Reasons for low transmittance and pure water volume of spraying production line

Spraying is a kind of processing for products that need to be covered with a protective layer and a decorative layer on the surface. In the spraying production line, the transmittance and pure water are sometimes low. What causes it?

1. Reasons for the low transmittance in the spraying production line

In the ultrafiltration equipment, the flow rate of the tank liquid is low, the pressure setting changes, the coarse filtration is insufficient, and the equipment is often stagnated (the equipment stops running for more than 1 hour), which will reduce the permeation volume and may even cause the ultrafiltration membrane to be damaged.

Failure of the activation layer of the ultrafiltration membrane: The activation layer converts the polarity of the charged material into the same polarity as the bath itself. Its effect is limited by time, and its durability can reach several months under conditions. After the activation layer fails, it needs to be cleaned to restore its function. When cleaning, the cleaning solution should be configured in strict accordance with the formula and ratio, and the cleaning procedure should be carefully followed, otherwise the ultrafiltration membrane will become invalid or scrapped.

2, the reason for the low amount of pure water in the spraying production line

Improper maintenance during the shutdown period: The correct method is to flush the reverse osmosis system with pure water once a day when the shutdown time does not exceed 72 hours, and stop after running for 30 minutes to prevent the components from losing water or growing microorganisms; the system shutdown time exceeds 72 hours , Must be preserved with chemical substances.

Improper selection of cleaning agent and method: The correct method is to check the sediment on the water inlet of the membrane element or the sediment on the filter element, judge the nature of the blockage on the membrane surface, select the appropriate cleaning agent, and pay attention to the pH value and temperature of the cleaning fluid Control. The following table is the configuration method of cleaning fluid, the actual operation should be selected according to different situations.