Sludge storing and preheating system utilizing sludge drying tail gas afterheat

Abstract

The present invention discloses sludge storing and preheating system utilizing the afterheat of sludge drying tail gas. The system consists of one upper part and one lower part, the upper part has a closed sludge storing household, a sludge shifter, a sludge shifter track, a sludge inlet, a sludge outlet and a gas exhaust unit; and the lower part has walls for supporting the bottom of the closed sludge storing household, a flue, a high pressure water pipe, and a water collecting and guiding set. The system with circulating utilization of energy can lower power consumption for drying sludge, reduce cost and lower the pollution load of sludge drying tail gas.

Description

technical field

[0001] The invention relates to a sludge storage and preheating system which utilizes the residual heat of sludge drying tail gas. Background technique

[0002] When urban domestic sewage and industrial wastewater are purified, they will produce sludge equivalent to 0.3% to 0.5% of the volume of sewage or 1% to 2% of the quality of sewage. According to relevant data, by 2010 and 2020, the discharge of urban sewage in my country will reach 440×10 8 m 3 / day and 536×10 8 m 3 / day, which means that with the rapid development of the country's economy and the rapid growth of urban population, the amount of urban sewage is constantly increasing. At the same time, people's requirements for environmental quality are also getting higher and higher. The treatment rate will also continue to increase, and the amount of sludge produced by sewage treatment plants will increase day by day.

[0003] Sewage treatment plant sludge is an extremely complex heterogeneous bod...

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