Inorganic sludges Drying Machine

The sludge drying process is a thermal treatment that removes water from wastewater sludge via evaporation. Applying heat reduces moisture content from a typical 75-85% to just 5-15%, achieving a 75-90% volume reduction. This transforms heavy, wet waste into a dry, stable, and, if required, pathogen-free product.

Industrial and municipal facilities generate millions of tons of sludge annually, creating a significant disposal challenge. The primary problem is cost: wet sludge is mostly water, making it heavy, difficult to handle, and expensive to transport.

It’s crucial to distinguish drying from mechanical dewatering. While dewatering uses physical pressure to reach 25-35% dry solids, thermal drying uses heat to evaporate moisture, achieving 90-95% dry solids. It is not uncommon to have both mechanical dewatering followed by a heat-applied dryer to minimize moisture and energy costs.

This dramatic volume reduction directly lowers hauling and landfill fees. More importantly, it turns a disposal problem into a resource recovery opportunity. Dried sludge can be converted into valuable products like Class A biosolids for agriculture, fuel for energy recovery, or feedstock for cement kilns.

Technical performance of rotary kiln gypsum drying machine for sale:

Not all sludge is the same, and its properties dictate the best drying technology and energy requirements.

• Moisture Content: Sludge enters at 75-85% moisture. Free water evaporates easily, but bound water (chemically or physically attached to solids) requires more energy to remove.
• Particle Size: Smaller, uniform particles dry faster and more evenly.
• Organic vs. Inorganic Content: This affects calorific value and drying behavior. High organic content can increase stickiness.
• Chemical Composition: The presence of chemicals can impact drying rates, cause corrosion, or limit end-use options for the dried product.
• Stickiness and Agglomeration: Some sludges become pasty or form clumps during drying, which can stick to equipment and hinder performance.

Hengyang Industry is an Chinese Company based in Zhengzhou city that manufactures, on proprietary technology, plants and equipment for waste recycling and recovery with energy production, material recovery or production of finished goods.

Innovation, R&D, passionate and skilled team along with the customer satisfaction have always been the success of Hengyang and they still are the peculiarities of our Company. Besides the historical Hengyang equipment, like single and double shafts shredders, Crushing machine, briquetting machines, separators, squeezers and centrifuges, the Company offers a wide range of turn-key plants, among which:

• briquetting and pelletizing plants
• shredding plants
• Waste Sorting Plants
• Bio-fuel Plants
• Waste to Power Recycling Plants
• Mining Plants
• OEM Equipments
……..
Hengyang is able to develop customized solutions too.
Designed, constructed and assembled by the same Hengyang

The Company policy focuses on product quality: robustness and functionality of the machines that maintain their value over time.
The ability to challenge ideas and concepts and to interact with partners worldwide has allowed and still allows Hengyang to stay highly competitive and to be an ideal partner for the world market.