Production Performance Issues (Most Easily Observable)
1. Irreversible Decline in Separation Efficiency: Even with replacement of the hydrocyclone tubes and adjustment of process parameters, the starch recovery rate remains consistently below 90%, far below the standard level of over 95% for new equipment.
2. Substandard Finished Product Indicators: The processed starch consistently exceeds standards for impurities such as protein and fine residue, and the starch whiteness and purity fail to meet factory requirements.
3. Abnormal Operating Parameters: Under the same feed conditions, the pressure difference between the hydrocyclone inlet and outlet fluctuates continuously, failing to stabilize within the standard range, affecting production stability.
Core Component Aging Phenomena
1. Hydrocyclone Tubes: The inner walls are generally worn beyond acceptable limits. The replacement frequency of a single hydrocyclone tube has decreased from once every 3-5 years to 1-2 years or even less. 1. Deformation, cracking, and uneven inner wall roughness:
2. Stainless steel body: Large areas of rust and oxidation peeling appear on the surface; corrosion spots or cracks appear at the weld seams; the vessel wall gradually thins due to corrosion.
3. Sealing components: Sealing gaskets frequently age, crack, and leak; leaks reappear shortly after replacement; the overall sealing performance of the equipment cannot be restored.
Appearance and structural aging phenomena:
1. The stainless steel shell loses its original metallic luster; uneven corrosion pits appear on the surface; the shell undergoes irreversible deformation.
2. The equipment installation reference plane is offset; the connection positions of each stage of hydrocyclone are misaligned, making it impossible to guarantee precise pressure and flow matching.
3. Service life exceeds 10 years, and frequent maintenance is required to maintain production; the cost of each maintenance gradually increases.
