Method for producing bio-coal

Abstract

The invention discloses a preparation method of biomass coal, which equably mixes the mud of sewage treatment factory, paper mill and alcohol plant and biomass powder, such as active carbon, charcoal or coal in proportion with 10:0.5 to 2:0.5 to 2 and ferments for 3 to 5 days in heap mode. The preparation method of biomass coal can be eventually obtained after molding and insolation or drying, the heat of which can reach 4000 kilocalorie. The preparation method of biomass coal can be easy to learn the control technique, can not only resolve the mud treatment of sewage treatment plants but also make full use of waste biomass. The biomass coal provides flammable renewable sources and also has the advantages of simple production technique, good environmental protection performance, good energy-saving performance, high social benefit, low cost and high economic benefit.

Description

technical field

[0001] The invention relates to treatment of sludge or production of fuel coal, in particular to a method for producing biomass coal by utilizing sludge and biomass produced in a sewage treatment plant. Background technique

[0002] At present, sewage treatment plants are generally established in various large, medium and small cities in my country, and sewage treatment plants will produce a large amount of sludge every day (sludge refers to solid, semi-solid and liquid waste produced by sewage treatment; contains a large amount of organic matter, Heavy metals and pathogenic bacteria, etc.), sludge treatment is a headache for every city. At present, sludge treatment mainly adopts landfill, fertilization and incineration methods. Due to the high moisture content of sludge (65%-80%) and toxic heavy metals, landfill treatment not only occupies a large amount of land, but also seriously pollutes groundwater resources; as a fertilizer, it will also cause secondary...