Low-temperature condensation drying system for sludge granulation and sludge drying method

Abstract

The invention discloses a low-temperature condensation drying system for sludge granulation, which comprises a sludge drying system and a condensation heat exchange system, and the sludge drying system comprises a wet sludge feeding system, a wet sludge crushing system, a wet sludge drying system, a dry sludge discharging system and a circulating fan. The wet sludge crushing system is arranged atone side of the wet sludge feeding system. The wet sludge drying system is arranged below the wet sludge crushing system. The dry sludge discharging system is arranged at the bottom of the wet sludgedrying system on the side far away from the wet sludge crushing system. A plurality of air inlets are arranged below the wet mud drying system, the air inlets are all connected with the circulating fan, a plurality of exhaust ports are arranged above the wet sludge drying system, the exhaust ports are connected through a first exhaust pipe, the condensation heat exchange system comprises a coolingsystem and a gas drying system, the cooling system comprises a surface cooler and a plate heat exchanger, the other end of the surface cooler is provided with a condensation tower, the plate heat exchanger is arranged below the surface cooler, and the gas drying system comprises an evaporator and a condenser.

Description

technical field [0001] The invention relates to the field of sludge drying, in particular to a low-temperature condensation drying system for sludge granulation and a sludge drying method. Background technique [0002] Sludge treatment: Concentrating, tempering, dehydrating, stabilizing, drying or incinerating sludge to reduce, stabilize and harmless the process. There are many drying methods and equipment for sludge, among which thermal drying is a relatively common one. In the prior art, the thermal drying of sludge is basically dried by a heating device, and the sludge is wet. There is a large amount of water vapor inside, and heating by the heating device is likely to cause waste of resources; and the volume of the drying equipment is large, occupying a lot of ground, which is likely to cause waste of space; the volume of the drying equipment is also limited, and it cannot be continuously and continuously dried. Dry, low production efficiency. Contents of the inventio...

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Problems solved by technology

There are many drying methods and equipment for sludge, among which thermal drying is a relatively common one. In the prior art, the thermal drying of sludge is basically dried by a heating device, and the sludge is wet. There is a large amount of water vapor inside, and heating by the heating device is likely to cause waste of resources; and the volume of the drying equipment is large, occupying a lot of ground, which is likely to cause waste of space; the volume of the drying equipment is also limited, and it cannot be continuously and continuously dried. dry, low productivity

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