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Technical achievements
Cement kiln co-processing urban sludge

1. Dry the sludge by flue gas

The sludge is dried by cement waste heat, which result in the moisture decreased. After the semi-desiccation pretreatment, the sludge is prepared into granular sludge which can used in the calciner as alternative fuel. The gas is treated by deodorization system before exhaust.

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2. Indirect dry the sludge by flue gas

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The cement waste heat is used as heat source, which convert the heat to the heat medium by the heat transfer device. The heat carrier medium transfer heat to the dryer. The sludge is heated in the dryer for dehydration, after that the sludge is prepared as alternative fuel. Non-condensable exhaust that made from the spray condensation of the drying gas get into the cement kiln for high temperature incineration. The condensate water is recycled and discharged after sewage treatment.


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                  Sludge before drying                             Sludge after drying

The sludge drying technology can achieve 100 ~ 1000t/d general contracting of sludge drying system and provide the technical support services.



3. Kiln disposal of sludge

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The sludge is pumped into the cement kiln system through the conveyor and professional pump.

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For the special sludge which is deep dehydrated or is of low moisture can be import into the cement kiln by scatter device.



4. Chemistry, mechanical deep dehydration technology of sludge

Dehydrate the wet sludge into semi-dry sludge by self-developed formulations and dehydration equipment, which can link with the downstream process.


It can choose the right sludge treatment technology or mix them up from the types of technology mentioned above according to the sludge production, throughput requirements and capacity of the cement kiln.



5. Odour treatment

It is necessary to choose different technologies for different disposal sections and processes in order to ensure a reasonable and effective treatment.

1) the wet sludge volatile gas generated from the receiving and storage plant of sludge

According to the characteristics of cement kiln to collect into the kiln incineration.

2) the odour generated by the drying process

It can choose a chemical technology, biological deodorant or chemical combine with biological deodorant technology.

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