In heatless air dryer the drying pressure, the moisture in the compressed air is adsorbed by the desiccant material. Dried, clean air is then directed by an outlet check valve out into the pipe distribution system. As cylinder is drying the compressed air, cylinder B is being regenerated. This is achieved by passing a small amount of dry compressed air through a fixed orifice where it expands to atmospheric pressure, flowing through tower B in a counter-current direction to drying. The expansion from line pressure to atmospheric pressure allows the dried air to remove the moisture in the bed of tower B thereby drying (regenerating) the desiccant bed. This purged air then passes out through an exhaust valve and silencer.

Heatless air dryers plays vital role where the equipment used to package products will not function efficiently or properly if the surrounding air is humid. Candy wrapping machines and packaging machines for food powders or drug packets are typical examples. Something as simple as a cake mix becomes a double problem not only does the powdery mix clump and not flow properly in humid conditions, but the packaging equipment is also hindered by the humidity.

Depending on the product, it may be necessary to dry the packaging room and even go to the extreme of providing a dry bath for storage bins or hoppers, especially where powders are used.  In situations where packages are heat-sealed, a container’s own moisture content may adversely affect the adhesion of the sealing material being used. Here neither the product nor the machinery is directly responsible for the problem instead the moisture content of the package is the culprit. Surrounding the area with dry air is the solution.

Out Door Dehumidifier

100% outdoor dehumidification systems are designed and manufactured for demanding mechanical contractor, epoxy flooring contractor, sand blasting job environment, petroleum tanker inner painting areas, hospital ward mopping and cleaning process time environment drying applications widely used to solve your indoor, outdoor air quality problems. Scanair outdoor dehumidifier will maintain temperature and relative humidity as you desire these machines are portable means you can move them around where ever they are needed. It produces from 100 Cfm to 5000 Cfm air flow capacity and refrigeration capacity starts from 1 Ton To 10 Ton available. Options in supply voltage single phase 220 Volt 50 Hz or Three phase 440 Volt 50 Hz.

Application Areas of Dehumidified Dryers.

Dehumidified dryers are widely used in the following areas Wood drying, Leather Drying, Salt Drying, Laundry Drying, Latex Drying, Drying, Drying technology

Scanair seed drier are specially designed and manufactured in three various types. Are which will work like Tray drier type in this the seeds has to filled and kept in the perforated trays closed the drier door and start the dehumidifier for working. The Stand alone dehumidifier connected with in & out hose pipes with the tray drier the basic principle air will be sucked from the drier and get dehumidified and supplied  the air in drier in repeat process. The removal of moisture is based on the principal of physical adsorption. Through experience, it is found that to optimize drying capacity with minimum power consumption, and to retain germination potential in the seed, the air being introduced to the drying chamber should be at 40˚C at 5% RH.

Seed Dryers and Dehumidifier for Cardamom Capsules

These seed dryers are based on state of art technology and incorporate a unique air distribution system through the trays to optimize drying capacity and time.  The seed dryers can handle 50 Kg up to 1000 Kg of seed. The other processes Scanair introduced is, fluidized bed drier type dehumidifier to process the seed like cardamom capsules. Pour in the baffle and close the drier for processing and the stand alone dehumidifier will take care off the process of dehumidification. This is the most important part of the process as it affects the quality of the final product.  It is important to dry the cardamom capsules as soon after harvest as possible to prevent the loss of flavor. It is also important that the drying process is as short as possible so that mould does not grow on the capsules and the bright green colour  is retained. The drying temperature should not be above 50˚C as this affects the colour and delicate flavor of the final product. In most places, cardamom capsules with a good green colour can be sold for a premium price.

The moisture content of a fresh cardamom capsule is about 85%.  This needs to be reduced to 10% in the dried product so the cardamom capsules can be stored.  If the drying period is too long mould can start to grow on the cardamom.  There are several options available to the small scale processor, depending upon the size of the business and the local weather conditions at the time of processing.  Each method has different advantages and disadvantages. Improper drying and storage conditions in handling seeds can have an adverse affect on the life of those seeds.  Loss in viability, discoloration, toxin production and growth of fungus can take place rapidly if proper preventative measures are not taken.

Dehumidifiers for Seed Storage

The other method stored seed in the ware house to keep dehumidified environment with the help of portable or duct able industrial dehumidification system. The safe storage of seeds is important for several reasons.  Of course seeds must be preserved for use as human and animal food.  Seed viability must also be protected (germless protection) for various uses by the plant scientists who maintain a permanent reservoir of seed stock by establishing a seed bank.  Some of the factors affecting the final quality of the seeds are:

• Treatment during harvesting
• Type of processing
• Method of drying
• Environmental control during storage, particularly temperature and relative humidity.

