company news about Small footprint and low energy consumption! Atlas Copco's rotary drum dryers help photovoltaic companies maintain a stable supply of compressed air.

The first rotary drum heat of compression dryer

    Atlas Copco's first rotary drum heat of compression desiccant dryer was produced in 1973, marking over 50 years of history. The rotary drum heat of compression desiccant dryer (hereafter referred to as MD/ND) utilizes the waste heat of compressed air to continuously regenerate the adsorbent, without any compressed air loss during the regeneration process. Furthermore, unlike traditional adsorption dryers, it eliminates the need for dual-tower switching, providing customers with compressed air with a stable pressure dew point. This unique technology allows for zero air consumption.

Product Highlights

    The MD/ND dryer, paired with an oil-free compressor, performs both drying and regeneration within a single tower, creating a compact footprint and eliminating the need for valve switching, ensuring reliable operation. It eliminates the need for filters, air receivers, or water separators, minimizing pressure drop across the entire compressed air system. Since its introduction to the Chinese market in 2015, the MD/ND dryer has received widespread acclaim for its superior performance and outstanding energy efficiency. ND dryers can be found in numerous Class-A energy-efficient air conditioning plants built by Atlas Copco.

Core Competitiveness

1. Energy Saving and Carbon Reduction

Energy saving and carbon reduction have become the goals of many companies, and zero-gas-consumption heat of compression dryers have become a trend in the industry. However, when heat of compression dryers are paired with variable-frequency oil-free air compressors, when customer gas usage is low or unstable, the regeneration gas volume is small, the regeneration heat is insufficient, and sufficient regeneration is difficult to achieve, resulting in an inability to fully regenerate the adsorbent and an unreliable pressure dew point. The newly upgraded ND600 and 800 VSD models feature a low-load function, ensuring a stable output pressure dew point even when gas usage is low.

2. Seasonal Switching

One-touch switching allows for multiple operating modes to meet diverse customer needs. In winter, the ND can be set to economy mode, minimizing heater energy consumption. In summer, it can be set to optimal dew point mode. And in spring and autumn, it can be set to intelligent mode. Furthermore, the ND comes factory-installed with connecting pipes to the screw compressor, saving customers some installation and piping costs.

Listen to Customer Feedback

    An optoelectronics company is a manufacturing subsidiary of GAC Group. It specializes in electrical machinery and equipment manufacturing, with business spanning automotive parts R&D, optoelectronic device manufacturing, and semiconductor lighting device manufacturing. In recent years, they've needed to expand their production lines, requiring the placement of four air compressors, dryers, and air tanks within limited space. The compact footprint of the ND dryer proved crucial for this project.

    Compared to traditional twin-tower heat of compression dryers, the ND's low pressure drop, low overall energy consumption, and guaranteed dew point were key to the project's success. Because the customer's pressure dew point requirements vary at different times, we provided them with a dual cooling system consisting of cooling water and chilled water, using cooling water for low pressure dew point requirements and chilled water for high pressure dew point requirements. Combined with the ND's three selectable control modes, it delivers low-energy, stable, and high-quality compressed air, ensuring stable production for the customer.