Moisture discharge and drying system for sludge

Abstract

The invention provides a moisture discharge and drying system for sludge. The moisture discharge and drying system comprises a drying box and is characterized in that the drying box is provided with a feed inlet, a discharge outlet is formed in the bottom of the drying box, a mesh belt for conveying the sludge is arranged on one side in the drying box, a heat pump condenser is arranged on the other side in the drying box, the mesh belt is separated from the heat pump condenser through a partition, a ventilation opening is formed in the bottom of the partition, the drying box is provided with a circulation fan, and an air supplement port and a moisture discharge outlet are formed in the top of the drying box and connected with a heating circulation mechanism. The moisture discharge and drying system has the advantages that low-temperature drying is used to allow volatile substance content in tail gas to be low, treatment cost is low, the whole drying process is performed in a sealed environment, no odor is discharged to external environments, and environment protection requirements are satisfied; belt type drying equipment is used, electric energy is used as the only energy, the belt type drying equipment is suitable for various types of sludge drying systems, and wide application range is achieved; a two-stage heat recovery process is used to increase the heat utilization efficiency of the drying system.

Description

technical field [0001] The invention belongs to the technical field of sludge drying treatment, and in particular relates to a sludge dehumidification and drying system. Background technique [0002] Existing sludge drying systems are mainly based on rotary disc drying process, paddle drying process, belt drying, fluidized bed drying process, etc.; however, these drying systems mostly use saturated steam, heat conduction Oil and the like are used as heat sources, which have the disadvantages of high energy consumption, limited heat sources, and secondary pollution. The heat pump dehumidification drying device has the advantages of low energy consumption, less pollutant discharge, and is not limited by heat sources; the belt dryer has a simple structure, less maintenance parts, strong adaptability to different sludge, low drying process temperature, and safety. Therefore, it is necessary to design a sludge drying system that effectively combines heat pump energy-saving techn...

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Problems solved by technology

[0002] Existing sludge drying systems are mainly based on rotary disc drying process, paddle drying process, belt drying, fluidized bed drying process, etc.; however, these drying systems mostly use saturated steam, heat conduction Oil, etc. are used as heat sources, which have the disadvantages of high energy consumption, limited heat sources, and secondary pollution

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