Straw and coal blended fuel and production process thereof

Abstract

The invention discloses a straw and coal blended fuel. The straw and coal blended fuel is prepared from the following components in parts by weight: 5 to 30 parts of coal powder, 60 to 90 parts of straw, and 5 to 10 parts of sludge or loess, wherein the coal powder is excellent-quality anthracite or coke of which a calorific value is more than 7000 calories; the straw comprises 1 / 3 woody straw and 2 / 3 herbal straw, the woody straw comprises one or more of wood sawdust, sawdust, branches of trees or roots of the trees, of which the calorific value is more than 6000 calories, and the herbal straw is crop or non-crop straw of which the calorific value is more than 3000 calories. By using the blended fuel, the calorific value of the straw fuel can be increased and the coking phenomenon can be effectively prevented; meanwhile, sources of raw materials are wide, the reduction of the production cost is facilitated, and an environment is protected.

Description

technical field [0001] The invention belongs to biomass mixed fuel, and in particular relates to a biomass fuel which is mixed with plant straw and coal in proportion and pressed into shape and a production process thereof. Background technique [0002] With the rapid development of society and the improvement of economic living standards, after the convenient and fast fossil energy enters the countryside, the traditional crop straw fuel is gradually no longer used in the vast rural areas. In order to facilitate farming, farmers have to use the method of setting fire to dispose of it, which not only causes waste of resources, but also seriously pollutes the atmosphere, becoming an important factor in the smog in the air. [0003] Therefore, in order to solve the problem of air pollution, the government has gradually shut down coal-fired boilers below 10 tons in most places, and encouraged the burning of electricity, gas, and biomass fuels. The high cost of electricity and g...

AI Technical Summary

Problems solved by technology

The high cost of electricity and gas makes it impossible for many enterprises to afford it. Therefore, in order to meet the emission standards, even for large boilers of more than 10 tons, the use of biomass fuel has become the preferred choice of many enterprises.

[0004] However, the calorific value of biomass fuel is much lower than that of fossil fuels, such as 3400 kcal of rice straw, 3000 kcal of corn straw, and 3800 kcal of wheat straw, which often cannot meet the needs of actual production; and because large boilers cannot boost pressure, When fossil fuels are used, when the content of alkali metals (silicon dioxide, magnesium oxide) is high, the fuel will form coke at a high temperature of 800°C--1000°C, which will hinder the normal operation of the boiler