Desiccant Dehumidifier

Scanair Desiccant Dehumidifier designed and manufactured under CNC Fabrication to controlled air tight and finish in all air passages and lower capacity machines will have a caster wheel to move the machine as you desire. The dynamically balanced desiccant rotor for long lasting operation. The rotor movements are controlled by PLC Controller process can be matched accordingly the outlet process air.  Operation indicators provided for ensure the operation and trouble indicators will show when the machine is in trouble like rotor jam, heater failures, blower motor failure and also additional feature audible alarm available.

Scanair desiccant dehumidifier is built to suit GMP applications it is provided with pre filter 10 and 5 micron main filter with 0.3 micron Hepa media filters are available its start from 50 Cfm To 5000 Cfm standalone model single phase 220 Volt 50 Hz, Three phase 440 Volt 50 Hz options. Desiccant-based systems are more economical than refrigeration systems at lower temperatures and lower moisture levels. Typically, a desiccant dehumidification system is utilized for applications below 35% RH down to 1% RH. Thus, in many applications, a DX or chilled water pre- cooling coil is mounted directly at the dehumidifier inlet. This design allows for removal of much of the initial heat and moisture prior to entering the dehumidifier where the moisture is reduced even further.

In order to achieve the controlled air requirement listed above, refrigeration equipment alone becomes uneconomical, impractical and cumbersome to design, operate and maintain.  On the other hand desiccant type dehumidifiers combined with refrigeration can offer a simple and economical solution to controlling both temperature and humidity levels as low as necessary.

Desiccant Dehumidifier for Storage or Processing Film and Paper

Desiccant Dehumidifier is the perfect solution for processing and storage of film and paper. All photosensitive materials deteriorate with age, the rate is largely dependent upon the ambient conditions. Deterioration increases rapidly under high temperature and humidity levels. High humidity alone is usually more harmful than high temperatures. High humidity levels can accelerate loss of sensitivity and contrast, increase shrinkage, produce mottle, cause softening of the emulsion, and promote fungus growth.

Under extremely humid conditions, film or paper should be both exposed and processed as soon as possible after the package is opened.  If exposed products cannot be processed on the same day that they are exposed, they should be kept in a dehumidified cabinet or store room. Color films or papers should be stored at 50˚F or lower. Air conditioning with relative humidity control provides the most desirable storage conditions for unprocessed products.

The required storage conditions for developed film and paper depend on:

  • The value of records
  • The length of storage time
  • Whether the films are on nitrate or safety base
  • Whether the paper base is resin coated
  • The type of photographic image

High humidity damages gelatin, encourages the growth of mold, increases dimensional changes, accelerates the decomposition of nitrate support, and accelerates deterioration of both black and white and color images. Medium-term storage of photographic film is suitable for preservation for up to ten (10) years. The most satisfactory humidity and temperature levels for storage are 30%-40% RH at 24 -28˚C.  A desiccant dehumidifier with cooling coils is the most efficient and economical means of accomplishing the desired conditions. The archival storage of records on film also requires environmental control of about 15%-30% RH at temperatures below 22˚C.

Proper preservation of photographic materials is complicated because each of the phases is controlled by a separate group. The composition of the film or paper is controlled by the manufacturer, the processing by the processing laboratory, and the storage conditions by the customer. The importance of environmental control in all three phases must be recognized by all in order to assure a high quality final product.

Desiccant Dehumidifier application areas

Desiccant Dehumidifiers are widely used in Industrial drying, Instant noodles drying, Noodles drying, Rice powder noodles drying, Soya products & pepper drying, Mushroom drying, Onion drying, Fruits drying, Herbs drying, Wood drying, Drugs drying,  Fish drying, Tea drying, Potato chips drying, Dried shrimps, Tobacco storage.

Tags: , , , , ,