Thermal decomposition treatment method for organic castoff

Abstract

The invention relates to an organic waste pyrolytic treatment method. In the prior art, the energy consumption is high; the cost is large; and the service life of equipment is short. The organic waste pyrolytic treatment method adopts the pyrolytic treatment technique of combination of a pre-pyrolysis section and a secondary pyrolytic section to reutilize heating flue gas exhausted by the pyrolytic section for heating the pre-pyrolysis section according to a two-stage mechanism of pyrolysis. The method comprises the following steps: firstly, organic waste for pyrolysis is crushed according to the feeding demand; secondly, the crushed organic waste for pyrolysis is sent into a pre-pyrolysis device for drying and primary degradation; and thirdly, pre-pyrolysis products are sent into a pyrolytic device for pyrolysis, and oil products, fuel gas and carbon residue generated by the reaction are respectively exhausted. The pyrolytic device is heated through a hot-blast stove and tail gas exhausted by the hot-blast stove is sent into a hot-blast jacket of the pre-pyrolysis section for heating the pre-pyrolysis section section. The organic waste pyrolytic treatment method fully utilizes the caloric content of the flue gas, has obvious energy-saving effect, saves the consumption of high-quality steels and improves the service life of the pyrolytic device.

Description

technical field [0001] The invention belongs to the technical field of organic matter treatment, and the method relates to an organic waste treatment method, in particular to an energy-saving pyrolysis treatment method of organic waste. Background technique [0002] The disposal of organic waste should be based on the principles of recycling, reduction, and harmlessness. In today's social environment where the green GDP continues to grow and the harmonious development of the economy and the environment is advocated, it is imperative to comprehensively treat organic waste as a resource, and energy conservation and emission reduction are increasingly valued in my country. There are many types of organic waste, such as plastic, rubber, bamboo, wood, fabric, sludge, straw, municipal solid waste, oil sludge, waste oil, organic waste liquid, etc. If they are directly incinerated, their heat energy is simply used, and energy utilization The form is single, and it will cause seriou...

AI Technical Summary

Problems solved by technology

However, the pyrolysis of organic waste requires a higher reaction temperature, otherwise the pyrolysis is incomplete and will have a greater impact on the product

The pyrolysis process commonly used at present often adopts indirect heat exchange with high-temperature flue gas. According to different raw materials, the temperature range of the heated flue gas is about 400-1000°C, and the temperature of the exhausted flue gas is also higher, at 300-800°C. range, the energy of the exhausted flue gas is discharged from the device without being fully utilized by the pyrolysis device, resulting in huge energy consumption and low energy utilization efficiency of the pyrolysis device, which greatly hinders the promotion of pyrolysis technology; on the other hand, due to the pyrolysis device Need to withstand high temperature and have special requirements for materials, which makes the device expensive and further hinders the promotion of pyrolysis technology