How to choose a suitable industrial dehumidifier

In the plastics processing industry, products often exhibit shrinkage, silver streaks, bubbles, cracks, flow marks, and poor transparency. The primary cause of these quality issues is insufficient drying of the plastic before molding. Therefore, a dehumidifier is necessary for dehumidification and drying. So, how do you choose the right industrial dehumidifier?

1. Choosing the Right Dryer Type

Commonly used industrial dehumidifiers include refrigerated dehumidifiers and rotary dehumidifiers. Refrigerated dehumidifiers offer high dehumidification efficiency and are economical, making them suitable for most environments. However, refrigerated dehumidifiers are not suitable for use in low-temperature environments (≤5°C) and have difficulty reducing humidity to below 30% RH. Therefore, if the dehumidifier is required in an area with temperatures below 5°C or humidity requirements below 30%, a refrigerated dehumidifier is not recommended.

Rotary dehumidifiers are less affected by ambient temperature and humidity, making them a very stable and reliable dehumidification device. Compared to refrigerated dehumidifiers, rotary dehumidifiers with the same dehumidification capacity are several times more expensive. Generally speaking, rotary dehumidifiers are primarily suitable for the following two environments: 1. Low-temperature environments, such as cold storage and chocolate packaging workshops; 2. Environments with a humidity requirement of ≤30%, such as the pharmaceutical and chemical industries.

2. Calculating Dehumidification Capacity

Dehumidification capacity refers to the amount of water required to liquefy air in a given space to achieve the target humidity, typically expressed in liters per hour. Calculating dehumidification capacity typically involves subtracting the water content per unit of air at the target humidity from the water content per unit of air at the ambient humidity. This calculation requires the use of an air enthalpy and entropy table or specialized calculation software. The final dehumidification capacity should also be adjusted based on ambient temperature and sealing conditions.

3. Determining the Number of Dehumidification Dryers

After calculating the required dehumidification capacity, we must find a balance between the number of dehumidification dryers and the dehumidification capacity of each dryer. Installing too many dehumidification dryers in a single space can hinder its use and cause inconvenience.

The above is how to choose a suitable industrial dehumidification dryer. Of course, price is also one of the main factors when purchasing a dehumidification dryer. Users can find the most suitable industrial dehumidification dryer based on their budget.