Solar sludge drying triple-effect device

Abstract

The invention discloses a solar sludge drying triple-effect device which sequentially comprises a heat collector and a drying chamber according to the air intake direction, wherein the drying chamber is connected with the heat collector through an air duct, a feed hopper is arranged above the drying chamber, a discharge hole is arranged below the drying chamber, a sludge conveyor is arranged in the drying chamber, the air duct is provided with an air release valve, a gas furnace is arranged below the drying chamber, the sludge conveyor comprises three layers of conveyor belts from top to bottom and guide rails which are arranged between two adjacent layers of conveyor belts and vertically staggered with each other, and the heat collector comprises a plate-type heat collector, a fan connected with the plate-type heat collector, and a heat pump connected with the plate-type heat collector through the air duct. The sludge drying device adopting the auxiliary heating triple-effect of the solar heat pump is simple in structure, convenient in maintenance, stable in operation, good in dehydration and drying effects, and high in the degree of automation, thus reducing massive consumption of limited natural resources, and secondary pollution to the environment in the sludge treatment process.

Description

technical field [0001] The invention relates to a solar sludge drying triple effect device, which is used for drying treatment of sludge in the water treatment industry. Background technique [0002] At present, the domestic sludge treatment usually landfills the sludge after pressure filtration, and the moisture content of the initially treated sludge is ≥80%, so it takes a lot of land resources, and the final leachate of solid landfill without treatment will be Influx into underground drinking water, affecting human drinking water sanitation. Another commonly used sludge treatment method is to use mechanical drying, mainly including flash evaporation, thin film, spray, multi-effect evaporation and other types, all of which are realized by heat conduction, heat convection and heat radiation, and consume a lot of energy. energy. In order to ensure the safety of the drying system and prevent secondary pollution, certain equipment is required for protection, which greatly in...

AI Technical Summary

Problems solved by technology

[0002] At present, the domestic sludge treatment usually landfills the sludge after pressure filtration. The moisture content of the initially treated sludge is ≥ 80%, so a large amount of land resources will be occupied, and the final leachate of the solid landfill will be destroyed if it is not treated. Influx into underground drinking water, affecting human drinking water sanitation

Another commonly used sludge treatment method is to use mechanical drying, mainly including flash evaporation, thin film, spray, multi-effect evaporation, etc., all of which are realized by heat conduction, heat convection and heat radiation, and consume a lot of energy. energy

In order to ensure the safety of the drying system and prevent secondary pollution, certain equipment is required for protection, which greatly increases the cost of sludge treatment

The one-time investment and high operating costs of sludge drying have discouraged many sewage treatment plants and seriously hindered the process of sludge treatment in small and medium-sized urban sewage treatment plants.

At present, many small and medium-sized sewage treatment plants are "overcrowded with mud", which has caused secondary pollution to the environment

[0003] Other treatment methods, such as using electricity or oil to dry sludge, are costly and expensive to operate, and will also produce certain pollution; the treatment process will generate a lot of stench, which makes people daunting and reduces the final treatment steps of sludge; The development of electronic control is relatively late, resulting in a low degree of automation in sludge treatment. During the operation, the on-duty personnel must be present to supervise

During the sludge treatment process, the outside season and weather change greatly, so it is difficult to operate stably for a long time

[0004] Due to the late development of domestic technology and energy, there are few opportunities to use new energy sources. In the previous sludge treatment process, a large amount of non-renewable resources will be consumed, and the treated waste gas will cause pollution to the atmospheric environment due to no further tracking and treatment.

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