DCS control system for producing anhydrous crystalline fructose by using sugarcanes as raw materials

Abstract

The invention relates to a DCS control system for producing anhydrous crystalline fructose by using sugarcanes as raw materials. According to the system, a pH control unit is set in a hydrolysis neutralization process of sugarcane juice concentration; a conductivity control unit is set in a continuous ion exchange stage of high fructose corn syrup; a flow rate, concentration and temperature control unit is set in a concentrating process after fructose and glucose ion exchange separation; a flow rate, liquid level, concentration and temperature control unit is set in a fructose concentrating, crystallization and drying processes; and a flow rate, liquid level, concentration and temperature control unit is arranged in a glucose recovery process. According to the control units, sensors are arranged in equipment; control valves are arranged at feeding openings and discharging openings; and the sensors are connected with an industrial Ethernet switch through lines and are further connected with a control room workstation and a central control room DCS workstation respectively, and are connected with a remote control center through the Internet. With the DCS control system of the invention adopted, and equipment devices and process parameters in each process are controlled comprehensively and automatically and are reasonably matched, and equipment input and production cost are greatly reduced, and the primary yield of industrially-produced crystalline fructose products can be up to 50%.

Description

technical field [0001] The invention belongs to the technical field of industrial production control, and in particular relates to a DCS control system for industrially producing pharmaceutical anhydrous crystalline fructose with sugarcane as raw material. Background technique [0002] Fructose, also known as dextrose, is a monosaccharide, the full name is D-arabinoketohexose, and the molecular formula is C 5 h 12 o 5 CO, whose biochemical name is abbreviated as F, is a prismatic crystal with a melting point of 103-105°C and a sweetness of 1.3-1.8 times that of sucrose (better eaten in cold storage). It is the sweetest natural sweetener and exists in large quantities in free form In honey and fruit juice, it combines with glucose to form sucrose for daily consumption. Pure fructose is a white crystal, easy to absorb moisture, not easy to crystallize, usually viscous liquid, soluble in water and ethanol, insoluble in ether. [0003] Fructose products are usually divided i...

AI Technical Summary

Problems solved by technology

Due to the difficulty of separation, crystallization and drying of fructose, the complex production process, and the large investment in civil engineering and equipment, the large-scale industrial production of crystalline fructose in my country is still in its infancy, and the production cost is high. High-quality medical fructose mainly relies on imports

The fructose content of domestic industrialized production of crystalline fructose products is usually about 99%, the quality is unstable, and the yield of the product is less than 40%.

Moreover, due to the defects of the existing production process, the industrial production of fructose generally has a complete set of production equipment that does not match, and the process parameters are unreasonable, resulting in high energy consumption, low efficiency, unstable quality, and high production costs.

[0013] In terms of automatic control, due to the complex process of producing crystalline fructose from sucrose, many reaction process experiments are still in the research stage, and the operation is not very mature. The unit operations of crystallization and glucose solution recovery are still controlled manually

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