Folded plate drying bed, sludge dryer based on folded plate drying bed and wastewater treatment method

Abstract

The invention relates to a folded plate drying bed, which comprises a folded plate, a turning and throwing mechanism and a hot air blowing mechanism, vent holes are formed in the folded plate, the turning and throwing mechanism comprises a cantilever, a scraping plate and a driving mechanism, the folded plate is in a circular ring shape, and the driving mechanism comprises a transmission shaft arranged on the central axis of the folded plate and a transmission device for driving the transmission shaft to rotate, a cantilever is fixed on the transmission shaft along the radial direction of the folded plates, a plurality of layers of folded plate drying beds are arranged in the drying device shell from top to bottom along the transmission shaft, the top of the drying device shell is provided with an exhaust window and a feeding pipe, a discharge collecting hopper is arranged below the bottommost folded plate, the discharge collecting hopper is communicated with a conveying device below through a pipeline, and the conveying device conveys the dried material to the outside of the drying device shell. The folded plate drying bed is simple in structure, convenient to operate, low in cost, low in energy consumption, stable in operation, high in sludge drying degree, constant in sludge treatment capacity and small in occupied area, and the size of the sludge drying device can be adjusted according to actual conditions.

Description

technical field [0001] The invention relates to the technical field of sludge drying and environmental protection, in particular to a folding plate drying bed, a sludge dryer and a wastewater treatment method based on it. Background technique [0002] At present, fecal sewage in hotels, villas, tourist attractions, and high-speed service areas far away from urban areas in China only treats the water part, and the solid sludge is not treated. It is only regularly cleaned and collected, and transported to the city for centralized disposal; [0003] Part of the solids after the treatment of public toilet sewage in the field are buried on the spot. The germs contained in the solids are likely to cause environmental pollution, seriously enter the biological chain, and affect human health. [0004] At present, there is also a rotary disc-type sludge drying device in the prior art, but the rotary disc is a flat plate structure, and the sludge drying rate is slow. The sludge can onl...

AI Technical Summary

Problems solved by technology

[0005] At present, the steps for harmless treatment of septic tanks and sewage sludge in public toilets in China include preliminary degradation of sludge and separation with grids Remove stones, fibers, and large particle slag, and then carry out flocculation and dehydration. The dehydrated solids are used as organic fertilizers. Generally, due to incomplete degradation in the natural state of septic tanks or underground pipe networks, solids Some pathogenic bacteria, fecal coliform group, roundworm eggs, etc. in the fertilizer have not been killed, exceeding the standards for use in organic fertilizers; and after dehydration, the solid content is low, and the material is still in a slurry state. On the one hand, it is easy to escape, emit, drip, and leak during transportation. , the transportation volume is large, the transportation cost is high, and the other party directly dries and sterilizes the slurry sludge with high energy consumption and slow speed

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