Method for preparing biological coal

Abstract

The invention provides a method for preparing biological coal, and belongs to the technical field of biomass carbonization. In the method, the biological coal is prepared by processing a biomass molding fuel, such as drying, carbonizing, cooling and the like in turn through carbonization conversion technology; a process system adopted in the carbonization conversion technology is approximately a sealing system, superheated vapor or N2 or other inert gases are taken as a medium, and part of vapor is from moisture in a wet raw material; in the process, vapor and heat produced in the drying process are provided for a heater for carbonization, so that heat energy is recycled in the process, and only a small amount of heat energy needs to be supplemented; a small amount of pyrolysis gas produced in the carbonization process is recycled as a fuel, so that a heat source is provided for the drying and carbonization processes; and heat released in the cooling process is recycled, so that the heat energy is provided for the drying and carbonization processes. The biological coal prepared by the method solves the problems of storage, transportation, fire prevention and the like in the biomass utilization process, and can be used for direct combustion power generation.

Description

technical field [0001] The invention belongs to the technical field of biomass carbonization, and in particular relates to a preparation method of biological coal. Background technique [0002] With the increasing demand for fossil fuels in the development of the national economy, the consumption of fossil fuel resources is accelerating at an alarming rate, and their prices are constantly rising. And the use of coal will produce serious environmental pollution. Facing the intensified contradiction between the supply and demand of fossil fuel resources, environmental pollution and the pressure of national energy conservation and emission reduction, the development of new energy and renewable energy has become an inevitable trend. Biomass, as a renewable resource, produces almost no pollution during use, and at the same time plays an important role in protecting and improving the ecological environment. It is one of the ideal renewable energy sources and has unlimited potenti...

AI Technical Summary

Problems solved by technology

However, because biomass has the characteristics of large volume, light weight, easy fire, wide distribution area, and seasonal harvest, it has caused great difficulties for biomass collection, transportation, storage, and fire prevention, which has affected the large-scale production of biomass. use

At present, the biomass molding fuel manufactured by the biomass molding compression technology commonly used at home and abroad has solved technical problems such as biomass collection, transportation, storage, and fire prevention, but the biomass molding particles are not waterproof and easy to loose when stored for a long time. The stability is not good, and large-scale modification of the furnace structure is required when it is directly applied to power generation on a large scale

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