| 摘要 |
FIELD: waste water purification. SUBSTANCE: invention objective is to pull up a plastic film material onto the frame of a modulus of given configuration when being manufactured, and additionally repull plates of modulus under operation. To do this, a heat-shrinkable plastic film is utilized which, under a brief temperature action, tends to thicken and decrease its dimensions in longitudinal and transverse directions. The latter provides self-pulling of plates in the manufacture process and their repulling under modulus operation. Method makes it possible to avoid nonuniformity in the tension, skewness, and damage of plates when modulus is being manufactured, and also to restore plate regions slacked under operation. EFFECT: ensured reliability in operation of modulus. |
