Method for converting garden waste into matrix material by using superheated steam

Abstract

The invention provides a method for converting garden waste into a matrix material by using superheated steam, and belongs to a waste treatment technology. The method comprises the steps that after areactor is filled with garden waste, the garden waste is heated by using high-temperature superheated steam; the superheated steam makes contact with the garden waste in the reactor, heat is rapidly transferred to the garden waste, the garden waste is rapidly heated and subjected to a selective cracking reaction, most of substances with plant toxicity are degraded, volatile substances generated after the garden waste is subjected to the reaction are discharged out of the reactor along with tail gas, and solid products are separated to be used as a matrix raw material; and the separated tail gas is changed into high-temperature superheated steam through a heating device again to be used for heating the garden waste again, so that the high-temperature superheated steam and the garden waste react. According to the method, the heating efficiency of the pyrolysis process driven by the superheated steam as a heat source is high, and the superheated steam at an outlet can be completely circulated through control and continues to be used as the heat source after being heated again.

Description

technical field [0001] The invention belongs to the technical field of waste treatment, and in particular relates to a method for converting garden waste into matrix materials by utilizing superheated steam. Background technique [0002] The annual output of garden waste is huge, which will cause great pollution to the environment and is not easy to deal with. The traditional pyrolysis technology is to place organic matter in a closed oxygen-free or low-oxygen environment, and convert it into products such as biochar, bio-oil or biogas through a certain temperature and pressure. At present, there are a small number of studies trying to use pyrolysis technology Conversion of biomass into a product that could replace peat, but little research has been done on the use of garden waste as a feedstock. [0003] It is difficult to convert garden waste into matrix raw materials in the existing technology, or in other words, it is impossible to remove certain components in garden wa...

AI Technical Summary

Problems solved by technology

[0003] It is difficult to convert garden waste into matrix raw materials in the existing technology, or it is impossible to remove some components in garden waste in a targeted manner, so that the products produced cannot be used as matrix

Compared with the heating mode of superheated steam, the heating mode of the conventional heat source to the reaction raw material has the disadvantages of low heating efficiency, and the heat cannot be recovered.