Greenhouse-heat collector-type solar sludge drying system and method

Abstract

The invention relates to a greenhouse-heat collector-type solar sludge drying system and method. The system comprises a feed bin (11), a solar greenhouse (2), a solar air collector (1), a duct fan (3), ventilation equipment and a three-way pipe, wherein a first end of the three-way pipe is communicated with outside atmospheric air through a first valve (14), a second end of the three-way pipe is communicated with the solar greenhouse (2) through a second valve (15), and a third end of the three-way pipe is communicated with the hot air inlet of the solar air collector (1); the hot air outlet of the solar air collector (1) is communicated with the hot air inlet of the solar greenhouse through the duct fan (3); a heat storage layer is laid on the bottom surface of the solar greenhouse; and a spreader and sludge turning equipment are also arranged in the solar greenhouse. The greenhouse-heat collector-type solar sludge drying system has the advantages of low operating cost, zero discharge, good technical effect and capability of industrial automated operation, thus playing a positive role in supporting reduction and resource utilization of sludge.

Description

technical field [0001] The invention relates to a greenhouse-heat collector type solar drying sludge system and method, and belongs to the technical field of sludge drying and disposal. Background technique [0002] At present, my country has nearly a thousand waterworks and sewage treatment plants that have been built, are under construction, and are planned to be built. These water plants will produce a large amount of sludge during their operation, and their scientific treatment and utilization have become an urgent problem to be solved. The key to resource utilization of sludge is firstly to remove the water inside the sludge and realize the reduction at the same time. After the sludge is dried, its negative characteristics such as odor, pathogens, viscosity, and instability are significantly improved, and it can be used for landfill, incineration, composting, and preparation of building materials. Since the 1990s, the use of dehydration and drying technology to treat s...

AI Technical Summary

Problems solved by technology

However, only relying on the greenhouse to absorb solar energy, the temperature difference between day and night is large, and the drying speed is slow

[0006] The authorized publication number is CN 101216243A patent "Using Solar Energy Drying Sludge System". This system is a collector type solar drying system. The sludge in the box can only be dried after secondary exchange, and the heat transfer oil should pay attention to the leakage problem in engineering applications, and the air in the drying box is in a state of natural flow, so the drying effect will not be very good

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