Effect of daily cleaning of starch centrifuge on processing efficiency

Effect of daily cleaning of starch centrifuge on processing efficiency
A key link in the corn wet grinding process is the use of disc centrifuges to concentrate and separate starch proteins. After the centrifuge has been running for a period of time, dirt will accumulate between the discs, which will affect the processing effect of the starch centrifuge. At present, most companies use regular manual disassembly and assembly to clean centrifuges. This method not only affects production efficiency, but improper cleaning methods will also affect the service life of centrifuge discs. Therefore, if the starch centrifuge can be measured and cleaned without disassembly and assembly, it will greatly promote the entire production. The disc centrifuge is a type of vertical centrifuge. The drum is mounted on the upper end of the vertical shaft and is driven by an electric motor through a transmission device to rotate at high speed. There is a set of disc-shaped parts that are stacked on each other inside the drum. There is a small gap between the discs. The suspension (or emulsion) is added to the drum through a feed pipe located in the center of the drum. When the suspension (or emulsion) flows through the gap between the discs, the solid particles (or droplets) settle to the discs under the action of the centrifuge to form a sediment (or liquid layer).
There is a small gap between the disc and the disc. The suspension (or emulsion) is added to the drum through a feed pipe located in the center of the drum. When the suspension (or emulsion) flows through the gap between the discs, the solid particles (or droplets) settle to the discs under the action of the centrifuge to form a sediment (or liquid layer).
The sediment slides along the surface of the disc and breaks away from the disc and accumulates in the largest diameter part of the drum. The separated liquid is discharged from the drum through the liquid outlet. The function of the disc is to shorten the settling distance of solid particles (or liquid droplets) and expand the settling area of ​​the drum. The installation of the disc in the drum greatly improves the production capacity of the separator. The solids accumulated in the drum can be disassembled and removed manually after the separator is shut down, or they can be discharged from the drum through the slag discharge mechanism without stopping the machine. Due to long-term operation of the disc centrifuge, there will be dirt between the discs. The presence of dirt will reduce the space between the discs and reduce the processing capacity of the centrifuge. At the same time, the space between the discs will become narrow. , the flow rate of the material to be separated between the discs will increase, resulting in a reduction in separation efficiency. The speed of the disc group is increased by 20%, and the separation efficiency is reduced by 20%! Regular cleaning of the disc centrifuge is a necessary measure to ensure the normal operation of the centrifuge.
However, the current manual cleaning has the following disadvantages:
The labor efficiency is low and requires multiple people to disassemble and assemble, which is especially inconvenient when production tasks are tight.
The cleaning efficiency is low. You need to soak the disc first and then scrub it with a brush.
Mechanical cleaning may scratch the disc surface, causing deposits to adhere faster and more firmly. Therefore, mild chemical cleaning is preferable to mechanical cleaning.
Multiple disassembly and assembly of the equipment resulted in a management blind spot in the operation stability of the centrifuge equipment.
CIP online cleaning (clean in place), also known as in-place cleaning, means that the equipment can be cleaned under closed conditions without disassembling the equipment. Its advantage over traditional manual cleaning is that it improves cleaning time and uniformity. It has advantages in terms of repeatability and parameterization. The cleaning parameters can be fixed, which will not lead to unqualified cleaning caused by human operations. After setting the program, the CIP cleaning system automatically starts cleaning, through the pneumatic valve , circulating pumps, online instruments, etc. are detected and controlled, and the cleaning end point is automatically determined.
Applying thermal energy, mechanical energy, and chemical energy to the surface dirt of the object to be cleaned achieves effective cleaning of the object to be cleaned within a certain period of time through the interaction of dissolution, thermal, mechanical, interfacial activity, and chemical effects.
Seven basic principles for choosing detergents
(1) Efficient cleaning with broad spectrum;
(2) The use of household detergents is not recommended because its ingredients, quality, microorganisms, etc. are unclear;
(3) Choose a detergent with simple components and determined ingredient content;
(4) Easy to check;
(5) Good stability and safe to use;
(6) Compatibility with equipment or environmental materials;
(7) The cost is lower.

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