Effect improving method for progressive and classified pyrolysis and energy gathering of waste

Abstract

The invention discloses an effect improving method for progressive and classified pyrolysis and energy gathering of waste. The method aims to overcome the defects that in an existing waste pyrolysis process, dioxin is likely to be generated, the environment is polluted, the pyrolysis effect is poor, auxiliary energy consumption is needed, and the construction and operation cost of a project is high. The method comprises the steps that firstly, hot air at the temperature below 300 DEG C is introduced into waste for pyrolysis, and gas phase combustible organic matter is guided out; then the gas phase combustible organic matter is mixed with hot air at the temperature of 500 DEG C, obtained combustible smoke and the guided gas phase combustible organic matter are mixed with hot air at the temperature of 600 DEG C for incineration and pyrolysis, and heat exchange is conducted between obtained high-temperature flame gas and air; and the obtained hot air is input into the step a, the step b and the step c for utilization. The method is mainly used for harmless environment-friendly treatment of household waste and medical waste, the situation that the dioxin is generated during waste pyrolysis, and accordingly the environment is polluted can be avoided, and heat energy generated during waste pyrolysis is used for classified waste incineration and pyrolysis in the hot air mode; the energy is greatly saved, the effect is good, the efficiency is high, the investment is reduced, and the practicability is high.

Description

technical field [0001] The invention relates to a treatment method mainly used for domestic waste and medical waste, in particular to a method for progressively grading pyrolysis, gathering energy and increasing efficiency of waste. Background technique [0002] Waste incineration pyrolysis is a high-temperature thermochemical treatment technology. The combustible components in the waste react with oxygen in the air in the incinerator and are converted into high-temperature gases and solid residues. The pyrolysis process of waste incineration produces a large amount of heat energy, which can reduce the volume by 80%-90%. It can destroy the composition and structure of harmful solid waste, kill pathogenic bacteria, and achieve the purpose of detoxification and detoxification. It has the advantages of reduction, harmlessness, and resource utilization. It is one of the waste treatment methods widely used in developed countries. In Japan and other countries where arable land is ...

AI Technical Summary

Problems solved by technology

[0003] One is that the existing waste incineration pyrolysis process will generate a large amount of dioxins, and the processing of the generated dioxins is difficult and expensive

Although the research and understanding of dioxin-like substances have been deepened in recent years, technically through the "3T" control of incinerators and strict incineration flue gas purification process, the emission of dioxin-like substances can be controlled within strict standards However, the one-time investment and operating costs are greatly increased, and the dioxin-like substances removed by flue gas purification have secondary pollution

[0004] Second, the existing waste incineration pyrolysis requires a lot of auxiliary energy, but the utilization efficiency of the heat generated by waste incineration itself is not high enough, resulting in high cost of waste incineration

[0005] Third, the one-time investment in the construction of the incineration plant is huge, and the project construction takes up a long period of funds

However, these technologies have a large one-time investment, high operating costs, unsatisfactory effects, and poor practicability