A Sugar Production Process Using Boiler Flue Gas as Clarifying Agent
A boiler flue and flue gas technology, applied in the application, sugar products, sucrose production and other directions, can solve the problems of polluting the environment, high operating cost of lime kiln, poor environmental protection effect, etc., to reduce residues and shorten sugar cooking time , the effect of reducing the content of sulfur
Active Publication Date: 2016-02-17
GUANGXI LAIBIN YONGXIN SUGAR IND CO LTD
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Problems solved by technology
Therefore, the lime kiln used in the carbonation process not only has high operating costs, but also pollutes the environment and has poor environmental protection effect.
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Embodiment 1
[0024] Raw sugarcane is crushed by a tearing machine and then sent to a press with a cane conveyor for pressing. In the process of pressing, osmotic water is added to squeeze out as much sugar as possible from the sugarcane, and mixed juice is obtained by pressing. Lime is added to the mixed juice Milk, the amount added is 0.1% to sugarcane ratio, the pH value is adjusted to 7.5-8.0, and then heated to 70-75°C for the first time, the pressed bagasse is sent to the boiler as fuel through the conveyor belt, and the remaining bagasse is packaged for delivery . Collect the flue gas produced by boiler combustion, the temperature is 150-165°C, pre-treat the flue gas, remove the dust in the flue gas, and then concentrate and purify the flue gas, the flue gas obtained after the treatment is With a mixed gas with a carbon dioxide volume ratio of 24%, the temperature of the flue gas is reduced to 70-85°C, and at the same time, the waste heat generated when the flue gas is cooled is reco...
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The invention relates to a sugaring process which comprises the following steps: (1) conducting purification and concentration on boiler flue gas to obtain flue gas containing 20%-30% of carbon dioxide by volume; (2) introducing the flue gas to a mixed liquid in which lime cream is added, wherein the volume of the introduced flue gas is 20%-30% of the total volume of the flue gas obtained in step (1) according to volume ratio; (3) adding lime cream into the mixed liquid, smoking sulfur for neutralization to obtain a neutralized liquid, and introducing the flue gas to the neutralized liquid, wherein the volume of the introduced flue gas is 50%-70% of the total volume of the flue gas obtained in step (1) according to volume ratio; (4) processing the neutralized liquid to obtain syrup, and introducing the flue gas to the syrup, wherein the volume of the introduced flue gas is 10%-20% of the total volume of the flue gas obtained in step (1) according to volume ratio. Adopting the processing method, white granulated sugar which is relatively low in sulfur content can be obtained, and energy consumption is reduced while purity and product quality are improved.
Description
technical field [0001] The invention relates to a method for sugar production by sulfurous acid method, in particular to a sugar production process using boiler flue gas as a clarifying agent. Background technique [0002] At present, lime, phosphoric acid and sulfur dioxide are generally used as the main clarifiers in the sulfite sugar production process, and the clarification process of mixed juice and syrup is completed through steps such as adding lime, sulfur fumigation, neutralization, and precipitation separation. Due to the use of a large amount of auxiliary materials such as sulfur and phosphoric acid in the clarification process of mixed juice and syrup, the white granulated sugar produced has high sulfur content, low quality, easy to change color, and is not durable for storage. Over the years, there have been many studies on the clarification process of mixed juice and syrup, and many theories and techniques have been proposed, but the basic process has not chang...
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IPC IPC(8): C13B50/00C13B20/10
Inventor 黄雄军温亦钦罗焕祥罗军陆业晟苏保苏识沣韦国权
Owner GUANGXI LAIBIN YONGXIN SUGAR IND CO LTD