阅读说明：本技术 高品质白砂糖的生产方法 (Production method of high-quality white granulated sugar ) 是由 潘文生 陈生 黄正洋 于 2018-12-29 设计创作，主要内容包括：本发明公开了一种高品质白砂糖的生产方法,包括以下步骤：(1)将糖汁进行加热,然后加入石灰乳,调节pH值；(2)向步骤(1)调节pH值后的糖汁进行硫熏中和；(3)向步骤(2)硫熏中和后的糖汁中加入絮凝剂,接着搅拌；(4)接着调节步骤(2)搅拌后的糖汁的pH值,将调节pH值后的糖汁放入沉降池分离出澄清汁和泥汁,泥汁经滤布过滤,所得滤清汁和澄清汁混合,然后蒸发、浓缩,制得糖浆；(5)将步骤(4)制得的糖浆进行煮糖、结晶、分蜜后,制得高品质白砂糖。与现有技术相比,采用本发明的絮凝剂有利于降低浊度和色值,获得纯度更高的糖汁或糖浆,使制备得到的白砂糖品质更高。(The invention discloses a production method of high-quality white granulated sugar, which comprises the following steps: (1) heating the sugar juice, adding lime milk, and adjusting pH value; (2) carrying out sulfitation neutralization on the sugar juice with the pH value adjusted in the step (1); (3) adding a flocculating agent into the sugar juice neutralized by the stoving in the step (2), and then stirring; (4) adjusting the pH value of the sugar juice stirred in the step (2), putting the sugar juice with the adjusted pH value into a sedimentation tank to separate clear juice and mud juice, filtering the mud juice through filter cloth, mixing the obtained filtered juice with the clear juice, and then evaporating and concentrating to obtain syrup; (5) and (4) boiling the syrup prepared in the step (4), crystallizing, and separating honey to prepare the high-quality white granulated sugar. Compared with the prior art, the flocculant provided by the invention is beneficial to reducing turbidity and color value, and obtaining sugar juice or syrup with higher purity, so that the prepared white granulated sugar has higher quality.)

1. A production method of high-quality white granulated sugar is characterized by comprising the following steps:

(1) heating the sugar juice, adding lime milk, and adjusting pH value;

(2) carrying out sulfitation neutralization on the sugar juice with the pH value adjusted in the step (1);

(3) adding a flocculating agent into the sugar juice neutralized by the sulfitation in the step (2), adjusting the pH value to be 6.5-7.9, and then stirring for 7-10min at the rotating speed of 200-300 r/min; the flocculant comprises the following raw materials: activated carbon, carboxymethyl deacetylated chitin, sodium polyglutamate, zeolite, polyglycerol fatty acid ester, nanocellulose crystal, and vinyltris (beta-methoxyethoxy) silane;

the weight ratio of the carboxymethyl deacetylated chitin, the sodium polyglutamate, the zeolite, the polyglycerol fatty acid ester, the nano cellulose crystal and the vinyl tri (beta-methoxyethoxy) silane is (0.7-1.2), (0.5-0.9), (1-2), (0.3-0.8), (0.4-0.6) and (0.1-0.2);

(4) adjusting the pH value of the sugar juice stirred in the step (2) to 6.9-7.6, putting the sugar juice with the adjusted pH value into a sedimentation tank to separate clear juice and mud juice, filtering the mud juice through filter cloth, mixing the obtained filtered juice and the clear juice, and then evaporating and concentrating to obtain syrup;

(5) and (4) boiling the syrup prepared in the step (4), crystallizing, and separating honey to prepare the high-quality white granulated sugar.

2. A method of producing high quality white granulated sugar according to claim 1, wherein the sugar juice in step (1) is heated at 60-75 ℃.

3. The method for producing high-quality white granulated sugar according to claim 1, wherein the concentration of the lime milk in the step (1) is 5-12 ° Be.

4. The method for producing high-quality white granulated sugar according to claim 1, wherein the pH value in step (1) is 6.5 to 7.3.

5. The production method of high-quality white granulated sugar according to claim 1, wherein the sulphur fumigation in step (2) is performed with a medium sulphur arsenic content: arsenic (As) mg/kg is less than or equal to 1 percent.

