Method for preparing high-performance compound machine-made charcoal

Abstract

The invention relates to a method for preparing high-performance compound machine-made charcoal, and belongs to the technical field of resource comprehensive utilization. The method comprises the following steps: respectively grinding a biomass raw material with a moisture content of lower than 5 percent and lignite into particles having granularity of less than 1cm; pyrolyzing the biomass raw material particles to obtain charcoal; uniformly mixing charcoal, lignite, an adhesive, a combustion improver and water to obtain a mixed material, and pressing the mixed material into charcoal rods with center holes; and heating the charcoal rods with center holes to 400-700 DEG C at a heating speed of 30-200 DEG C/min, carbonizing for 1-12 hours, and cooling to obtain the compound machine-made charcoal. The preparation process adopts biomass which is rich in source and low in price, is regenerative and can be easily ground and lignite with low price as carbon sources, has the potentials of low large-scale production price, high yield, high heat value and high porosity, and is well accepted by the market.

Description

technical field [0001] The invention relates to a preparation method of high-performance composite machine-made carbon, which belongs to the technical field of resource comprehensive utilization. Background technique [0002] For a long time, charcoal has been widely used as living fuel. Charcoal is produced by burning or pyrolyzing wood under anoxic conditions. The production of charcoal requires a large amount of forest resources, which seriously damages the ecological environment. my country's forest coverage The area is less than 10% of the country's land. The formation of forests requires a certain growth cycle. A large number of deforestation does not meet the requirements of protecting the ecological environment, creating a low-carbon society, and developing a circular economy; the traditional production method of charcoal is to put wood into kilns The earth kiln charcoal making process of medium pyrolysis has the disadvantages of poor sealing, long production cycle, lo...

AI Technical Summary

Problems solved by technology

However, agricultural and forestry biomass resources also have their limitations. The main manifestations are: the distribution is not concentrated, and it is not easy to collect. my country's lignite resources are abundant and the price is low, but lignite has high volatile components (>40%), low fixed carbon content, and undeveloped pore structure, and the combustion effect of mechanism charcoal prepared by using lignite alone is not ideal. For the application of lignite, using lignite as raw material, medium and low temperature dry distillation is used to carbonize lignite, remove most of the water and volatile matter, and obtain lignite semi-coke with better performance, and mix it with biomass charcoal, which can expand its Application range

[0004] Based on the above background, this paper proposes a composite mechanism carbon preparation method that not only overcomes the low yield of biomass charcoal, but also solves the problems of low fixed carbon content of lignite and undeveloped pore structure.