Method and equipment for clarifying cane juice by combining air floatation purification and thermal floatation purification

Abstract

The invention discloses a method for clarifying cane juice by combining air floatation purification and thermal floatation purification. The method comprises the following steps of: preheating mixed juice to 45-55 DEG C, conveying into a reactor, and adding lime for adjusting the pH value to 5.6-6.6, wherein the adding amount of the lime is 0.02-0.05 percent of the weight of the mixed juice; and charging fine uniform air bubbles by using a bubble maker, adding a flocculating agent, mixing uniformly, adding into a thermal tubular purifier, performing air floatation purification in the thermal tubular purifier to obtain primary clear juice, extracting the primary clear juice into a stirrer, adding a clarifying agent and a flocculating agent simultaneously, and feeding into the thermal tubular purifier through a circulating pump for performing thermal floatation purification to separate secondary clear juice and floating slag out. An air floatation purification technology and a thermal floatation purification technology are combined, so that the clarifying efficiency and effect of the clarifying agent are increased, the quality of a white sugar product is improved simultaneously, and environmental pollution caused by lime sludge is lowered.

Description

technical field [0001] The invention relates to an improvement of a sugar cane sugar making process, in particular to a method and equipment for clarification of cane juice combining air flotation cleaning and hot flotation cleaning. Background technique [0002] With the development of social economy and the improvement of people's living standards, food safety issues are attracting unprecedented attention from the society, and the quality control and supervision of food are becoming more and more strict. As an indispensable food in people's life, white granulated sugar has higher and higher quality requirements. my country's new white sugar standard GB317-2006 has been officially promulgated and implemented, and the quality requirements for white sugar have been greatly improved, mainly in terms of color value and sulfur dioxide indicators. In the face of the implementation of the new standard, some factories are not well prepared, and the product quality cannot keep up w...

AI Technical Summary

Problems solved by technology

[0017] "Low Temperature Phosphorus Float - A New Process for Sugar Production in the 21st Century" (Huo Hanzhen, "Guangxi Light Industry", Issue 1, 2001, 21-26) , mentioned the cylindrical floater and the parallel floater. The main disadvantage of the cylindrical floater is that the scum floats upwards and the clear liquid flows downwards. The two move in reverse, and there is obvious interference, which greatly reduces the Separation speed; and the advection float cleaner effectively solves this problem, eliminates this interference, greatly improves the speed and efficiency of the two-phase separation process, and shortens the required time

[0018] However, the application of the above-mentioned flotation device is relatively single, and the air flotation equipment is only used for cleaning syrup or filtered juice, and is less used for cleaning thin mixed juice. Hot flotation equipment is only used in brown sugar factories

The two float cleaners reported above are all air-floating float cleaners. The buoyancy of the condensate floating up comes from the mechanical filling of "bubbles", and the cleaning process is relatively simple.

There is no report on the combination of air flotation equipment and thermal flotation equipment

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