High-quality cleaning method for sugar juice

Abstract

The invention belongs to the technical field of sugar making industries, and discloses a high-quality cleaning method for sugar juice, in particular to a high-quality cleaning method for sugar juice used for producing a low-acidity floccule. The sugar juice is firstly pre-limed and heated, and then subjected to low-temperature gas flotation clarification, flotation clarification sugar juice is subjected to stoving and neutralization after being heated again, and after the stoving and neutralization sugar juice is subjected to full-juice filtering treatment, the sulfur-free cleaning process ofthe sugar juice is completed. According to the high-quality cleaning method, low-temperature strong alkali treatment, stoving and neutralization, and then full-juice filtering of the sugar juice are mainly adopted, the physical and chemical features of non-sugar ingredients in the sugar juice are fully utilized, agglomerations of the non-sugar ingredients are removed to the greatest extent, and efficient cleaning treatment of the sugar juice is achieved; the method is simple in equipment process, automatic continuous production is facilitated, the production efficiency is significantly improved, the obtained clear sugar juice is high in quality and better than clear sugar juice obtained through a traditional sulfurous method, and the cleaning method has a great application prospect.

Description

technical field [0001] The invention belongs to the technical field of the sugar industry, and in particular relates to a high-quality cleaning method for sugar juice, in particular to a high-quality cleaning method for sugar juice used for producing high-quality white sugar (low-acid floc) for beverages. Background technique [0002] At present, the sugar industry mainly adopts three processes to produce farmland white sugar, namely, carbonic acid method, sulfurous acid method and raw sugar refining method. Carbonation sugar production process: due to the production of a large amount of alkaline CaCO 3 Filtration mud is difficult to deal with, and the discharge volume is large, causing pollution to the environment, which limits its application. Sulfurous acid sugar production process: There are problems such as long-term storage of sugar, high content of ash and insoluble impurities, and high risk of acidic flocs, which affect its application in carbonated beverages, medic...

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Problems solved by technology

[0004] Chinese patent 00114236.4 discloses a new process for cleaning low-temperature phosphorus floating sugar juice. After the sugar juice is preashed to pH 7.0 and heated to 40-60°C, phosphoric acid, lime milk, a small amount of formaldehyde, micro-bubbles and flocculants are added. Air flotation clarification treatment, followed by conventional carbonation or sulfite sugar production process, can produce high-grade white granulated sugar, but the removal rate of organic acids, colloids, pigments and other non-sugars is low under neutral conditions; Chinese patent (application number) 200510035131.4 discloses a process for directly producing high-quality white sugar from sugarcane. The first step of the process is low-temperature phosphorus flotation, and the second step is clarification with sulfurous acid decolorizer, carbonation saturated phosphorus flotation and electrolysis. A kind of sugar juice cleaning, this method utilizes the coagulation characteristic of protein in the low-temperature acidic solution, but the organic acid in the sugar juice, the decomposition product of reducing sugar, pectin and other non-sugars do not generate precipitation under acidic conditions; Chinese patent (application No.) 200610048758.8 discloses a method of using high-efficiency activated carbon for sugar to improve the sulfurous acid sugar production process to produce desulfurized sugar. It adds high-efficiency activated carbon for sugar to the clear juice obtained by clarification treatment by the ordinary sulfurous acid method, and then undergoes pressure filtration after adsorption and desulfurization. , Fine filtration to get better quality clear sugar juice, used to produce desulfurized sugar, the color value, turbidity, SO 2 and other indicators can be controlled within a range superior to the national first-class standard; Chinese Patent (Application No.) 200710201374. ℃) to carry out rapid floatation treatment on sugarcane juice; Chinese Patent (Application No.) 201210257567.8 discloses a carbon-based sulfur-free white sugar method for resource recycling, in which the raw sugarcane juice only adds flocculant and then settles at low temperature and high speed— - Heating, adding phosphoric acid, flocculant, bactericide, lime milk, acidic air flotation clarification - adding lime milk to the floating clear juice, heating to 103 ~ 105 ° C, high-temperature carbonation of alkaline sugar juice, to obtain clean sugar juice , to produce sulfur-free white sugar; Chinese Patent (Application No.) 201310082816.9 discloses a clarification method for sugarcane juice, which uses a part of the mixed juice to make foam, float and clear the separation method. The floating clear juice is processed in the first step, and the remaining part of the mixed juice is mixed with the floating clear juice, and then the clear juice is obtained through secondary heating, sulfur smoke neutralization, neutralized juice heating, and rapid sedimentation, which can reduce the residence time of cane juice and increase the non-sugar content high removal rate, stabilize the pH value of the clear juice, avoid the phenomenon of "bottom inversion" and "sucrose conversion" in the sedimentation tank, save production costs, reduce environmental pollution, and improve product quality; Chinese patent 201510435534.1 discloses a two-stage phosphorus floating sulfur-free sugar production The production process, the quality of the clear juice has reached the current traditional sulfite process, but the temperature of the first flotation of the sugar juice is high, and the starch, colloid and other non-sugar components in it are dissolved out, which will still cause the appearance of acidic flocs in white sugar products

[0005] Although the above prior art has achieved good results, the clarification of sugar juice or the treatment of scum / sludge are all carried out at a higher temperature, resulting in the dissolution of non-sugar components such as starch and colloid in the sugar juice, and the product quality is in the high-end industry. The application is affected by acidic flocs to a certain extent. Therefore, the field of sugar production urgently needs to develop a kind of high-quality white sugar that can meet the requirements of my country's cultivated land white sugar production—especially the sugar juice produced by high-quality white sugar produced by low-acid flocs. High-quality cleaning method, solves the problems existing in the above technologies, and changes the shortcomings of the traditional carbonic acid or sulfurous acid process

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