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Zoneding Company conducted technical research on sludge treatment, created a new generation of sludge rotary drum drying system that can reduce product moisture to less than 25%, with mature technology and easy operation and maintenance.
Sludge drying is a process to dewater and recycle high-moisture sludge as resource. there are mainly two ways to dry sludge, natural drying and mechanical drying. The latter is more efficient. The removal of water reduces the sludge quality and volume, which is to make it convenient to be store and transport the sludge. With mature and advanced international technology from Europe, etc., Zoneding solution on sludge drying process is based on the properties, like high water content, high organics content, and low specific gravity, etc.

According to different customers’ needs, Zoneding offers sludge drying machine with different heat sources.
Sludge is the semi-solid waste left over from industrial or municipal wastewater treatment processes. Think of it as the thick, muddy material that settles at the bottom of treatment tanks. The biggest problem with sludge is its water content. Fresh sludge can be over 99% water. Even after some mechanical dewatering, it is still often 70% to 80% water.
This high water content makes it very heavy, smelly, and difficult to handle. Hauling and disposing of this wet, heavy material is extremely expensive. The weight is what drives up your transportation and landfill fees. In effect, you are paying a high price to transport and dispose of water. This is the core problem that a sludge management solution must solve.
You should dry your sludge for one primary reason: massive sludge disposal cost reduction. It is a simple equation. Disposal services charge based on weight and volume. When you use a thermal sludge drying process, you evaporate the water. This can reduce the total weight and volume of your sludge by as much as 90%.
Imagine you produce 10 tons of wet sludge (80% water) per day. That means 8 tons of that weight is just water. After drying it to 10% moisture, you are left with just over 2 tons of material to dispose of. Your hauling and disposal costs can drop by 75-80%. This is one of the biggest benefits of sludge drying. It directly impacts your bottom line. Drying also sterilizes the sludge, eliminates foul odors, and creates a stable, easy-to-handle product that is no longer considered hazardous waste.
Drying sludge does more than just reduce waste. It can transform a costly liability into a valuable asset. The dry, granular product has several useful applications. This turns your waste stream into a revenue stream.
A modern industrial sludge dryer is a very versatile machine. It can handle a wide variety of sludge types from different industries. The key is to have a system that can be adjusted for different moisture levels and material characteristics.
At ZONEDING, we design our sludge drying system to handle:
The important thing is to analyze your sludge first. This helps determine the right drying temperature, retention time, and any pre-treatment needed for the best results.
A sludge dryer is a piece of industrial equipment designed specifically for thermal sludge drying. Its job is to use heat to evaporate the water from wet sludge. This leaves behind a dry, solid, granular product. The most common and effective type for this job is the rotary drum dryer. Its design is perfect for continuously processing the sticky and challenging nature of sludge.
A complete sludge drying system is more than just the dryer itself. It includes a feeding system to get the wet sludge into the drum. It has a heat source, like a gas burner or furnace. And It includes a dust collection system to capture fine particles from the exhaust air. It also has a discharge system to cool and convey the final dry product. It is a complete, integrated process.
Produced from sewage disposal, sludge actually can be transformed by special designed sludge dryer equipment into a kind of green fuel and resource. Sludge is an extremely complex heterogeneous material composed of organic fragments, bacteria, inorganic particles, colloids, etc. And Sludge has the characteristics of high moisture, high organic matter content, fine particle and small specific gravity.
Sludge dryer plays a key role in dehydrating and drying wet sludge to a certain moisture. Dried sludge can be used in agriculture to improve the soil, in building materials production to be the raw material of cement and in brick making. Besides, sludge dryer can be used to make biochemical fiberboard.



Applications of Sludge Dryer
It is mainly composed of barrel, supporting device, driving device and sealing device, etc. The working areas include discharging area, lifting board area, cleaning area and feeding area.

