-step process referred to in the background of the invention.

FIG. 2 is a process flow diagram of the process of the present invention.

Detailed Description

The following examples may help one skilled in the art to more fully understand the present invention, but are not intended to limit the invention in any way.

The invention relates to a refining process for sugar production of sugarcane, wherein a continuous chromatographic device is a full-automatic continuous chromatographic separation system.

The invention relates to a refining process for sugar production of sugarcane, which needs to be pointed out as follows: a traditional refined sucrose refining process is shown in figure 1, after raw sugar syrup is desalted, decolored, evaporated, concentrated, filtered, decontaminated and boiled for crystallization, solid sucrose refined sugar and mother liquid containing part of uncrystallized mother liquid are formed through crystallization assistance, solid-liquid separation is carried out on the solid sugar refined sugar and the mother liquid containing part of uncrystallized mother liquid through a massecuite distributor to obtain refined white sugar products and molasses serving as byproducts, the molasses continues to enter next-stage crystallization to form new sucrose solid products and molasses, 5-6-stage recrystallization can be continuously carried out generally, as the impurity enrichment in the molasses at the later stage is gradually increased, the impurities and pigments wrapped by the crystallized sucrose are increased, the quality of the sucrose products is gradually reduced, the sucrose products cannot be used as high-quality products to be mixed with the refined sugar obtained by the first-stage crystallization for sale, the high-stock occupation or the redissolution or the low-price sale is required, and the molasses formed by the last-stage crystallization still contains sucrose, however, since the purity is too low (42-48% of sucrose), it is not possible to recover sucrose again by crystallization, the sucrose having to be disposed of inexpensively as a by-product with molasses; in the technology of the invention: the raw sugar syrup is decolorized by conventional (fixed bed) ion exchange resin, desalted by (fixed bed) mixed ion exchange resin, evaporated and concentrated, filtered to remove impurities and boiled, crystallized, distributed by massecuite, sent to a centrifuge, and centrifuged to realize honey separation, and the refined cane sugar product after honey separation is sent to subsequent processing and finished product packaging links. The original process from ion exchange decoloration, desalination to centrifugal separation is the original flow of the sugar production process, the original process conditions are not required to be changed, and only the original process steps and process parameters are required to be used; different from the traditional refined sucrose refining process shown in figure 1, the other part is molasses, the process enters a chromatographic separation process step, the separation of sucrose components and non-sucrose components, mainly reducing sugars such as fructose, glucose and the like, is realized through the continuous chromatographic operation mode, the recovered sucrose returns to the front-end desalting and decoloring step and is combined with raw sugar syrup to further prepare a sucrose product, and the other separated stream does not contain sucrose and can be treated as waste molasses.

The invention relates to a refining process for sugar production from sugarcane, wherein a continuous chromatographic device adopted is a commercial continuous chromatographic separation device, a specific continuous chromatographic operation mode and equipment can be selected from continuous chromatographic devices reported in the prior literature or commercial continuous chromatographic devices, such as a conventional simulated moving bed chromatographic separation device, a sequential simulated moving bed chromatographic separation device, a continuous ion exchange chromatographic separation device and the like, and related technologies and equipment can refer to academic documents, such as Henner Schmit-Transub, Michael Schulte and Andrea Seidel-Morgensten, a Preparative Chromatography third edition, pages 261 to 290, or foreign manufacturers such as Novasep (Novasep) and domestic manufacturers such as websites and promotional materials of the companies of the Mediterranean photo-biological engineering research institute Limited company, Jiangsu Han technology company and the like. The common characteristic of the devices is that the conventional column chromatography separation technology is combined with the moving bed technology to form a continuous countercurrent separation operation mode, so that the separation effect of the original pure fixed bed column chromatography separation mode is improved, and the technology is industrially applied.

The invention relates to a refining process for sugar production from sugarcane, wherein the adopted continuous chromatographic resin filler can also be commercial chromatographic separation resin filler, the specific resin filler selected by the continuous chromatography can be commercial gel type or macroporous cation exchange resin, the basic skeleton structure is styrene type, the ion form is monovalent metal ion form, such as alkali metal ion, potassium type, sodium type and the like, and the related technical data can refer to the website introduction or product description of foreign manufacturers such as DuPont and Lansheng and domestic manufacturers such as Tbodongda, West An and Suqing water treatment and the like.

