Discharged material cooling heat recovery sludge low-temperature drying device and control method thereof

Abstract

The invention discloses a discharged material cooling heat recovery sludge low-temperature drying device. The device comprises a drying box body, a sludge inlet formed in the top of one end of the drying box body and a sludge outlet formed in the bottom of the other end of the drying box body; a mesh belt group is arranged in the drying box body from the sludge inlet to the sludge outlet. The device is characterized in that: at least a plurality of dehumidification modules are arranged around the mesh belt group in the conveying direction of the mesh belt group; and a cooling heat recovery module for reducing the temperature of discharged sludge and recovering heat of the discharged sludge is arranged around the mesh belt group at the position close to the sludge outlet. Sludge at a lower-layer discharging end is cooled to the normal temperature or below through the cooling heat recovery module, so that sludge fermentation and odor emission are reduced; meanwhile, heat of lower-layer discharged sludge is recovered into upper-layer fed sludge, so that the risk of spontaneous combustion caused by heat accumulation in organic drying sludge is completely eradicated, and meanwhile the running efficiency of a system is improved.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a low-temperature drying device for discharging cooling heat recovery sludge and a control method thereof. Background technique [0002] Wastewater treatment of industrial enterprises and municipal domestic sewage treatment will produce sludge. According to the composition and properties of sludge, it can generally be divided into two categories: organic sludge and inorganic sludge. Sludge is a by-product produced in the process of sewage and wastewater treatment. It is a concentrate after the transfer of pollutants in sewage and wastewater, and often contains toxic and harmful substances or odors. Regardless of whether it is organic sludge or inorganic sludge, the moisture content of the sludge after mechanical dehydration in the factory is about 65-90%. It has a large volume and weight, and the risk of environmental pollution is high. These sludges basically need to b...

AI Technical Summary

Problems solved by technology

[0006] For this reason, the present invention provides a low-temperature drying device for discharging cooling heat recovery sludge and its control method to solve the problem of odor volatilization and heat accumulation inside the pile after drying in the prior art. Problems with a risk of spontaneous combustion

Images