Production process for straw coal

Abstract

The invention relates to a production process for straw coal. The adopted technical scheme comprises the following steps of: crushing straw; adding the crushed straw into a charring furnace, and charring at the temperature of 800 and 1,200 DEG C for 30 to 50 minutes under the anaerobic state; cooling to the temperature of 200 and 250 DEG C, adding 20 to 30 weight parts of loess, 20 to 30 weight parts of coal slime, 0.1 to 0.7 weight part of sulphur-fixing agent and 0.1 to 0.7 weight part of paraffins into 100 weight parts of charred straw, and mixing the mixture uniformly; and conveying to an extruder, forming and drying. The straw coal produced by the invention is newly developed energy, and the straw of crops is utilized fully, so that waste materials are turned into wealth, the rural environment is improved, and the produced straw coal has high quality and heat value of up to about 5,000 kilocalories, and is safe, pollution-free, energy-saving and environmentally-friendly.

Description

technical field [0001] The invention belongs to the field of biomass renewable energy production, and in particular relates to a process for producing straw coal from waste straw of crops. Background technique [0002] According to the forecast of the International Renewable Energy Organization: the reserves of underground oil, natural gas and coal can only be used for about 60 years according to the current exploitation utilization rate. With the shortage of energy in the world, the market demand and profit margin of biomass renewable energy will be immeasurable. On the one hand, the output of various straws in the vast rural areas and towns is large and the range is wide. According to statistics, in 2006, China's crop straw output reached 570 million tons, mainly including corn, wheat, cotton, rice, barley and oil crops. Most of these straws are discarded as waste products or directly burned, which not only causes waste of resources, but also damages the soil environment...

AI Technical Summary

Problems solved by technology

Most of these straws are discarded as waste products or directly burned, which not only causes waste of resources, but also causes damage to the soil environment and pollution to the atmospheric environment.

On the other hand, the coal-fired boilers used in heating, heating, hotels, restaurants, bathing and other industries in cities do not meet environmental protection requirements, and only crude oil boilers can be used, and the high cost of fuel oil has caused heavy operating pressure for enterprises.