The invention relates to a sugar refining process for sugarcane, wherein the development process of the implemented continuous chromatographic operation process is designed and developed based on different continuous chromatographic devices and modes according to theoretical literature and actual scale, and the development process of the specific continuous chromatographic operation process conditions refers to academic literature such as preparation Chromatography third edition and pages 311 to 493 which are edited by Henner Schmit-Trub, Michael Schulte and Andrea Seidel-Morgensen, or technical development publicity materials disclosed by domestic and foreign equipment manufacturers such as Novasep, Shanghai Mega photo-biological engineering design research institute Limited company, Jiangsu Han dynasty science and technology Limited company.

The invention relates to a refining process for sugar production of sugarcane, which has three important points to be protected, namely: the selection of the combination of the crystallization process and the chromatographic process, the conventional refining sugar-making process needs to carry out product preparation and sucrose recovery through a multi-stage recrystallization process, such as a six-stage refining crystallization process, the first-stage crystallization produces refined sugar products, the subsequent five-stage recrystallization carries out sucrose recovery (does not produce products), the continuous chromatographic process can replace the subsequent five-stage recrystallization process to recover sucrose in molasses produced by the first-stage crystallization after the first-stage crystallization produces refined sugar products, can also replace the subsequent four-stage recrystallization process to recover sucrose in molasses produced by the second-stage crystallization after the first-stage crystallization produces refined sugar and the second-stage crystallization recovers sucrose, and can also replace the subsequent three-stage recrystallization process to recover sucrose in molasses produced by the third-stage crystallization after the first-stage crystallization produces refined sugar and the second-stage and third-stage recrystallization recovers sucrose, in the same way, after refined sugar is produced by first-stage crystallization and the sucrose is recovered by all five-stage recrystallization, the sucrose in the molasses produced by the final-stage recrystallization is only recovered without replacing any recrystallization process.

And a second point: certain operating conditions to be controlled in the continuous chromatographic separation process, which are common to the commercial industrial units conforming to the continuous chromatographic mode of operation, such as conventional simulated moving bed chromatographic separation units, sequential simulated moving bed chromatographic separation units, continuous ion exchange chromatographic separation units, and the like, include: the molasses feedstock feed dry matter content controlled by a continuous chromatography unit is in the range of 10% (w/w) to 80% (w/w), preferably 30% (w/w) to 70% (w/w), more preferably 50% (w/w) to 60% (w/w); the operating temperature range controlled by the continuous chromatography device is 20 ℃ to 90 ℃, preferably 40 ℃ to 70 ℃, more preferably 50 ℃ to 60 ℃; the continuous chromatography apparatus is controlled to operate at a pH in the range of 3.0 to 12.0, preferably 5.0 to 10.0, more preferably 6.0 to 8.0; the mass flow ratio of the feed water to the feed material controlled by the continuous chromatography apparatus is in the range of 0.5 to 3.0, preferably 0.8 to 2.5, more preferably 1.0 to 1.8; the continuous chromatography apparatus controls the mass flow ratio of the sucrose component stream to the non-sucrose component stream in the range of 0.4 to 4.0, preferably 0.8 to 3.0, more preferably 1.2 to 2.0.

And a third point: in consideration of the problem of large yield of the by-product molasses, in the continuous chromatographic operation process, when the number of columns of the continuous chromatographic device is determined, the method of increasing the column diameter is generally adopted to increase the feeding amount so as to increase the treatment capacity of the continuous chromatographic device on the by-product molasses; increasing the column diameter causes radial lag of the flow velocity and uneven distribution of the flow velocity, thereby causing band broadening and deteriorating the separation effect; therefore, before the byproduct molasses enters the continuous chromatographic device, the blending solution is added into the byproduct molasses, the problem of radial lag of flow rate caused by increasing the column diameter can be properly relieved through the blending action of the blending solution, the problem of uneven flow rate distribution is also relieved to a certain extent, the separation effect is improved, and the sucrose recycling rate in the refining and sugar making process is improved to more than 99.5%.

