How to Maintain Honeycomb Rotor

Structure of Honeycomb Rotor

It is designed to absorb moistures in the air which goes through rotor so that air can be dehumidified and dew-point lowered. Wheel body, fixed mount, central bearing, gears (including chain wheel and pulley) and motor compose honeycomb rotor. Wheel body is composed of ceramic fiber and ceramic wheel body with organic additive. Both Molecular sieve and silica gel are sintered with high temperature to harden surface and to adhere themselves to honeycomb inwall. And the tiny holes on the surface of ceramic fiber rotor have the functions of broadening contact area with wet air to improve the capability of moisture absorption.

Rotor body is made from ceramic fiber and it has characteristics of being difficult to fall off, powder-less and anti-ageing. In tubular or turntable molecular sieves, dusts caused by ageing may be blown into drying area, making sieve being contaminated again. However, the problem will not take place if you adopt honeycomb rotor. Plus, honeycomb rotor has a long lifespan and is repeatable to clean and easy to maintain. However, degradation of molecular sieve and silica gel in honeycomb rotor remains as a result of longtime absorption and recycling operation.
 

Maintaining Key Points:

Prior to maintaining, make sure switch off main power and main control and pull plugs out.

Make daily check on if there is dust in the surface of rotor; if dusts are spotted, use dust-collector with brush to absorb them.

Recommended: clear out dusts in rotor interior through compressed air once every month; under the environment with poor quality air, if dehumidifying effect is beyond expectation, compressed air is needed to clear the channels inside rotor.

After the cleaning above, if air dehumidifying effect can not meet the requirement, another cleaning step to get rid of the filth attached to rotor inwall is necessary:

Without any regeneration drying” handling, blow the air with more than 60%RH humidity to saturate the rotor. If air humidity is favorable, rotor can be saturated by switching off regeneration heater and running drying blower and motor. If air is too dry, air needs to be moisturized via humidity regulator. The step takes one hour or so.

Based on composition of filth, immerse rotor in water or dissolvent such as xylol. For the greasy filth, put rotor in the detergent with PH value is less then 7. (Too high PH value may dissolve silica gel). Then shake rotor up and down slightly for 15 minutes for cleaning.

Take rotor out of dissolvent and place it vertically for 5 minutes to release liquid.

Blow liquid remaining in tubes via compressed air.

Mount rotor to machine and run the regeneration operation (150℃) for at least one hour.
 

If using dissolvent for cleaning, it is inevitable that odor will remain in the air for s while. Straticulate oil dirt and other sticky filths are impossible to get rid of completely so honeycomb rotor would be replaced. This kind of situation may be caused by the exhaust, which is inhaled by drying blower when diesel driven vehicle running near the machine. After cleaning, dehumidifying effect would be improved but it will be getting a little bit weakened. Specially notice that irreversible adsorption of ammonia, formic acid and carbon dioxide will cause molecular sieve failure. In this case, you need to resort to some professional ways to activate molecular sieve.

Important Points in Using Honeycomb Dehumidifier:

Air in/out let of machine should be free of blockage and air screen should be cleaned.

Dehumidifier should be placed horizontally to avoid imbalance when operation.

Condenser should be cleaned regularly.

Intervention of stick and iron wire is forbidden to avoid faults and dangers.

Regularly check if these devices are in normal state including motor, sensor, speed regulator, pulley regulator, pulley stretcher and gear transmitter.

Check and replace sealing element at fixed time.

Make sure all parts are consolidately running.
 

Degradation of Honeycomb Rotor

The absorption capacity of molecular sieve and silica gel becomes declining due to the repeatable using, this is what we refer to Degradation.

Degradation is mainly caused by hysteresis and adsorbent regenaretion.

The structure and shapes of adsorbent pores are complicated, sometimes chemical reactions would take place. This is why there is always adsorbate substance remains inside adsorbents and these substances accumulate as cycle goes. Absorption capacity is under declining due to these residuals in the surface.

Adsorbent regeneration such as heating regeneration, when temperature is high, adsorbent will be rendered a state of semi-melting, which blocks some pores and extinct them and absorption surface area is reduced.

Chemical reaction would break crystallizing of adsorbent pores such as dilute acid or alkali of air will damage the crystallization of molecular sieve and silica gel, then decline the absorption capacity.

Under the regular maintaining, honeycomb rotor can work in a highly absorbing efficiency for a long time. To give the full play of honeycomb dehumidifier operation in a few years, replace the rotor with a new one is considered best solution.