Desiccant dryers DB series
For flow rates from 710 – 13,550 m3/h
Benefits and Features
- External-heat regeneration system
- No loss of compressed air for regeneration or cooling
- Pressure drop lower than 0.1 bar at full capacity
- Sophisticated PLC control and communication unit
- Parallel drying phase for steady dewpoint performance
- Low maintenance and long-life desiccant
Design specifications
- Fully-automatic and continuous cycle control
- Steel support frame with foundation holes
- Pressure vessels according to various industrial designs, codes and regulations
- „Heavy-duty“ blower system
- Easy-access to the heating system and the single-replaceable elements
- Control box with IP54 rating
- Temperature and pressure indicators on both vessels
- Compressor Start-Stop function linked into drying cycle
- Dewpoint-controlled cycle with indication and dewpoint setting
- PLC (Siemens S-series) controls offering:
- Fully automatic cycle
- Alarm indication for all important dryer functions
- Memory of alarm history
- Fast-run cycle test
- Display of required service intervals
- Communication port to remote systems (optional)
- Thermal insulation of all hot parts
- Top-to-bottom flow direction avoiding fluidisation of adsorbent bed
- Epoxy painting RAL 9001
- All butterfly valves for lowest pressure drop
Available options according to customer specifications
- Installed filtration package
- By-pass over complete dryer
- Different PLC types
- Outdoor installation
- Pressure dewpoint -70°C
- Steam regeneration system
- Other options available on request
How it works
This heat-regenerated Desiccant Dryer is the most commonly used in medium-sized to big-sized compressed air installations (from 350 to 13,000 m3/h). As opposed to the internally-heated dryers, the heaters used for regeneration are easy to control, simple to service and they can optionally be combined with steam heating.
- In these dryers, the flow during the drying and during the regeneration are both from top to bottom. This principle offers the following advantages:
- An optimal utilisation of the regeneration energy and heat of adsorption
- No dewpoints peaks during changeover
- Protection against appearance of liquid water
- No loss of compressed air for the cooling process
- Protection of the desiccant at starting of the compressor and from pressure and flow fluctuations.
Delair DB dryers do not make use of any compressed air and have a maximal pressure drop of 0.1 bar. This drying principle also offers the possibility of an Energy Management System with ample technical and economical advantages. A special option is the “closed-loop” cooling, which makes it possible to use the dryer with high ambient temperature or when a pressure dewpoint of -70°C is required. Also under such conditions, no compressed air is used for regeneration or cooling.
The DB series dryers are simple to operate and are equipped with a display showing current information and historical operating data. Extra communication modules for connection with higher-level process control systems are also available.