6. The method for producing high-quality white granulated sugar according to claim 5, wherein the intensity of sulfitation neutralization is 17-28 ml.

7. The method for producing high-quality white granulated sugar according to claim 1, wherein the addition amount of the flocculant in the step (3) is 2-5 ppm.

8. The production method of high-quality white granulated sugar according to claim 7, characterized in that the flocculant comprises the following raw materials in parts by weight: 3-5 parts of activated carbon, 0.7-1.2 parts of carboxymethyl deacetylated chitin, 0.5-0.9 part of sodium polyglutamate, 1-2 parts of zeolite, 0.3-0.8 part of polyglycerol fatty acid ester, 0.4-0.6 part of nano cellulose crystal and 0.1-0.2 part of vinyl tri (beta-methoxyethoxy) silane.

9. The production method of high-quality white granulated sugar according to claim 8, characterized in that the flocculant comprises the following raw materials in parts by weight: 4.2 parts of activated carbon, 1 part of carboxymethyl deacetylated chitin, 0.8 part of sodium polyglutamate, 1.6 parts of zeolite, 0.7 part of polyglycerol fatty acid ester, 0.5 part of nano cellulose crystal and 0.1 part of vinyl tri (beta-methoxy ethoxy) silane.

10. The method for producing high-quality white granulated sugar according to any one of claims 1 and 7 to 9, wherein the method for preparing the flocculating agent comprises the following steps:

(a) washing activated carbon and zeolite with water, drying until the water content is less than or equal to 2%, crushing, and sieving with a 300-400-mesh sieve to obtain a crushed material;

(b) adding polyglycerol fatty acid ester and vinyl tri (beta-methoxyethoxy) silane into the crushed material prepared in the step (a), stirring and heating to 40-50 ℃ at the rotation speed of 200-;

(c) adding carboxymethyl deacetylated chitin into the mixture A prepared in the step (B), stirring and heating to 55-60 ℃ at the rotation speed of 200-;

(d) adding sodium polyglutamate and nano cellulose crystals into the mixture B prepared in the step (C), stirring and cooling to 42-48 ℃ at the rotating speed of 200-300r/min, and preserving heat for 1.8-2.5h to prepare a mixture C;

(e) and (d) drying the mixture C prepared in the step (d) at 35-38 ℃ in vacuum to constant weight to prepare the flocculant.

Technical Field

The invention belongs to the technical field of sugar production, and particularly relates to a production method of high-quality white granulated sugar.

Background

Sugar is one of the necessities of life of people and is also an important strategic reserve material of the country. The sulfurous acid method, the carbonic acid method and the two-step method (namely, the raw sugar is produced first and then refined to produce the raw sugar) are commonly adopted in the sugarcane sugar industry production in the world at presentWhite granulated sugar), wherein the first two production processes are mainly adopted in China, and the two-step process is mainly used in countries such as Australia, Guba, Brazil and the like. The white granulated sugar produced by the carbonic acid method has better quality and lower residual sulfur content, and is generally 10 mg/kg^-1The production cost is high, and the produced filter mud is easy to absorb carbon dioxide in the air to generate calcium carbonate, is hard and cannot be utilized, and causes serious environmental pollution, so that the carbon method process is difficult to popularize; although the two-step process can produce white granulated sugar with excellent quality, the production process is long, the energy consumption is high, the investment and the production cost are high, and the white granulated sugar is difficult to be accepted by sugar manufacturing enterprises in developing countries (including China); at present, in developing countries, particularly China and some countries in Asia, the white granulated sugar in arable land is mainly produced by a sulfurous acid method. The production process has a history of decades in China, the flow and equipment are simple, and other quality indexes can basically reach the level of a carbonic acid method except high sulfur content of the product, so that the production process still takes a leading position in the sugar production of the sugarcane at present. On the other hand, with the improvement of living standard and consumption level of people, the quality requirement of white granulated sugar is higher and higher, the quality standard of white granulated sugar is also improved in China, the amount of white sugar used for manufacturing high-grade beverages is about 150 ten thousand tons each year, 25 ten thousand tons of can sugar, 20 ten thousand tons of preserved fruit sugar and 20 ten thousand tons of pharmaceutical sugar are used in China, and refined sugar and high-quality sugar are gradually required to be used. However, the sulfurous acid method has high residual sulfur content, the product is easy to get damp and turn yellow, and is rejected by large and medium-sized food and beverage enterprises, and the market competitiveness is gradually reduced, which becomes a difficult problem in the sugar industry of sugarcane. For many years, many scientific research departments and enterprises put a lot of efforts into research aiming at the defects of the sulfurous acid method process, and hope to find a method capable of efficiently removing impurities such as pigments, proteins, starch and the like at low cost in the process of clarifying sugar juice or syrup, so that the purity of the sugar juice or syrup is improved, and the color value is reduced. The method optimizes the product structure for reducing the sugar production cost, realizes the simple and economic method to solve the problem of difficult improvement of the product quality in the sugar industry, fundamentally changes the current situation that the production process and production equipment of the sulfurous acid method can not produce refined sugar and high-quality beverage sugar, and realizes the sulfurous acid method of a sugar refineryThe replacement of the process or the upgrading of the product plays an important role.

