Henan Hongke Heavy Machinery Co., Ltd. is pleased to report on the successful deployment of a Φ3.5×50m sludge incineration rotary kiln at a customer site in Jiangxi Province, China. This project demonstrates our capability to deliver heavy-duty thermal processing solutions for industrial and municipal sludge treatment.
Project Overview: Addressing the Sludge Challenge
Our customer in Jiangxi operates a comprehensive waste treatment facility handling significant volumes of industrial and municipal sludge. Sludge treatment has become a critical environmental concern worldwide. Sewage sludge—a byproduct with high moisture content (typically around 80% before treatment) and high organic content—requires effective processing to achieve volume reduction, pathogen destruction, and stabilization before disposal or resource recovery .
The facility generates substantial amounts of wet sludge from local municipal wastewater treatment plants and industrial operations. Traditional disposal methods such as landfilling were becoming increasingly costly and environmentally unsustainable, prompting the need for an efficient thermal treatment solution.
The Challenge: High Moisture, Sticky Feed, and Emission Control
Sludge incineration presents several well-known engineering challenges:
High moisture content: Wet sludge typically contains about 80% water. Thermal semi-drying to 30–40% moisture is usually recommended before incineration to achieve a higher lower heating value .
Sticky consistency: Sludge has a notorious tendency to stick to kiln walls and form rings, causing operational headaches and downtime.
Variable calorific value: The caloric value of semi-dried sludge is typically below 5,000 kJ/kg, often requiring auxiliary fuel such as coal or natural gas for stable incineration .
Emission compliance: Strict environmental regulations demand effective control of SOx, NOx, dioxins, and particulate emissions.
The customer required a system capable of processing sludge efficiently while meeting local environmental standards and minimizing operational costs.
Our Solution: Φ3.5×50m Sludge Incineration Rotary Kiln
Henan Hongke Heavy Machinery engineered a complete incineration system centered around a Φ3.5×50m rotary kiln—a proven configuration for medium-to-large-scale sludge thermal treatment. This model is widely recognized in the industry for its high treatment rate and operational reliability .
Key Equipment Specifications
| Parameter | Value |
|---|---|
| Kiln diameter | 3.5 meters |
| Kiln length | 50 meters |
| Capacity | Custom-engineered to customer requirements |
| Operating temperature | 850–1,200°C (adjustable) |
| Drive system | Heavy-duty gear drive with auxiliary motor |
| Sealing system | Labyrinth seals with air purge |
System Configuration
The complete system supplied for this Jiangxi project includes:
Rotary Kiln Body – Φ3.5×50m with high-alumina refractory lining for thermal efficiency and wear resistance. The kiln is inclined slightly to the horizontal and rotates slowly about its axis, allowing material to move gradually from feed end to discharge end while undergoing drying, volatilization, ignition, and complete burnout .
Feed System – Designed to handle semi-dried sludge with screw or belt conveyor for consistent material entry.
Burner System – Multi-fuel capable (coal powder or natural gas) to support stable incineration and supplement the sludge's calorific value as needed.
Secondary Combustion Chamber – Provides extended residence time at high temperature (typically 950°C or above) to ensure complete destruction of volatile organic compounds. Research indicates that incineration at 950°C is more effective for controlling dioxins and other hazardous gases .
Dust Collection System – Multi-stage treatment including cyclone pre-separator and bag filter to achieve emission compliance.
Control System – PLC-based with temperature monitoring across zones, speed control, and automated alarm systems.
Why Rotary Kiln for Sludge Incineration?
Rotary kilns are widely recognized as the most reliable solution for sludge thermal treatment due to their:
Wide adaptability – capable of handling solid, liquid, and semi-solid wastes with varying physical compositions
High-temperature operation – achieves complete destruction of organics and pathogen elimination
Continuous operation – 24/7 processing with minimal intervention
Proven track record – extensively used in sludge incineration applications worldwide
Customer Benefits
Once fully operational, the Jiangxi sludge incineration system will deliver:
Significant volume reduction – Sludge volume can be reduced by over 90%, minimizing disposal costs
Environmental compliance – Modern emission control systems ensure regulatory compliance
Resource recovery potential – Incineration ash may be suitable for construction materials or other applications
Reliable 24/7 operation – Heavy-duty construction minimizes downtime
About Henan Hongke Heavy Machinery Co., Ltd.
Henan Hongke Heavy Machinery Co., Ltd. (Henan Hongke Machinery) has been manufacturing industrial processing equipment since 2006. Our product portfolio includes:
Rotary Kilns – for sludge incineration, lime, cement, metallurgy, and mineral calcination
Rotary Dryers – for sludge, biomass, and industrial materials
Ball Mills – for ore, slag, cement, and chemical grinding
Crushers – for primary and secondary size reduction
We provide custom engineering, full manufacturing, installation guidance, and after-sales support for customers worldwide. Our rotary kiln calcination systems incorporate advanced hydraulic gear devices, high-precision metering, and contact graphite block sealing technology, improving operational rate by up to 10% compared to conventional configurations .
Summary
The Φ3.5×50m sludge incineration rotary kiln in Jiangxi is engineered to transform a challenging waste management problem into a sustainable, compliant operation. By leveraging proven rotary kiln technology with modern control and emission systems, the facility will achieve effective sludge reduction while meeting environmental standards.
For sludge incineration, calcination, or other thermal treatment applications, contact Henan Hongke Heavy Machinery Co., Ltd.
Henan Hongke Heavy Machinery Co., Ltd.
Rotary Kilns | Rotary Dryers | Ball Mills | Crushers – Engineered for Real-World Results