Cookers for oxidized starch
The cookers run in a manual or fully automatic mode; they are designed for continuous cooking of oxidized potato and corn starches for application in size or film presses.
Design
The cookers run in a manual or fully automatic mode; they are designed for continuous cooking of oxidized potato and corn starches for application in size or film presses. Capacity: 50 - 1.500 kg/h; higher capacities also available, if necessary.
Powder starch storage reservoir:
- hopper integrated in the cooker frame; filled from paper bags or “Big-Bags”
- low-capacity silo connected directly to the cooker, filled from “Big-Bags”
- low-capacity silo installed separately from cooker and connected to dosing screw by screw conveyer
- large-capacity silo: 50/85/100/120 m3, made of GPRS material
Cooker conception:
- integrated compact unit (all cooker parts integrated into the carrying frame)
- split conception (slurry unit below the cone of a large-capacity silo and connected to the cooker with a pipeline)
- cookers with or without subsequent storage tank
- cooker controlled by a single-purpose programmable relay
- cooker controlled by CPU and touch LCD panel
- option: visualisation in paper machine DCS or on dedicated PC station located in PM operation roo
Main parts
Key cooker components for oxidized starches preparation, type JC:
- powder starch storage tank
- precise starch dosing equipment (dosing screw driven by geared electric motor, speed regulation by frequency converter)
- slurry unit with accessories (equipment for agitation of starch with water by effective agitator with dispersive action)
- cooking unit with accessories (regulation of saturated steam injection, cooking pipe, dilution circuit for final correction of outlet concentration)
- electric accessories and control system
Functional description of cooker for oxidized starches preparation, type JC
Powder oxidized starch is stored in one of the storage tanks. From here, it is continuously dosed into a slurry unit with a water supply. The slurry concentration depends on the starch content in water. The slurry is continuously conveyed by a screw pump to a cooking part of the cooker. In this cooking part, saturated steam is injected into a static mixer followed by a cooking pipe.
The steam flow and cooking temperature are regulated by a regulation loop. The cooking pipe is designed both for potato and corn starches so that starch slurry is always properly cooked. After the cooking pipe, there is a static mixer for the cold water supply where final concentration of the cooked starch solution can be set according to technological requirements. Diluting water flow is controlled by a regulation loop. The diluted and cooled starch solution in required concentration can be stored in a storage tank.
The whole process of oxidized starch preparation is monitored by the control system providing:
- constant slurry concentration
- possible regulation of slurry concentration according to technological requirements
- reproducible mode of continuous cooking
- reproducible output parameters of cooked starch (concentration)
- automatic start/stop switch according to external signals
- automatic rinse mode before start phase and after process termination
- according to required range and configuration of control system, it is possible to regulate capacity manually or through external signals (e.g. in dependence on PM capacity)
Advantages
The whole process of oxidized starch preparation is monitored by the control system providing:
- constant slurry concentration
- possible regulation of slurry concentration according to technological requirements
- reproducible mode of continuous cooking
- reproducible output parameters of cooked starch (concentration)
- automatic start/stop switch according to external signals
- automatic rinse mode before start phase and after process termination
- according to required range and configuration of control system, it is possible to regulate capacity manually or through external signals (e.g. in dependence on PM capacity)
