Sludge drying-carbonization combined heat treatment equipment

Abstract

The invention discloses sludge drying-carbonization combined heat treatment equipment which comprises a drying furnace and a carbonization furnace. The discharging end of the drying furnace is communicated with the feeding end of the carbonization furnace through a spiral feeder. Materials are dried by the drying furnace and then are fed to the carbonization furnace for carbonization treatment through the spiral feeder. The materials are crushed in the drying furnace by designing a class I material crushing cutter and a class II material crushing cutter. The carbonization furnace comprises aninner furnace body and an outer furnace body, and the inner furnace body is rotatably connected into the outer furnace body. A first material shoveling plate and a plurality of second material shoveling plates are designed in the carbonization furnace, so that mixing and crushing of materials are increased. By adopting the sludge heat treatment equipment formed by the drying furnace and the carbonization furnace disclosed by the invention, sludge can be effectively dried and carbonized, and the heat treatment effect is remarkably improved.

Description

technical field [0001] The invention relates to the field of sludge heat treatment and recovery, in particular to a sludge drying and carbonization combined heat treatment equipment. Background technique [0002] Sewage treatment plant sludge is the product of sewage treatment, including several parts such as microbial populations, organic substances and inorganic substances. After every 10,000 cubic meters of sewage treatment, about 5 to 10 tons of sludge (based on a moisture content of 80%) will be produced. Sludge contains toxic and harmful substances such as pathogens, heavy metals, and persistent organic matter. Without effective treatment and disposal, it is very easy to cause secondary pollution to groundwater and soil, directly threatening environmental safety and public health, and greatly improving the environmental benefits of sewage treatment facilities. reduce. [0003] Sludge recycling is one of the mainstream trends in the development of sludge treatment and...

AI Technical Summary

Problems solved by technology

[0007] 1. When the sludge material is fed into the drying furnace body, it is easy to accumulate and block the feeding end of the material drying chamber. The main reason is that the sludge material is relatively viscous;

[0008] 2. During the drying process of the drying furnace, the sludge material cannot be effectively crushed, and the high temperature causes the sludge material to gather to form a hard block, resulting in insufficient sludge drying;

[0009] 3. The dried material in the drying furnace cannot be fully discharged from the discharge end of the material drying chamber, and the sludge is easily blocked at the discharge end of the material drying chamber

[0010] 4. The carbonization furnace cannot efficiently feed and stir the heat-treated dry sludge, resulting in insufficient carbonization of the sludge, especially the agglomerated sludge material, which requires secondary carbonization treatment for the sludge material

[0011] 5. Traditional sludge drying is to add crushing equipment to the front of the drying furnace to break the sludge, which not only increases energy consumption but also takes a long process, and the cost of process equipment is relatively high

[0012] 6. During carbonization, in order to form a negative pressure and oxygen-free environment in the furnace, an induced draft fan is usually used to discharge the pyrolysis gas in the carbonization furnace, which causes a large amount of pyrolysis gas to be discharged quickly, and the pyrolysis gas in the furnace cannot be effectively used Carry out carbonization

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