Rubbish heat drying device and method

Abstract

The invention relates to a rubbish heat drying device and method. The rubbish heat drying device comprises a feeding system, a drying box and a discharging system; the drying box comprises a purging system, a conveying system, a collecting system, a smoke discharging system and a drying box base, and the purging system comprises an air inlet, a smoke chamber, a purging device and a control device; the purging device comprises a plurality of purging needles and a plurality of purging baffles, the multiple purging needles arranged in an array manner are located below the smoke chamber and are communicated with the smoke chamber; and a base of the conveying system is connected with the drying box base to form a middle cavity, and the collecting device is located in the middle cavity. High temperature flue gas generated by a rubbish heat treatment system in the prior art is used and reused to the rubbish pre-treatment drying stage, and a contact type heating manner is adopted for deeply drying rubbish; and the device is simple in structure and high in automatic control degree.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a thermal drying device and method for waste. Background technique [0002] With the continuous expansion of city scale, the increasing urban population and the continuous improvement of people's living standards, the generation of urban domestic waste is gradually increasing. According to the statistics of China Urban Environmental Sanitation Association, in 2010, my country produced nearly 1 billion tons of garbage, of which the output of urban garbage reached 160 million tons, and the output of garbage will grow at an annual rate of 8-10%. It is estimated that by 2015 and 2020, the output of urban waste will reach 260 million tons and 323 million tons respectively. The situation of "garbage siege" is becoming increasingly severe. About 2 / 3 of the cities in the country are surrounded by garbage, and 1 / 4 of the cities have no landfill sites. 30 billio...

AI Technical Summary

Problems solved by technology

In comparison, the drying method can quickly reduce the moisture content of the garbage, so the treatment efficiency is higher. However, the application of thermal drying of garbage is rare. At the same time, because the heat treatment system can generate a large amount of combustion smoke, the temperature is Above 200 ℃, but the heat carried by the flue gas cannot be fully utilized, and can only be discharged into the sky through the chimney, wasting the heat source

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