Example 1:

a refining process for sugar production of sugarcane comprises the following operations: the raw sugar syrup enters a centrifugal honey separator through traditional decoloration and desalination, evaporation and concentration, filtration and impurity removal, sugar boiling and crystallization, crystallization assistance and massecuite distribution, honey separation is realized through the centrifugal honey separator to obtain a refined sucrose product and a byproduct molasses, and the refined sucrose product after honey separation enters subsequent processing and finished product packaging links;

further comprising the following operations:

sending the by-product molasses into a continuous chromatographic device, and completely or partially replacing the traditional recrystallization sucrose recovery process by a continuous chromatographic operation process to realize the separation of sucrose components and non-sucrose components and obtain the sucrose components and the non-sucrose components; returning the sucrose component to the front-end decoloring and desalting step, wherein the non-sucrose component does not contain sucrose, and directly treating the non-sucrose component as waste molasses; the continuous chromatographic operation process is required to accord with the continuous chromatographic principle, and is a conventional simulated moving bed chromatographic technique, a sequential simulated moving bed chromatographic technique or a continuous ion exchange technique;

the technological parameters of the continuous chromatographic operation process are as follows: the continuous chromatographic device takes Na-type cation exchange resin with the granularity of 250-450 mu m as a stationary phase, and a mobile phase is a mixed solution of methanol and water; the volume ratio of methanol to water in the mobile phase is 0.3, the content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled at 10% (w/w), the operating temperature of the continuous chromatographic device is controlled at 20 ℃, the pH value is controlled at 3.0, the mass flow ratio of water inlet to feed is controlled at 0.5, and the mass flow ratio of the sucrose component material flow outlet and the non-sucrose component material flow outlet is 0.4; namely, the operation process shown in figure 2 is realized by a commercial conventional simulated moving bed chromatographic separation device, and the yield of high-quality refined sugar and the total recovery rate of sucrose are recorded.

Example 2:

a refining process for sugar production of sugarcane comprises the following operations: the raw sugar syrup enters a centrifugal honey separator through traditional decoloration and desalination, evaporation and concentration, filtration and impurity removal, sugar boiling and crystallization, crystallization assistance and massecuite distribution, honey separation is realized through the centrifugal honey separator to obtain a refined sucrose product and a byproduct molasses, and the refined sucrose product after honey separation enters subsequent processing and finished product packaging links;

further comprising the following operations:

firstly, adding 1.5 wt% of a blending solution into the by-product molasses to prepare blended by-product molasses; the blending solution comprises the following components in parts by weight: 260 parts of sterile water, 4.0 parts of phosphoric acid and 0.3 part of salt; sending the blended by-product molasses into a continuous chromatographic device, and completely or partially replacing the traditional recrystallization sucrose recovery process by a continuous chromatographic operation process to realize the separation of sucrose components and non-sucrose components and obtain the sucrose components and the non-sucrose components; returning the sucrose component to the front-end decoloring and desalting step, wherein the non-sucrose component does not contain sucrose, and directly treating the non-sucrose component as waste molasses; the continuous chromatographic operation process is required to accord with the continuous chromatographic principle, and is a conventional simulated moving bed chromatographic technique, a sequential simulated moving bed chromatographic technique or a continuous ion exchange technique;

the technological parameters of the continuous chromatographic operation process are as follows: the continuous chromatographic device takes K-type cation exchange resin with the granularity of 250-450 mu m as a stationary phase, and a mobile phase is a mixed solution of methanol and water; the volume ratio of methanol to water in the mobile phase is 0.3, the content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled at 10% (w/w), the operating temperature of the continuous chromatographic device is controlled at 20 ℃, the pH value is controlled at 3.0, the mass flow ratio of water inlet to feed is controlled at 0.5, and the mass flow ratio of the sucrose component material flow outlet and the non-sucrose component material flow outlet is 0.4; namely, the operation process shown in figure 2 is realized by a commercial conventional simulated moving bed chromatographic separation device, and the yield of high-quality refined sugar and the total recovery rate of sucrose are recorded.

