Method for drying water-contained garbage by using afterheat of cement kiln system

Abstract

The invention discloses a method for drying water-contained garbage by using afterheat of a cement kiln system. The method is to use tail gas having the afterheat in the cement kiln system for heating the water-contained garbage; and the water-contained garbage is heated for drying to form dried garbage. The cement kiln system comprises a cement kiln, a grate cooler and a generator; the cement kiln is provided with a decomposition furnace; the decomposition furnace is provided with a first-grade preheater; the heating of the water-contained garbage by using the tail gas having the afterheat in the cement kiln system is to lead out the tail gas having the afterheat in the first-grade preheater for heating the water-contained garbage, to lead out the tail gas having the afterheat in a low-temperature section of the grate cooler for heating the water-contained garbage and to lead out the tail gas having the afterheat in the generator for heating the water-contained garbage. The method can fully use abundant afterheat resource of the cement kiln for drying the water-contained garbage, can save a lot of energy for drying the water-contained garbage, shortens the drying time, decreases the drying floor area, and quickly improves the garbage wet base heat value.

Description

technical field [0001] The invention relates to a method and equipment for drying water-containing garbage, in particular to a method for drying water-containing garbage by utilizing waste heat of a cement kiln system. 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. As early as 1996, the volume of urban waste removal in China had reached 100 million tons, and it was growing at a rate of 8% to 10% every year. The annual accumulation of garbage has reached more than 6 billion tons, and more than 200 cities across the country have been surrounded by garbage, and the land area occupied by garbage accumulation has reached more than 500 million square meters. [0003] Incineration technology is considered to be one of the most effective means to realize the harmlessness, reduction and recycling of u...

AI Technical Summary

Problems solved by technology

[0005] On the other hand, due to the huge amount of waste heat generated by the cement kiln system, it has not been fully utilized, and the hot air with hundreds of degrees Celsius can only be discharged into the sky through the chimney. In this way, a large amount of waste heat is wasted in vain

It is not easy to use these waste heat. After a large number of patent searches, no method and equipment for drying water-containing waste using the waste heat of the cement kiln system have been found.

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