Drying device for drying sludge by using flue gas

Abstract

The invention provides a drying device for drying sludge by using flue gas. The invention relates to an environment-friendly treatment device, in particular to a drying device for dynamically drying wet sludge by using high-temperature (120-200 DEG C) flue gas. The drying device comprises a flue gas conveying pipeline and a sludge conveying device. The drying device is characterized by comprising a cylinder body, a hollow shaft, a material conveying spiral and a gas inlet duct communicated with the flue gas conveying pipeline. Aiming at the problems, the invention provides the drying device for online drying wet sludge by using flue gas so as to greatly improve treatment efficiency and reduce environmental pollution.

Description

technical field [0001] The invention relates to environmental protection treatment equipment, in particular to a drying device for dynamically drying wet sludge by using flue gas at high temperature (120-200°C). Background technique [0002] When people treat sewage, they often ignore the treatment of sludge generated after sewage treatment, so the sludge treatment equipment and technology are relatively lagging behind. The traditional sludge treatment method is landfilling, which requires a considerable amount of expense, and there is no guarantee that it will not cause secondary pollution. The second is that the method of roasting is even more unscientific, and roasting requires a lot of heat energy, which does not meet the purpose of energy saving at all, and also causes secondary pollution to the surrounding environment. Due to the unscientific treatment of sludge, incidents of secondary pollution continue to occur, which has been plagued by enterprises and related depa...

AI Technical Summary

Problems solved by technology

The traditional sludge treatment method is landfilling, which requires considerable expenses during the landfilling process, and there is no guarantee that it will not cause secondary pollution.

Second, the method of roasting is even more unscientific, and roasting requires a lot of heat energy, which does not meet the purpose of energy saving at all, and also causes secondary pollution to the surrounding environment

The temperature of the hot exhaust gas discharged from the boiler reaches 140-180°C; it is directly discharged into the atmosphere, on the one hand, a lot of heat energy is wasted, and on the other hand, the particles in the hot exhaust gas will cause great pollution to the environment

[0004] Sewage treatment will produce a lot of organic sludge, which is very troublesome to deal with. If it is directly landfilled, land resources will be tight and there will be no land available.

If it is dried and then landfilled, the drying process requires a large cost

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