Method for preparing fuel oil by performing microwave cracking on garbage

Abstract

The invention discloses a method for preparing fuel oil by performing microwave cracking on garbage. The method comprises the following steps of: 1) pretreating garbage to obtain structured garbage suitable for microwave cracking; 2) performing microwave cracking on the garbage; 3) discharging cracked gas generated by cracking, spraying by using water and cooling, separating out liquid and gas, and filtering liquid to remove impurities; and 4) separating out tar and water from the liquid subject to the impurity removal by using an oil water separator, and distilling the tar at normal pressure to obtain oil with different distillation ranges, wherein the fraction with the distillation range of less than 120 DEG C is the prepared fuel oil. The garbage is treated by microwave heating, so that the garbage is cracked at a high temperature and recovered to prepare the fuel oil. The method is simple to operate and high in resource utilization ratio. The obtained fuel oil has the same index requirement as the standard 2# fuel and high oil quality, can obviously reduce environmental pollution caused by the garbage and realizes harmless treatment on the garbage.

Description

technical field [0001] The invention relates to garbage treatment technology, in particular to a method for preparing fuel oil from gas generated by high-temperature pyrolysis of garbage based on microwave heating, and belongs to the technical field of garbage treatment and resource utilization. [0002] Background technique [0003] With the increasing level of urbanization, municipal solid waste disposal has become a worldwide problem. There are three main ways to deal with garbage: landfill, incineration and composting. Landfill method: the biggest advantage is that the treatment cost is relatively low, and the practical value gradually decreases due to environmental pollution and occupation of a large amount of land resources; composting method: the treatment cost is low, but the composting process is difficult to control, and there is a greater risk of secondary pollution to the environment Incomplete utilization of organic matter, complex fertilizer components, small...

AI Technical Summary

Problems solved by technology

However, domestic waste incineration technology is still in the development and research stage, the technology maturity is relatively low, and the equipment operation effect is poor. The average waste electric energy heat recovery rate is 5% to 8%, the highest is 10%, and the waste volume reduction rate is 60%. % to 80%, all indicators fail to meet the design requirements for a long time

[0004] However, the defects of the current incineration method are also becoming more and more prominent, such as the emission of dioxins has not reached the standard for a long time; The combustion-supporting substance coal or heavy oil, the addition amount is as high as 30% to 60%, which greatly increases the operation and treatment cost; the content of floating matter and high-priced heavy metal oxides in the exhaust gas is high, and the emission cannot meet the standard for a long time; the investment is large and the capital recovery period is long. Even if the government The subsidy fee is 90-120 yuan / ton, and it is still operating at a loss, which hinders the development and application of the entire technology

[0005] In short, my country's waste treatment technology still has the defects of large area, serious environmental pollution, and low resource recycling rate.

Although some foreign treatment methods have been introduced in recent years, they are not suitable for the garbage characteristics of "high humidity and high cabinet residue" in my country.

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