Example 3:

a refining process for sugar production of sugarcane comprises the following operations: the raw sugar syrup enters a centrifugal honey separator through traditional decoloration and desalination, evaporation and concentration, filtration and impurity removal, sugar boiling and crystallization, crystallization assistance and massecuite distribution, honey separation is realized through the centrifugal honey separator to obtain a refined sucrose product and a byproduct molasses, and the refined sucrose product after honey separation enters subsequent processing and finished product packaging links;

further comprising the following operations:

firstly, adding 1.5 wt% of a blending solution into the by-product molasses to prepare blended by-product molasses; the blending solution comprises the following components in parts by weight: 260 parts of sterile water, 4.0 parts of phosphoric acid and 0.3 part of salt; sending the blended by-product molasses into a continuous chromatographic device, and completely or partially replacing the traditional recrystallization sucrose recovery process by a continuous chromatographic operation process to realize the separation of sucrose components and non-sucrose components and obtain the sucrose components and the non-sucrose components; returning the sucrose component to the front-end decoloring and desalting step, wherein the non-sucrose component does not contain sucrose, and directly treating the non-sucrose component as waste molasses; the continuous chromatographic operation process is required to accord with the continuous chromatographic principle, and is a conventional simulated moving bed chromatographic technique, a sequential simulated moving bed chromatographic technique or a continuous ion exchange technique;

the technological parameters of the continuous chromatographic operation process are as follows: the continuous chromatographic device takes Na-type cation exchange resin with the granularity of 250-450 mu m as a stationary phase, and a mobile phase is a mixed solution of methanol and water; the volume ratio of methanol to water in the mobile phase was 0.8

The content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled at 80% (w/w), the operating temperature of the continuous chromatographic device is controlled at 90 ℃, the pH value is controlled at 12.0, the mass flow ratio of water inlet to feed is controlled at 3.0, and the mass flow ratio of the sucrose component material flow and the non-sucrose component material flow is controlled within 4.0; namely, the operation process shown in figure 2 is realized by a commercial conventional simulated moving bed chromatographic separation device, and the yield of high-quality refined sugar and the total recovery rate of sucrose are recorded.

Example 4:

a refining process for sugar production of sugarcane comprises the following operations: the raw sugar syrup enters a centrifugal honey separator through traditional decoloration and desalination, evaporation and concentration, filtration and impurity removal, sugar boiling and crystallization, crystallization assistance and massecuite distribution, honey separation is realized through the centrifugal honey separator to obtain a refined sucrose product and a byproduct molasses, and the refined sucrose product after honey separation enters subsequent processing and finished product packaging links;

further comprising the following operations:

firstly, adding 2.5 wt% of a blending solution into the by-product molasses to prepare blended by-product molasses; the blending solution comprises the following components in parts by weight: 300 parts of sterile water, 5.3 parts of phosphoric acid and 0.4 part of salt; sending the blended by-product molasses into a continuous chromatographic device, and completely or partially replacing the traditional recrystallization sucrose recovery process by a continuous chromatographic operation process to realize the separation of sucrose components and non-sucrose components and obtain the sucrose components and the non-sucrose components; returning the sucrose component to the front-end decoloring and desalting step, wherein the non-sucrose component does not contain sucrose, and directly treating the non-sucrose component as waste molasses; the continuous chromatographic operation process is required to accord with the continuous chromatographic principle, and is a conventional simulated moving bed chromatographic technique, a sequential simulated moving bed chromatographic technique or a continuous ion exchange technique;

the technological parameters of the continuous chromatographic operation process are as follows: the continuous chromatographic device takes K-type cation exchange resin with the granularity of 250-450 mu m as a stationary phase, and a mobile phase is a mixed solution of methanol and water; the volume ratio of methanol to water in the mobile phase is 0.5, the content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled at 60% (w/w), the operating temperature of the continuous chromatographic device is controlled at 50 ℃, the pH value is controlled at 6.0, the mass flow ratio of water inlet to feed is controlled at 1.8, and the mass flow ratio of the sucrose component material flow outlet and the non-sucrose component material flow outlet is 1.2; namely, the operation process shown in figure 2 is realized by a commercial conventional simulated moving bed chromatographic separation device, and the yield of high-quality refined sugar and the total recovery rate of sucrose are recorded.

