Sludge drying system with nitrogen protecting function

• Main Authors: CHEN YANG, JIA DONGHUI, ZHAO YIWU, TAO WEIKE, WANG XIN, ZHOU HUATANG, LI YAOCAI, XU XIANWEN
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2014
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The utility model relates to a sludge drying system with a nitrogen protecting function. The system comprises a preheating feeding unit, a drying unit and a cooling and discharging unit which are sequentially connected, wherein the drying system further comprises a first nitrogen source; the drying unit is provided with a first nitrogen input port and an exhaust gas output port; the first nitrogen input port is connected with the nitrogen output port of the first nitrogen source through a first gas inlet pipeline, and the first gas inlet pipeline is provided with a blowing draught fan. By introducing nitrogen to the drying unit, the oxygen content in the drying unit is reduced so as to effectively prevent dust and volatile gases in the drying unit from being contacted with oxygen under a high temperature condition to explode. The system provided by the utility model further has the characteristics of low oxygen content, less environmental influence, high degree of automation, high safety and the like.