What a Sludge Dryer Brings to You?
An efficient use of sludge brings environmental protection as well as over-expected economic benefits.
Ⅰ. Reducing Weight and Volume
Sludge dryer reduces the sludge volume and weight by evaporation of water in it, making it easier to store and transport.
Ⅱ. Stabilize Sludge
Drying can stabilize the sludge, thus reducing the putrid smell and improving the disinfection effect.
Ⅲ. Simplify the Next Process
Either in following sludge disposal or in direct recycle process, sludge drying equipment plays an essential part of boosting the calorific value of sludge, which makes sludge easier to be used as fuel.
There are two commonly used types of sludge dryer machine, single-cylinder rotary sludge dryer and high-viscosity sludge drying equipment.
The first is newly developed from ordinary rotary dryer with cleaning device, breaking device and others inside. For drying material with a certain viscosity and smaller particle size, single-cylinder rotary sludge dryer is the better choice.
The latter usually uses hot-air spiral-blade drying technology with double or three shafts alternative according to the viscosity of the sludge. This drying machine can dry sludge with humidity below 85% to 12% or below just one time. And this drying process takes less time like 2-10 mins.
The heart of an effective industrial sludge dryer is the rotary drum. At ZONEDING, we build these to be extremely tough. The structure consists of a large, slightly inclined steel cylinder that rotates slowly.
Inside the drum, there are a series of specially designed lifters, or “flights.” As the drum rotates, these flights lift the sludge and shower it down through the stream of hot gas. This maximizes contact between the hot air and the sludge particles. We also often include internal crushing devices or chains. These break up the large clumps of sticky sludge as it dries. This prevents the material from forming large, hard balls. This internal design is critical for achieving a uniformly dry final product. The drum is supported by heavy-duty steel tires and trunnion wheels and is driven by a powerful gear and motor system.
| Spec./m (Dia.×Length) | Shell Cubage (m³) | Capacity (t/h) | Installation Obliquity(%) | Highest Inlet Air Temperature(℃) | Main Motor (kw) | Weight (t) |
| Φ1.2×8.0 | 9.0 | 1.9~2.4 | 3~5 | 700~800 | 7.5 | 9 |
| Φ1.2×10 | 11.3 | 2.4~3.0 | 3~5 | 700~800 | 7.5 | 11 |
| Φ1.5×12 | 21.2 | 4.5~5.7 | 3~5 | 700~800 | 15 | 18.5 |
| Φ1.5×14 | 24.7 | 5.3~6.6 | 3~5 | 700~800 | 15 | 19.7 |
| Φ1.5×15 | 26.5 | 5.7~7.1 | 3~5 | 700~800 | 15 | 20.5 |
| Φ1.8×12 | 30.5 | 6.5~8.1 | 3~5 | 700~800 | 18.5 | 21.5 |
| Φ1.8×14 | 35.6 | 7.6~9.5 | 3~5 | 700~800 | 18.5 | 23 |
| Φ2.2×12 | 45.6 | 9.7~12.2 | 3~5 | 700~800 | 22 | 33.5 |
| Φ2.2×14 | 53.2 | 11.4~14.2 | 3~5 | 700~800 | 22 | 36 |
| Φ2.2×16 | 60.8 | 13.0~16.2 | 3~5 | 700~800 | 22 | 38 |
| Φ2.4×14 | 63.3 | 13.5~16.9 | 3~5 | 700~800 | 37 | 45 |
| Φ2.4×18 | 81.4 | 17.4~21.7 | 3~5 | 700~800 | 37 | 49 |
| Φ2.4×20 | 90.4 | 19.3~24.1 | 3~5 | 700~800 | 45 | 54 |
| Φ2.4×22 | 99.5 | 21.2~26.5 | 3~5 | 700~800 | 45 | 58 |
| Φ2.6×24 | 127.4 | 27.2~34.0 | 3~5 | 700~800 | 55 | 73 |
| Φ3.0×20 | 141.3 | 30.1~37.7 | 3~5 | 700~800 | 75 | 85 |
| Φ3.0×25 | 176.6 | 37.7~47.1 | 3~5 | 700~800 | 75 | 95 |
| Φ3.2×25 | 201 | 42.9~53.6 | 3~5 | 700~800 | 90 | 110 |
| Φ3.6×28 | 285 | 60.8~76.0 | 3~5 | 700~800 | 160 | 135 |
Q1. Who are we?
A1: Zoneding Machine is manufacture of mining machine which is located in Henan province of China. We have been professional on grinding mill, stone crushers, sand making machines, production line for ore beneficiation, sand and aggregate industries since 2004.
Q2. What is our main crusher products?
A2: Jaw Crusher/Cone Crusher/Vibrating Screen/Sand Making Machine/Mobile Stone Crusher Plant/Vibrating Feeder/Fine Sand Recovery Machine/Screw Sand Washing Machine/Impact Crusher/Vertical Shaft Impact Crusher/Hammer Crusher/Belt Conveyor/Stone Crushing Plant.
Q3. What about the price ?
A3: We are able to give you competitive price than market one cuz we are factory, and we have a policy that ” for saving time and absolutely honest” business attitude,we quote as low as possible for any customer, and discount can be given according to quantity
Q4. What services can we provide?
A4: Accepted Delivery Terms: FOB, CFR, CIF;
Accepted Payment Currency: USD,EUR, CNY;
Accepted Payment Type: T/T,L/C;
Language Spoken: English,Chinese,Spanish,Arabic,French,Russian
Q5: When will the delivery be?
A5: For inventory goods, we can ship them within 3-5 days. For customized equipment and other devices, we will specify according to clients’ needs as we quote.
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