Example 5:

a refining process for sugar production of sugarcane comprises the following operations: the raw sugar syrup enters a centrifugal honey separator through traditional decoloration and desalination, evaporation and concentration, filtration and impurity removal, sugar boiling and crystallization, crystallization assistance and massecuite distribution, honey separation is realized through the centrifugal honey separator to obtain a refined sucrose product and a byproduct molasses, and the refined sucrose product after honey separation enters subsequent processing and finished product packaging links;

further comprising the following operations:

firstly, adding 2.0 wt% of a blending solution into the by-product molasses to prepare blended by-product molasses; the blending solution comprises the following components in parts by weight: 280 parts of sterile water, 4.5 parts of phosphoric acid and 0.35 part of salt; sending the blended by-product molasses into a continuous chromatographic device, and completely or partially replacing the traditional recrystallization sucrose recovery process by a continuous chromatographic operation process to realize the separation of sucrose components and non-sucrose components and obtain the sucrose components and the non-sucrose components; returning the sucrose component to the front-end decoloring and desalting step, wherein the non-sucrose component does not contain sucrose, and directly treating the non-sucrose component as waste molasses; the continuous chromatographic operation process is required to accord with the continuous chromatographic principle, and is a conventional simulated moving bed chromatographic technique, a sequential simulated moving bed chromatographic technique or a continuous ion exchange technique;

the technological parameters of the continuous chromatographic operation process are as follows: the continuous chromatographic device takes Na-type cation exchange resin with the granularity of 250-450 mu m as a stationary phase, and a mobile phase is a mixed solution of methanol and water; the volume ratio of methanol to water in the mobile phase is 0.2, the content of dry substances in the by-product molasses entering the continuous chromatographic device is controlled at 55% (w/w), the operating temperature of the continuous chromatographic device is controlled at 56 ℃, the pH value is controlled at 6.5, the mass flow ratio of water inlet to feed is controlled at 1.4, and the mass flow ratio of the sucrose component material flow outlet and the non-sucrose component material flow outlet is 1.6; namely, the operation process shown in figure 2 is realized by a commercial conventional simulated moving bed chromatographic separation device, and the yield of high-quality refined sugar and the total recovery rate of sucrose are recorded.

Comparative example 1:

the raw sugar refining device is an industrial device, raw sugar syrup is subjected to steps of desalination, decoloration, evaporation concentration, filtration, impurity removal, sugar boiling, crystallization, centrifugation, honey separation and the like, a product after primary crystallization and honey separation is high-quality refined sugar, molasses after primary crystallization and honey separation enters a subsequent recrystallization step, and the final waste molasses and sucrose products of different grades are formed through five times of recrystallization, but the waste molasses cannot be used as high-quality refined sugar. Namely, the operation process shown in figure 1 is realized by a recrystallization device, and the yield of high-quality refined sugar and the total recovery rate of cane sugar are recorded.

The experimental results in the above examples 1 to 5 and comparative example 1 are shown in the following table 1:

TABLE 1

Test No	High quality refined sugar yield	Total recovery of refined sucrose
			Example 1	98.1%	99.0%
Example 2	97.6%	99.5%
			Example 3	97.5%	99.6%
Example 4	98.0%	99.5%
			Example 5	99.0%	99.7%
Comparative example 1	80.4%	97.2%

From the experimental results in the above examples 1-5 and the comparative example 1, it can be seen that the cane sugar refining process of the present invention uses the technology of continuous chromatographic separation of sucrose from cane sugar molasses as a core, optimizes the process parameters of the continuous chromatographic operation process, replaces the recrystallization link of recovered sugar in the sugar refining process with the continuous chromatographic technology, and is matched with the traditional sugar crystallization process, such that on one hand, sucrose in molasses is completely recovered by the continuous chromatographic separation technology, on the other hand, the number of recrystallization stages can be reduced, the sucrose conversion loss caused by repeated sugar boiling can be reduced, and the sucrose recovery in the refining sugar refining process can be increased to more than 99%; before the byproduct molasses enters the continuous chromatographic device, the blending solution is added into the byproduct molasses, the problem of radial lagging of the flow rate caused by increasing the column diameter can be properly relieved through the blending action of the blending solution, the problem of uneven flow rate distribution is also relieved to a certain extent, the separation effect is improved, and the sucrose recycling in the refining sugar-making process is improved to more than 99.5%.

Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.