Of the various points mentioned above, we will consider in greater detail the one very important factor relating to temperature and humidity control during storage of various types of seeds.  Undoubtedly the two most important factors in determining the life of the seeds are moisture content and storage temperature.  We have already discussed moisture content in seed drying.  Let’s take a closer look at seed storage.

Storage conditions depend on the projected future use of the seed.  Seed storage has certain requirements which include protection from water, contamination, rodents, fungi, fire etc.  However, relative humidity and temperature are the most critical aspects to keep in mind during storage.  The two are actually interrelated.  In short term storage their relationship can be expressed by a simple thumb rule.  Storage temperature (in deg. F) plus relative humidity should total 100.  For instance, 60˚Fat 40% RH or 55˚F at 45%RH or 65˚F at 35% RH.  In most cases the dew point to be maintained inside corresponds to approximately 35˚F.  This is a good design condition for short-term storage.

For long term storage, the temperature and relative humidity considerations are slightly different.  Moreover, seeds stored for germplasm preservation must be stored under very controlled conditions.  If the storage temperature does not exceed 50˚F and the RH is not higher than 50%, most species of seeds will retain their full initial viability for a few years.  Many seeds will retain good viability for 20 years or more when stored at 35-40˚F and 40%RH.  There are several methods of control currently being used throughout the world.

Desiccant Dehumidifiers

Desiccant Dehumidifiers in seed storage facilities protect a very large investment.  The cost of seeds are high, and in research applications, the seeds may be irreplaceable at any cost. Thousands of dollars and hours of costly effort can be lost at a single stroke when fungus and mold attack seeds in storage.  What is the reason for this damage?  Too much moisture in the seeds combines with warm temperatures to provide an ideal environment for microbiological growth.

Scanair desiccant dehumidifiers control the air around the seeds so they cannot absorb excess moisture that can lead to fungus growth.  This ensures protection of the seeds at any temperature without freeze up problems or loss of efficiency. Seeds last longer at low temperatures.  Because Scanair desiccant dehumidifiers work equally well at high and low temperatures, one can store seeds at any temperature without having to worry about high humidity.

Seed Dryers application areas

Seed dryers are widely used in the following areas – Seed drying, Cardamom drying, Fruits/Vegetable Drying, Tea Leaves Drying, Herbal Drying, Turmeric Drying, Ginger Drying, Garlic Drying, Agricultural Produce Storage Buildings, Grains Warehousing & Storage Areas.

Scanair industrial dehumidifiers are engineered for demanding process drying applications and incorporate latest in the industry leading designed uncontrolled. Package with enhanced futures and high performance refrigeration components are multiple refrigerant cooling injection technology used evaporator coil for optimum level dehumidification.  Product available with wide range from 150 Cfm To 15000 Cfm capacity will maintain between 30% To 40% RH available in standard Models. An custom built designed dehumidifier will maintain below 30% RH with the help of desiccant technology combined units.  Those units are designed new generation styled and built aesthetically to match the modern trend in equipment manufacturing.

Dehumidifiers for Pharmaceutical Production

Dehumidifiers are the most essential component in Pharmaceutical industry, where the rapid technological advances in the have focused the attention on a vast number of moisture control issues.  For example, the presence or absence of a specific amount of moisture in the processing area may be required to grow certain organic cultures.  Or, the presence of moisture may be absolutely necessary for the manufacture of a particular drug.  Similarly, the absence of moisture may be equally imperative for the production of some other drug.  Strict control of moisture is a key factor in the manufacture of most drugs and medicines.

Dehumidifiers play a central role in Pharmaceuticals, where the materials used have a physical affinity for moisture.  This can cause lumping or caking of powdered material.  Further, some powders that are bound into a capture or formed into a tablet under high pressures will adhere only when in a dry state, Humidity can cause a tablet to crumble, and in some cases, it can cause the drug to decompose and diminish in its therapeutic value. To assure consistently high quality drugs, the processing area and machinery must be surrounded by air whose dryness is accurately known with temperature and humidity under control.

Dehumidifiers for Chemical Production

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. The same sort of lumping and caking of powdered substances previously discussed is also a major problem in the industrial chemical production.  Dehumidifiers play a major role in preserving the chemicals intact, as some chemicals decompose in the presence of water vapor.  In other situations, water vapor can actually cause a chemical reaction that changes the character of the product. Atmospheric moisture is also a natural enemy to many grinding and pulverizing operations.  Water vapor in contact with the product can make it resilient and difficult to grind, causing it to cling to the grinding machine and defy pneumatic conveyance from one process area to another.

Industrial Dehumidifiers Industrial Applications

Industrial Dehumidifiers are widely used in the following areas, Blister Packing Machine, Pouch Filling Machine, Printing Industries, Hospital Operation Theaters, Medical Equipment , MRI scan, CT scan, Pet Scan Rooms, pharmaceutical productions, Laboratories, R & D Labs, Food Processing Plants, Clean Rooms, Textile Plants, Food Drying, Packaging Areas.