A rotary kiln gasification and plasma melting domestic waste graded gasification system

Abstract

The invention discloses a household garbage classified gasification system with rotary kiln gasification and plasma fusion capability. The household garbage classified gasification system comprises a rubbish feeder, a rotary kiln type pyrolysis vaporizer, a metal sorting machine, a crusher, a high-temperature cyclone separator, an ash hopper, an ash feeder, a plasma fusion furnace and an air preheater; household garbage is sequentially subjected to the pyrolysis gasification, metal sorting and crushing of the rotary kiln type pyrolysis vaporizer and the further gasification treatment of the plasma fusion furnace; the low-temperature rotary kiln vaporizer and the high-temperature plasma fusion furnace can be effectively combined, and the ash generated by pyrolysis and gasification of the rotary kiln vaporizer is fused by virtue of taking plasma torch as a high-quality heat source; the household garbage classified gasification system can effectively take the heat of synthesis gas and the gas fume generated by the fusion furnace as an outer heat source of the rotary kiln vaporizer so as to heat the air entering in the plasma fusion furnace, the comprehensive energy use efficiency is improved, and the secondary pollution problem of dioxin and heavy metal is avoided.

Description

technical field [0001] The invention relates to the melting and gasification technology of solid waste mainly including urban living garbage, more specifically a rotary kiln gasification and plasma melting household garbage graded gasification system. Background technique [0002] With the acceleration of my country's industrialization and urbanization process and the increasing material consumption, the output of municipal solid waste is increasing day by day, and the environmental problems brought about are becoming more and more serious. Compared with the conventional garbage treatment method, the gasification treatment technology of domestic waste has the advantages of high energy recovery utilization rate, small secondary pollution, small flue gas volume, and simple post-processing equipment. However, my country's municipal solid waste has the characteristics of low calorific value, high moisture, and large fluctuations in composition. Its average calorific value is abo...

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Problems solved by technology

[0006] Aiming at the defects and deficiencies existing in the existing domestic garbage plasma gasification melting technology, the present invention provides a rotary kiln gasification and plasma melting ash grading domestic garbage gasification system, which adopts a low-temperature rotary kiln gasifier and a high-temperature plasma melting furnace Combined staged gasification technology, and by using the plasma torch as a high-quality external heat source to melt the ash produced by the pyrolysis and gasification of the rotary kiln gasifier, not only effectively utilize the heat of the synthesis gas and the flue gas generated by the melting furnace As the external heat source of the rotary kiln gasifier and preheating the air entering the plasma melting furnace, the comprehensive utilization efficiency of energy is improved, and the secondary pollution of dioxin and heavy metals is avoided.

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