Crop straw blending coal

Abstract

The invention discloses a crop straw composite coal, which is composed of 10-40% straw and 60-90% coal, wherein the calorific value of hay is 4300kilocalorie / kg (18003kj / kg); the calorific value of dried leaf and dried branch is 3900kilocalorie / kg (16328kj / kg), which is higher than soy straw and cotton straw.

Description

technical field [0001] The invention relates to a coal, in particular to a crop straw mixed coal. Background technique [0002] In my country's energy structure, coal resources are the most abundant. In the composition of fossil fuels, coal resources account for 95.4%, petroleum accounts for 3.3%, and natural gas accounts for 1.3%. About 2 / 3 of my country's annual raw coal production is used for combustion, of which 1 / 3 is used for industrial boilers and 1 / 3 for power plant boilers. Industrial boilers need to use high-quality coal with high volatile content. When coal is separated, the combustion conditions are poor, and the boiler output and boiler thermal efficiency are both low, which hinders the effective use of coal and causes waste. At present, farmers continue to burn stalks, which wastes biological resources, pollutes the atmosphere, and even brings fire hazards. The thick smoke produced by burning crop stalks in large areas even affects the take-off and landing of a...

AI Technical Summary

Problems solved by technology

Traditional desulfurization equipment focuses on the passive removal of sulfur dioxide in the flue gas. Because these desulfurization equipment increases operating costs after being put into operation, the operation is troublesome, and the harmless treatment of secondary products after desulfurization is complicated and difficult to recycle, often causing secondary pollution.

For example: develop wet flue gas desulfurization equipment on the basis of stone water film (or spray) dust collector, if the desulfurization rate of pure water washing method is about 18%, the washing water is recycled, and the water gradually becomes acidic, which is harmful to the circulation pump pipeline, etc. The equipment is severely corroded, and part of the acidic wastewater will be discharged after repeated recycling, causing secondary pollution

Adding alkaline chemical products can improve the desulfurization efficiency, but the secondary products (sulfate, etc.) after desulfurization in the water will still be discharged into urban and rural waters, further polluting the environment

Therefore, even though many unit boilers have desulfurization equipment, they are not put into operation at ordinary times. They only purchase the right to use desulfurizers when the environmental protection monitoring department comes to check. In this way, the real goal of protecting the environment is difficult to implement