Indirect thermal-desorption device for sludge

Abstract

The invention relates to an indirect thermal-desorption device for sludge. The indirect thermal-desorption device comprises a thermal-desorption chamber, a combustion chamber, a head box, a tail box and a hollow stirring shaft, wherein the combustion chamber is arranged at the bottom part of the thermal-desorption chamber; a flue-gas outlet of the combustion chamber is communicated with a flue-gasinlet of the tail box; the head box is arranged at the head end of the thermal-desorption chamber; the tail box is arranged at the tail end of the thermal-desorption chamber; the hollow stirring shaft penetrates through the thermal-desorption chamber, and the two ends of the hollow stirring shaft are respectively arranged in the head box and the tail box. The indirect thermal-desorption device has the advantages that the heat transfer area is large, the heating temperature is high, the heat utilization ratio is high, the treatment range is wide, and the heat is transferred simultaneously whenthe sludge is extruded and stirred, so that the indirect thermal-desorption device is especially applicable to treatment for sludge with high water content and high viscosity.

Description

technical field [0001] The invention relates to a sludge thermal desorption and desorption device, in particular to a sludge indirect thermal desorption device, which belongs to the technical field of sludge restoration. Background technique [0002] Sludge treatment has always been a worldwide problem. With the improvement of environmental protection laws and regulations, it has become particularly important for sludge economical and environmentally friendly treatment. The original sludge treatment methods are no longer suitable for new requirements. New sludge treatment devices It seems very necessary. Because the sludge itself has the characteristics of high water content, high viscosity, and various types of pollutants, the sludge is not easy to handle. At present, the methods of sludge treatment usually include sludge thermal drying method, sludge incineration method, sludge composting method, sludge power plant co-combustion method and lime drying method, etc. Among t...

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Problems solved by technology

Although this equipment uses hollow paddles to dry the soil, it mainly uses water vapor to enter the paddles to exchange heat with the sludge. The temperature of the steam itself is limited. At present, it is mainly used to dry the soil itself, due to the rising of the soil itself. The temperature is low, and it is difficult to volatilize oily substances from the soil. For the treatment of some oily sludge, this type of equipment has almost no effect, and a large amount of condensed water will be produced during the entire drying process.

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