阅读说明：本技术 制糖过程中离子交换树脂的再生方法 (Regeneration method of ion exchange resin in sugar production process ) 是由 邹传军 于 2020-12-08 设计创作，主要内容包括：本发明公开了一种制糖过程中离子交换树脂的再生方法,该方法首先糖汁经过离子交换树脂脱钙后,进入普通的浓缩、煮糖工艺,得到蔗糖和糖蜜；糖蜜经过过滤、色谱分离,得到蔗糖和非糖组分；将上述非糖组分作为再生剂用于上述脱钙处理软化的离子交换树脂再生。本发明使用制糖产生的糖蜜,经过处理后再生树脂,避免了使用其他再生剂,即减少了成本,也减少了污染物的产生。(The invention discloses a regeneration method of ion exchange resin in the sugar making process, firstly, the sugar juice enters the common concentration and sugar boiling processes after being decalcified by the ion exchange resin to obtain cane sugar and molasses; filtering and carrying out chromatographic separation on the molasses to obtain sucrose and non-sugar components; the non-sugar component is used as a regenerant for regenerating the ion exchange resin softened by the decalcification treatment. The invention uses the molasses generated in sugar production, and regenerates the resin after treatment, thereby avoiding the use of other regenerants, reducing the cost and reducing the generation of pollutants.)

1. A method for regenerating ion exchange resin in the sugar manufacturing process is characterized in that: the method comprises the following steps:

1) after the sugar juice is decalcified by ion exchange resin, common concentration and sugar boiling processes are carried out to obtain sugar and molasses;

2) filtering and separating the molasses by chromatography to obtain sugar and non-sugar components; wherein the non-sugar component contains a pigment, an organic macromolecule and a salt;

3) the non-sugar component is used as a regenerant for regenerating the ion exchange resin softened by the decalcification treatment.

2. The method for regenerating ion exchange resin in sugar manufacturing process according to claim 1, wherein: in the step 1), the ion exchange resin is a sodium type ion exchange resin or a potassium type ion exchange resin.

Technical Field

The invention relates to the field of sugar production, in particular to a regeneration method of ion exchange resin in a sugar production process.

Background

Sugar is the most important carbohydrate source for human beings, the commonly used sugar-making raw materials are sugar cane and sugar beet, the commonly used production process is squeezing sugar cane or boiling sugar beet in water to obtain sugar juice, filtering to remove impurities, adding a proper amount of lime water into the filtrate, filtering again to remove precipitates, introducing carbon dioxide into the filtrate to precipitate the lime water into calcium carbonate, and filtering again to obtain the filtrate which is the aqueous solution of sugar, wherein the concentration is generally 10-20%. The sugar solution is put into a vacuum container for reduced pressure evaporation, concentration and cooling, reddish brown slightly sticky crystals are separated out, and the sugar is the sugar, and sticky molasses which cannot be crystallized is obtained. Because sugar cane and beet are crops, the obtained sugar juice contains a lot of salt, and lime is used for processing the sugar juice in the sugar making process, so that the calcium content of the sugar juice is very high, and a large amount of calcium-containing compound precipitates, namely the scale formation which is often called in the subsequent evaporation and concentration stages can be generated. After the equipment is scaled, the heat exchange efficiency of the equipment can be influenced, and the heat energy consumption is increased. In order to solve this problem, sugar factories generally perform decalcification treatment, that is, removal of most of calcium ions from sugar solutions by using ion exchange resins, before concentrating the sugar solutions.

The prior art has the defects that: after the ion exchange resin is saturated, the resin needs to be regenerated, namely, calcium ions absorbed by the resin are removed, and the conventional regeneration methods all use NaOH and NaCL, so that the regeneration liquid is high in cost, and a large amount of waste water is generated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a method for regenerating ion exchange resin in a sugar manufacturing process.

In order to achieve the purpose, the invention designs a method for regenerating ion exchange resin in a sugar manufacturing process, which comprises the following steps:

1) after the sugar juice is decalcified by ion exchange resin, the sugar juice enters common concentration and sugar boiling processes to obtain sugar and molasses, wherein the molasses contains about 60 percent of sugar and a large amount of salt;

2) filtering and separating the molasses by chromatography to obtain sugar and non-sugar components; wherein the non-sugar component comprises pigments, organic macromolecules and salts (including a plurality of K, Na ions);

3) the non-sugar component is used as a regenerant for regenerating the ion exchange resin softened by the decalcification treatment.

Further, in the step 1), the ion exchange resin is a sodium type ion exchange resin or a potassium type ion exchange resin.

The principle of the invention is as follows:

1. firstly, softening sugar juice extracted in the sugar making process by sodium type (potassium type) ion exchange resin, namely replacing calcium ions with sodium ions and potassium ions; the reaction formula is as follows:

2(R-SO₃Na)+→Ca²⁺2(R-SO₃)₂Ca²⁺⁺2Na⁺

r represents the structure of the resin, which can be other monovalent ions, such as potassium ions;

2. the chromatographic separation process utilizes different distribution coefficients of different substances in a system consisting of a stationary phase and a mobile phase, and when the two phases move relatively, the substances move along with the mobile phase and are repeatedly distributed between the two phases, so that the substances are separated. The stationary phase of the separation process is strong acid cation exchange resin. The mobile phase is pure water.

The molasses is subjected to chromatographic separation. To obtain sugar component and non-sugar component. The non-sugar components comprise all pigments, organic macromolecules and salts in the sugar solution; and the salt content contains a large amount of K, Na ions.

The above-mentioned non-sugar component is used as a regenerant for the above-mentioned softening resin to regenerate the softening resin and restore the adsorption function of the resin.

2(R-SO₃)₂Ca²⁺⁺→2Na⁺(R-SO₃Na)+Ca²⁺。

The invention has the beneficial effects that:

the invention uses the sucrose produced by sugar production, and the resin is regenerated after treatment, thereby avoiding the use of other regenerants, reducing the cost and reducing the production of pollutants.

Detailed Description

The present invention is described in further detail below with reference to specific examples so as to be understood by those skilled in the art.

Example 1

The regeneration method of the ion exchange resin in the sugar manufacturing process comprises the following steps:

1) after the sugar juice is decalcified by a sodium type ion exchange tree or a potassium type ion exchange tree, the sugar juice enters a common concentration and sugar boiling process to obtain sugar and molasses;

2) filtering and separating the molasses by chromatography to obtain sugar and non-sugar components; wherein the non-sugar component comprises pigments, organic macromolecules and salts (including a plurality of K, Na ions);

3) the non-sugar component is used as a regenerant for regenerating the ion exchange resin softened by the decalcification treatment.

Other parts not described in detail are prior art. Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.