Process method and process system for preparing solid fuel through biomass and sludge

Abstract

The invention discloses a process method and a process system for preparing solid fuel through biomass and sludge. The method comprises the step of mixing biomass dried raw materials with sludge dried raw materials which are aired, ground and dried to obtain the solid fuel, wherein sludge airing energy is one or the combination of any two or three of solar energy, waste gas generated by drying sludge raw materials and high-temperature fume generated by combusting the solid fuel, and sludge raw material drying energy is high-temperature and high-pressure steam generated by combusting the solid fuel. The system comprises a raw material treatment system, a molding system and a boiler system, wherein the raw material treatment system and the boiler system transfer heat energy to each other through first, second and third gas delivery pipelines. According to the method, the cost is low, the effect is good, environmental protection is realized and the solid fuel is suitable for large-scale production. The system is resource-saving and stable to operate.

Description

technical field [0001] The invention belongs to the field of solid waste recycling, and in particular relates to a fuel treatment process and system using biomass and sludge as raw materials. Background technique [0002] Since the beginning of the 21st century, energy and environmental issues have always been the central issues that all countries in the world are facing and are related to the sustainable development of the national economy. In order to alleviate and gradually solve this problem, countries all over the world are actively developing renewable new energy. [0003] With the rapid development of the global economy and people's increasing concern for the environment, the amount of sewage treatment has increased rapidly, and the corresponding sludge production has also increased rapidly. Sludge refers to the solid, semi-solid and liquid waste produced by sewage treatment. It is an extremely complex heterogeneous body composed of organic debris, bacterial cells, c...

AI Technical Summary

Problems solved by technology

The system and method firstly prepare the semi-finished sludge briquette by kneader, and then dry it. In this way, it is difficult to dry the inside of the semi-finished sludge briquette, and the drying energy consumption is high. During the drying process, cracking and strength are prone to occur. There are also some patents that use sludge and biomass to be mixed first, then dehydrated and dried to a lower moisture content, and then the mixture is molded to obtain solid fuel, such as "A Production Method for Solid Fuel" (Application No. : 201010119602.0) in the patent, the municipal sludge with a water content of more than 80% is mixed with biomass powder, dehydrated to a water content of less than 20%, and then molded under low pressure to obtain a solid fuel. The sludge and biomass are first mixed and then dried, which is not conducive to The full mixing of the two will result in uneven properties of the produced fuel, which will cause great damage to the boiler, and the molding is carried out under low pressure, so the strength of the solid fuel is not enough

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