Box type harmless treatment oven

Abstract

The box-type harmless treatment baking furnace includes: a frame body; a mixed material silo arranged on the frame body, the bottom of the mixed material silo is provided with a closable opening; fixed on the frame body A plurality of firing boxes, the firing boxes are arranged in succession; the bottom of the baking box is open, and the frame body is provided with a reversible grate bar at the bottom of the baking box and a The bellows below the grate, the bellows are connected with the baking box, the bottom of the bellows is open and a discharge control valve is set, the bellows are communicated with the air pipe through the pipeline; it is arranged on the frame and along the The track extending in the direction of the firing box, the track is located on both sides of the baking box and one end extends to the bottom of the mixed material silo; a cloth cart that can move along the track; can move along the track A moving ignition train; an outfeed conveyor located below said bellows. The roasting furnace of the invention has low energy consumption, can be roasted continuously, and has high efficiency.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment equipment, and in particular relates to a roasting furnace for harmless treatment of urban sludge. Background technique [0002] A large amount of sludge will be produced in the process of sewage treatment, which accounts for about 0.3-0.5% of the treated water (calculated with a water content of 97%). Activated sludge in urban sewage treatment plants is an aggregate composed of bacterial micelles formed by various microorganisms and organic and inorganic substances adsorbed, which contains a large amount of organic substances, inorganic salts, heavy metals, pathogenic microorganisms, and parasite eggs. Due to the complex composition of sludge, the choice of treatment and disposal methods is very important. Improper disposal will cause serious environmental pollution. In recent years, with the continuous improvement of my country's urban sewage treatment rate, the sludge production has a...

AI Technical Summary

Problems solved by technology

Among the above methods, incineration will produce a large amount of flue gas, which will easily pollute the surrounding environment. The technology of fermenting fertilizer or making building materials is not yet mature, and the cost is high. Therefore, landfill is currently the most commonly used method in China. Sludge Treatment

However, due to the heavy metals contained in the sludge, the heavy metals will not decompose on their own during the sludge treatment process. After the sludge is landfilled, due to the excessive deposition of heavy metals, the content of heavy metals in the soil is significantly higher than the original content, which further causes the deterioration of the quality of the ecological environment. Even It will cause heavy metal pollution in agricultural products and aquaculture, and cause damage to human health

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