System for drying and treating sludge by utilizing afterheat to generate high-temperature circulating air

Abstract

The invention relates to a system for drying and treating sludge by utilizing afterheat to generate high-temperature circulating air. The system comprises a sludge drying machine, wherein a sludge spiral conveying core shaft is arranged in the sludge drying machine; a hot circulating air outlet is formed on one side of the sludge drying machine; a sludge feed port is formed at the upper end of one side of the sludge drying machine; a sludge discharge port and a hot circulating air inlet are formed on the other side of the sludge drying machine; and a dried waste gas outlet of the sludge drying machine is formed above one side near the sludge feed port. The system is characterized in that: the dried sludge discharged from the sludge discharge port is conveyed to the feed port above a thermolysis furnace through a conveying belt and an elevator; a smoke outlet of the thermolysis furnace is communicated with a dioxin combustion chamber for decomposing dioxin in the smoke; a high-temperature smoke outlet of the dioxin combustion chamber is connected with a heat exchanger through a high-temperature pipeline; and the cooled smoke is led to a power spray device and a bag-type dust remover to be treated and then is discharged to air through a chimney. The system can heat air by utilizing the high-temperature smoke generated in the sludge burning process to indirectly dry sludge, can recycle hot air, and is economical, practical, energy-saving and environment-friendly.

Description

Technical field [0001] The invention relates to a sludge incineration treatment technology, in particular to a drying system and a drying and processing system for drying the sludge by using the waste heat generated by the sludge incineration. Background technique [0002] There are usually two ways to dispose of sludge: one is the burial method, and the other is the incineration method. Although the burial method does not require huge equipment costs, it does require a vast burial site. As the population continues to increase, the land is decreasing. Today, land is precious and a condition for human survival, and burial can easily pollute groundwater sources, causing serious environmental problems such as secondary pollution. The sludge incineration process burns the sludge into ash, which reduces the amount of waste and avoids water pollution. Therefore, the sludge incineration process has the advantages of obvious reduction, short cycle, and harmlessness, plus the required sit...

AI Technical Summary

Problems solved by technology

[0005] If high-temperature oil and water vapor are used as the heating medium for drying sludge, higher requirements are placed on the manufacturing accuracy, sealing accuracy, and materials of the drying equipment, resulting in increased manufacturing costs.

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