Biomass solid clean fuel as well as preparation method and application thereof

Abstract

The invention discloses a biomass solid clean fuel as well as a preparation method and application thereof. A percentage of carbon atoms in the biomass solid clean fuel is 37.15%-50.24%, and the highcalorific value is 13.50 MJ / kg-22.22 MJ / kg; and the clean fuel is prepared by the following steps: sludge and biomass waste are used as raw materials, pre-treatment is performed, acid-base treatment is performed, hydrothermal carbonization treatment is performed, hot press molding is performed, and therefore the clean fuel is prepared. The biomass solid clean fuel disclosed by the invention has the advantages of a high carbon content, a low nitrogen content, a high calorific value, less pollution, simple and easy preparation and low costs, and is a novel clean material; the preparation methodhas the advantages of a simple and easy preparation process, low costs, less energy consumption, short consumed time and conditions easy to control; and the biomass solid clean fuel has the advantagesof simple operation, high energy conversion efficiency and less secondary pollution when being used for combustion to generate energy as a fuel, and the energy clean utilization of the biomass solidclean fuel can be realized.

Description

technical field [0001] The invention belongs to the field of solid fuels, and relates to a biomass solid clean fuel and a preparation method and application thereof. Background technique [0002] Municipal sewage sludge is a solid waste produced in the process of sewage treatment. It has the characteristics of high moisture content, high heavy metal content and high bacterial content, so it is difficult to treat. Today, more than 80% of sludge is still treated by the traditional method of compression dehydration-landfill, and these traditional treatment methods have caused serious secondary pollution and emitted a large amount of greenhouse gases, which greatly offset the emission reduction of sewage treatment As a result, sludge treatment and disposal are faced with the dual pressure of secondary pollution prevention and carbon emission reduction. Not only that, as more sewage treatment plants are built, the amount of sewage sludge produced will also increase day by day. ...

AI Technical Summary

Problems solved by technology

Hydrothermal gasification and hydrothermal liquefaction need to be carried out under high temperature and high pressure conditions. If it is used for sludge treatment, the energy consumption is high and the economic benefits are not significant

However, the research on the preparation of solid fuel by hydrothermal carbonization of biomass is still in the initial stage in my country, and the reaction parameters used in the hydrothermal carbonization are different for different types of organic solid wastes with high moisture content in the existing research. At the same time, the liquid product produced after hydrothermal carbonization treatment still needs to be treated twice, which will not only increase the treatment cost, but also increase the risk of secondary pollution

In addition, there are very few studies on the hydrothermal carbonization of sludge combined with biomass waste, and no method has been found that can effectively use sludge combined with biomass waste to produce solid clean fuels.

Images