Sludge synthetic fuel and manufacturing method thereof

Abstract

The invention provides sludge synthetic fuel and a manufacturing method thereof. Sludge generated when a sewage treatment plant treats industrial wastewater and urban domestic wastewater is used as a raw material, and the mass ratio of sludge to pulverized coal is 2:1-19:1. The sludge and the pulverized coal are uniformly mixed in a stirrer and other stirring devices according to the weight percentage, then the mixture is conveyed through a conveyer belt and other conveying devices to a pelletizer or a press machine for fuel forming, and the formed fuel is dried in the shade place for 3-5 days and then can be combusted. The sludge synthetic fuel is simple in formula and good in combustion working condition and environmental protection performance, saves coal resources, turns waste into wealth and greatly reduces sludge treatment cost.

Description

technical field [0001] The invention relates to a sludge synthetic fuel and a manufacturing method thereof, in particular to a fuel with sludge as a main raw material and a manufacturing method thereof. Background technique [0002] According to statistics, at present, the annual output of sewage treatment plant sludge in my country reaches tens of millions of tons. Due to the constraints of treatment costs and other factors, the main treatment methods are centralized stacking and landfill, which occupy a large amount of land and cause environmental pollution. [0003] Along with the development of urbanization, the resource utilization of sludge has been paid more and more attention by people. Chinese patent document CN101191089A discloses a kind of sludge-coal mixed fuel and its use method, wherein the ratio of sludge and coal is: sludge account for 50-65% of the mixed fuel composition, and coal accounts for 35-50% of the mixed fuel composition. 20-30% of the volume. [...

AI Technical Summary

Problems solved by technology

[0004] In the above technology, the mass fraction of sludge in the mixed fuel is not more than 65%, and a large amount of coal resources still need to be consumed; and in the fuel actually put into the furnace, the mixed fuel accounts for 20-30% of the total fuel , the proportion of sludge in the total fuel is less than 20%, which further increases the consumption of coal resources; The mass fraction is not more than 65%, which is not enough to make the fuel bonded and formed without adding other binders

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