Disclosure of Invention

The invention aims to provide a production method of high-quality white granulated sugar, which aims to solve the practical technical problems of high turbidity and high color value of sugar juice or syrup.

In order to solve the technical problems, the invention adopts the following technical scheme:

a production method of high-quality white granulated sugar comprises the following steps:

(1) heating the sugar juice, adding lime milk, and adjusting pH value;

(2) carrying out sulfitation neutralization on the sugar juice with the pH value adjusted in the step (1);

(3) adding a flocculating agent into the sugar juice neutralized by the sulfitation in the step (2), adjusting the pH value to be 6.5-7.9, and then stirring for 7-10min at the rotating speed of 200-300 r/min; the flocculant comprises the following raw materials: activated carbon, carboxymethyl deacetylated chitin, sodium polyglutamate, zeolite, polyglycerol fatty acid ester, nanocellulose crystal, and vinyltris (beta-methoxyethoxy) silane;

the weight ratio of the carboxymethyl deacetylated chitin, the sodium polyglutamate, the zeolite, the polyglycerol fatty acid ester, the nano cellulose crystal and the vinyl tri (beta-methoxyethoxy) silane is (0.7-1.2), (0.5-0.9), (1-2), (0.3-0.8), (0.4-0.6) and (0.1-0.2);

(4) adjusting the pH value of the sugar juice stirred in the step (2) to 6.9-7.6, putting the sugar juice with the adjusted pH value into a sedimentation tank to separate clear juice and mud juice, filtering the mud juice through filter cloth, mixing the obtained filtered juice and the clear juice, and then evaporating and concentrating to obtain syrup;

(5) and (4) boiling the syrup prepared in the step (4), crystallizing, and separating honey to prepare the high-quality white granulated sugar.

Further, the sugar juice in step (1) is heated at 60-75 ℃.

Further, the concentration of the lime milk in the step (1) is 5-12 degrees Be.

Further, the pH value in the step (1) is 6.5-7.3.

Further, the sulfur fumigation in the step (2) is performed to neutralize the content of arsenic sulfur: arsenic (As) mg/kg is less than or equal to 1 percent.

Further, the intensity of stoving neutralization is 17-28 ml.

Further, the addition amount of the flocculating agent in the step (3) is 2-5 ppm.

Further, the flocculant comprises the following raw materials in parts by weight: 3-5 parts of activated carbon, 0.7-1.2 parts of carboxymethyl deacetylated chitin, 0.5-0.9 part of sodium polyglutamate, 1-2 parts of zeolite, 0.3-0.8 part of polyglycerol fatty acid ester, 0.4-0.6 part of nano cellulose crystal and 0.1-0.2 part of vinyl tri (beta-methoxyethoxy) silane.

Further, the flocculant comprises the following raw materials in parts by weight: 4.2 parts of activated carbon, 1 part of carboxymethyl deacetylated chitin, 0.8 part of sodium polyglutamate, 1.6 parts of zeolite, 0.7 part of polyglycerol fatty acid ester, 0.5 part of nano cellulose crystal and 0.1 part of vinyl tri (beta-methoxy ethoxy) silane.

