Automatic acid preparation method and device for phosphoric acid in sugar refinery

Abstract

The invention relates to an automatic acid preparation method and an automatic acid preparation device for phosphoric acid in a sugar refinery. The method comprises the following steps of: firstly, pumping concentrated phosphoric acid into a dilute phosphoric acid proportioning tank by starting a concentrated phosphoric acid pump through a control host, controlling the liquid level of the concentrated phosphoric acid in the dilute phosphoric acid proportioning tank, adding proportioning water, utilizing the control host to open an acid discharge solenoid valve so as to discharge proportioned dilute phosphoric acid into a dilute phosphoric acid storage tank for production standby, adopting a liquid indicator for the dilute phosphoric acid storage tank for continuously measuring the liquid level in the dilute phosphoric acid storage tank in real time, and utilizing the control host to accurately control the amount of phosphoric acid added to sugarcane juice according to the flow of the sugarcane juice, the dilution value of the phosphoric acid and the phosphoric acid added to the sugarcane juice, thereby solving the problem of inaccuracy resulted from artificial phosphoric acid proportioning of sugar refinery in the prior art, realizing the automatic phosphoric acid proportioning of the sugar refinery, ensuring the accuracy, timeliness and stability of adding of the phosphoric acid, and improving the efficiency of enterprises.

Description

technical field [0001] The invention belongs to the field of automatic control of chemical industry, light industry and food production process, in particular to a method and device for automatically mixing phosphoric acid in a sugar factory. Background technique [0002] Phosphoric acid is a raw material often used in chemical industry, light industry and food production process. It is mainly used to adjust the acidity of materials, and some are used as clarifiers. The clarification process is to use the insoluble characteristics of some organic substances such as sucrose, cane wax, starch, pectin, some polysaccharides and polyphenols in the cane juice under low temperature conditions, add phosphoric acid, a small amount of Lime milk, flocculant and air bubbles, using coagulation, floating and adsorption to remove a large amount of organic non-sugar under neutral conditions; then use carbonic acid clarification process to remove pigment and other non-sugar in sugar juice s...

AI Technical Summary

Problems solved by technology

Now the sugar factory has higher and higher requirements on the process, and this control method is difficult to guarantee the accuracy, timeliness and stability of phosphoric acid addition

[0004] Since sugar juice in sugar factories adopts phosphoric acid floating clarification technology, which is the first technology in our country in recent years, there is no relatively mature technology in detection and automatic control. Some sugar factories follow the traditional method of sugarcane juice acidity (pH value) To detect whether the addition of phosphoric acid is appropriate, if the color of the sugarcane juice after pre-ashing is darker, it is difficult to obtain an accurate value by using the traditional titration method to judge its pH value, and there is no report on the automatic control of the addition of phosphoric acid

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