Sludge is the industrial waste generated during the production process of municipal sewage processing. Because sludge has many disadvantages such as high moisture content, high viscosity, high water holding capacity, and low calorific value, it is difficult to achieve industrial utilization. Dingli Company operated a series of technical researches on the current market situation of sludge treatment and the characteristics of sludge in various regions.

Dingli Company concentrating created a new generation of sludge rotary drum drying system, drying product moisture can be reduced to less than 25%, achieving the standard of sludge landfill and further incineration processing conditions. The technology of equipment gets absolutely mature enough, also it has a stable capacity for operation and very convenient to operate and maintain.





DINGLI Sludge Drum Dryer is mainly composed of hot air furnace, scattering feeder, belt conveyor, rotary drum dryer, belt outlet conveyor, draught fan, dust collector, deodorant device and electric cabinet. The working principle of the sludge drying equipment as following: About 80% of the moisture content for the wet sludge has stickiness. Before the drying process, it first enters three-roller belt-dewatering machines, and the sludge moisture removed to 55-60%. After entering the rotary drum dryer and drying, the wet sludge enters the tumble dryer and spitting into the following six drying work areas: The first is the material feedstock zone. The wet mud enters this zone and contacts the high-temperature hot air to rapidly evaporate moisture. The material is in a large lifting flight angle. Under the lifting flight drop and pick up, it will be introduced into the next working area without forming a bond. Second, the cleanup area will repeatedly break and beat the material. In this area, the equipment is designed to break and beat all of the material by the cleaning device, and the wet mud is picked up and beaten by the grating copy board. After a large amount of wet mud is repeatedly crushed and beaten, it is broken and kneaded into 20-40mm pellets of coal slime to form the state of the material curtain, increasing the heat exchange area, increasing the drying rate, and the cleaning device reasonably cleans the mud adhered to the inner wall and prevent the wet mud from sticking. Thirdly, in the main drying zone, the wet mud that has been conducted in the second zone has been in a state of loose granularity. The material is picked up by the radial slanting flight on cascade uniformity, and it conducted full heat exchange with the hot air. Fourthly, It is beaten and broken Drying zone, where the mud is repeatedly beaten and broken, the mud particles are broken from 20-40mm to 10-20mm (customer requirements granularity), the moisture is further reduced; Fifth, the enhanced drying zone, the broken small granular mud is dense in the area from the copy board which is lifted to fully absorb the heat of the hot air and discharge the moisture to get the water requirement and prepare the material for discharge. The sixth is the outlet material. To prevent the discharge of dust, the rotary drum did not provide with lifting flight in this area, and the material is rolled and glided to the discharge opening. , The moisture of Sludge dropped to about 20-25% to dryer out, and finally complete the whole drying process.

The main structure of the equipment

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Equipment Capacity(t/h) Evaporation moisture capacity(t/h) Moisture content of raw material(%) Drop moisture content(%) Drying Temperature (℃) Total installation power(kw) Total Weight (kg) Spatial footprint(m²)
DLNG1412 5.4 1.2 55-60% 20%(adjustable) 850±100℃ 65 25000 6m*18m
DLNG1615 6.6 1.9 115 48000 6m*18m
DLNG1916 13.5 3.0 138 67000 8m*24m
DLNG2218 19.8 4.4 170 85000 10m*24m
DLNG2518 25.6 5.7 240 92000 10m*30m
DLNG2522 31.5 7.0 320 110000 10m*36m
DLNG2823 41.4 9.2 450 150000 10m*36m
DLNG3430 80.0 17.7 680 265000 10m*48m




  • Q:What's your business model? Trading company or factory?

    We are a 15 years factory, all our machinery are manufactured by ourselves, factory direct sales, product quality and after-sales service can be guarantee.

  • Q:Can I visit your factory?

    Yes. Many domestic and international customers visit our factory every year. Our company is located in Zhengzhou Henan province, China, you can come here by air or train. The nearest airport is Zhengzhou Xinzheng International Airport, and the Airport Code is CGO. We will pick you up at airport. Welcome to visit our factory.

  • Q:What is the Quality of your products?

    Dingli Group products come with best quality, and our products passed CE certification, exported to lots countries around the word, such as Australia, Malaysia, India, Italy ,Indonesia, Vietnam, Philippines, Korea, Brazil, Argentina, Russia, South Africa, etc. You can rest assured with the quality absolutely.

  • Q:What is the process for purchasing equipment?

    Contact customer service - understand the basic situation - equipment quota-tion - sign contract - equipment production

  • Q:Do you provide after-sale service?

    Contact customer service - understand the basic situation - equipment quota-tion - sign contract - equipment production