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Henan Hongke Heavy Machinery Co., Ltd. recently completed a sludge incineration project in Jiangxi, China. We supplied a Φ3.5×50m rotary kiln for a local waste treatment facility. Here's what we did.
The Problem: Too Much Wet Sludge
Our customer runs a waste treatment plant handling sludge from local municipal wastewater plants and industrial facilities. Sludge is wet (about 80% water), sticky, and costly to get rid of. Landfilling was getting expensive, and environmental rules were tightening.
They needed a better solution—something that could:
Dry and burn the sludge efficiently
Reduce volume by over 90%
Meet strict emission limits
Run continuously with minimal downtime
What We Supplied
We designed a Φ3.5×50m rotary kiln system specifically for this job. It's a full incineration line, not just a kiln.
| Key Spec | Value |
|---|---|
| Diameter | 3.5 m |
| Length | 50 m |
| Operating temp | 850–1,200°C |
| Drive | Heavy-duty gear with backup motor |
| Seals | Labyrinth with air purge |
What's included:
Kiln body with high-alumina refractory lining
Feeder system for semi-dried sludge
Multi-fuel burner (coal or gas)
Secondary combustion chamber for gas cleanup
Dust collector (cyclone + bag filter)
PLC control panel with zone temperature monitoring
How It Works
| Stage | Temp | What Happens |
|---|---|---|
| Drying/Heating | Up to 800°C | Moisture evaporates, organics start to break down |
| Incineration | 850–1,200°C | Organics burn completely, pathogens destroyed |
| Gas treatment | 950°C+ | Secondary chamber destroys volatiles and dioxins |
| Dust removal | — | Cyclone + bag filter clean exhaust gases |
Why This Kiln Works for Sludge
| Feature | Why It Matters |
|---|---|
| Long 50m length | Enough residence time for complete burnout |
| High temp | Destroys organics and pathogens |
| Multi-fuel burner | Can run on gas or coal—flexible |
| Good seals | Keeps heat in, dust out |
| Secondary chamber | Cleans up harmful gases before they leave the stack |
Results
Once running, this system will:
Cut sludge volume by 90%+ – less to landfill
Meet environmental rules – emissions controlled
Run 24/7 – minimal stops
Produce ash – which can be used in construction materials
Who We Are
Henan Hongke Heavy Machinery Co., Ltd. has been making kilns, dryers, ball mills, and crushers since 2006. We design, build, and support equipment for customers worldwide.
Bottom Line
This Φ3.5×50m kiln turns a messy, costly waste problem into a clean, compliant operation. It handles wet, sticky sludge, burns it completely, and cuts disposal costs dramatically.
Got sludge? Talk to us.
Contact Henan Hongke Heavy Machinery Co., Ltd. – we deliver equipment that works.
Henan Hongke Heavy Machinery Co., Ltd.
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