Further, the preparation method of the flocculant comprises the following steps:

(a) washing activated carbon and zeolite with water, drying until the water content is less than or equal to 2%, crushing, and sieving with a 300-400-mesh sieve to obtain a crushed material;

(b) adding polyglycerol fatty acid ester and vinyl tri (beta-methoxyethoxy) silane into the crushed material prepared in the step (a), stirring and heating to 40-50 ℃ at the rotation speed of 200-;

(c) adding carboxymethyl deacetylated chitin into the mixture A prepared in the step (B), stirring and heating to 55-60 ℃ at the rotation speed of 200-;

(d) adding sodium polyglutamate and nano cellulose crystals into the mixture B prepared in the step (C), stirring and cooling to 42-48 ℃ at the rotating speed of 200-300r/min, and preserving heat for 1.8-2.5h to prepare a mixture C;

(e) and (d) drying the mixture C prepared in the step (d) at 35-38 ℃ in vacuum to constant weight to prepare the flocculant.

The invention has the following beneficial effects:

(1) compared with the prior art, the flocculant provided by the invention is beneficial to reducing turbidity and color value, and obtaining sugar juice or syrup with higher purity, so that the prepared white granulated sugar has higher quality.

(2) Carboxymethyl deacetylation chitin, sodium polyglutamate, zeolite, polyglycerol fatty acid ester, nano cellulose crystal and vinyl tri (beta-methoxy ethoxy) silane play a synergistic role in preparing the flocculating agent, and the turbidity and the color value are synergistically reduced.

Detailed Description

In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.

In an embodiment, the production method of the high-quality white granulated sugar comprises the following steps:

(1) heating the sugar juice at 60-75 deg.C, adding 5-12 ° Be lime milk, and adjusting pH to 6.5-7.3;

(2) and (3) carrying out sulfitation neutralization on the sugar juice with the pH value adjusted in the step (1), wherein the content of sulfur and arsenic is as follows: arsenic (As) mg/kg is less than or equal to 1 percent, and the intensity of sulfitation is 17-28 ml;

(3) adding a flocculating agent into the sugar juice neutralized by the stoving in the step (2), wherein the addition amount of the flocculating agent is 2-5ppm, the pH value is adjusted to 6.5-7.9, and then stirring for 7-10min at the rotation speed of 200-300 r/min;

the flocculant comprises the following raw materials in parts by weight: 3-5 parts of activated carbon, 0.7-1.2 parts of carboxymethyl deacetylated chitin, 0.5-0.9 part of sodium polyglutamate, 1-2 parts of zeolite, 0.3-0.8 part of polyglycerol fatty acid ester, 0.4-0.6 part of nano cellulose crystal and 0.1-0.2 part of vinyl tri (beta-methoxyethoxy) silane;

the preparation method of the flocculant comprises the following steps:

(a) washing activated carbon and zeolite with water, drying until the water content is less than or equal to 2%, crushing, and sieving with a 300-400-mesh sieve to obtain a crushed material;

(b) adding polyglycerol fatty acid ester and vinyl tri (beta-methoxyethoxy) silane into the crushed material prepared in the step (a), stirring and heating to 40-50 ℃ at the rotation speed of 200-;

(c) adding carboxymethyl deacetylated chitin into the mixture A prepared in the step (B), stirring and heating to 55-60 ℃ at the rotation speed of 200-;

(d) adding sodium polyglutamate and nano cellulose crystals into the mixture B prepared in the step (C), stirring and cooling to 42-48 ℃ at the rotating speed of 200-300r/min, and preserving heat for 1.8-2.5h to prepare a mixture C;

(e) vacuum drying the mixture C prepared in the step (d) at 35-38 ℃ to constant weight to prepare a flocculating agent;

(4) adjusting the pH value of the sugar juice stirred in the step (2) to 6.9-7.6, putting the sugar juice with the adjusted pH value into a sedimentation tank to separate clear juice and mud juice, filtering the mud juice through filter cloth, mixing the obtained filtered juice and the clear juice, and then evaporating and concentrating to obtain syrup;

(5) and (4) boiling the syrup prepared in the step (4), crystallizing, and separating honey to prepare the high-quality white granulated sugar.

The present invention is illustrated by the following more specific examples.