9-22 What are the reasons and solutions for the blue silica gel in the sight glass of the regeneration dryer turning white or pink and the outlet dew point rising?

Answer:
(1) Cause analysis.

    1) Long-term shutdown, the front and rear valves of the dryer are not closed, and moisture in the atmosphere enters the tank.

    2) The pre-filter fails or the oil and water are not discharged on time, causing liquid oil and water to impact the desiccant.

    3) The adsorbent oil is poisoned or seriously pulverized.

    4) The regeneration switching system fails and cannot regenerate normally.

    5) The muffler is blocked and the regeneration back pressure is too high.

    6) The inlet temperature is too high or the inlet pressure is too low.

    7) Insufficient regeneration gas volume.

    8) Exceeding the maximum flow value and exceeding the design conditions.

(2) Solution.

    1) Continuously start the machine for natural drying (increasing the regeneration gas volume).

    2) After eliminating the pre-filter failure, start the machine for natural drying or replace the adsorbent.

    3) Replace the adsorbent.

    4) Troubleshoot.

    5) Clean or replace the muffler.

    6) Add a cooler and adjust the system working pressure.

    7) Rotate the throttle valve counterclockwise to increase the regeneration gas volume.

    8) Put into standby equipment or recheck the design flow.