Method for preparing biomass molding fuel by pressing pig manure

Abstract

The invention discloses a method for preparing biomass molding fuel by pressing pig manure. 70-80 parts of pig manure slag, 10-15 parts of pulverized coal, 1-3 parts of sodium carboxymethyl starch, 2-3 parts of potassium chlorate, 2-3 parts of a decoking agent, 0.5-1 part of an antismoke agent, 3-6 parts of industrial salt and 1 part of pig manure fermented biological strain are added to the collected pig manure slag by weight ratio; the mixture is stirred well; the mixture is extruded through a screw extruder and cut, and a molded body is obtained; and then fermentation is performed, and a biomass fuel block is obtained. Sources of raw materials for pig manure are wide, application range is wide, and drying is not required; the molding is good, and density is large; the pig manure can bemolded without high temperature; the biomass molding fuel is environmentally friendly and anti-mildew; and the pig manure can be dried at low cost and without energy consumption.

Description

Technical field [0001] The invention belongs to the treatment and utilization of waste, and relates to the preparation of shaped biomass fuel with pig manure residue as the main raw material. Background technique [0002] Statistics show that the total annual production of livestock and poultry manure in China has reached nearly 4 billion tons, and the chemical oxygen demand of livestock and poultry farms has reached 12.68 million tons, accounting for 96% of agricultural emissions. It is an important source of agricultural pollution. the reason. There are three common models of livestock manure treatment: biogas industry, organic fertilizer industry and combination of planting and breeding. During the promotion of anaerobic fermentation biogas power generation technology, there are high equipment costs, inadequate technical management, slow biogas production process, secondary pollution of biogas liquor, poor gas production efficiency in some biogas digesters, and large seasonal...

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Problems solved by technology

[0004] In recent years, domestic and foreign patents have also been reported on the technology of preparing fuel from pig manure. However, in the prior art, the hot pressing and product drying in the production process require expensive equipment investment and more energy consumption, which increases the Production cost; secondly, the existing preparation method has extremely high requirements on the moisture content of pig manure, and the moisture content is required to be controlled within a very narrow range. If the moisture content is too low or too high, it will lead to unsuccessful molding or granulation of solid fuel. However, in It is difficult to control the moisture content of pig manure during the production process

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