Biomass pellet fuel and preparation method thereof

Abstract

The invention discloses a biomass pellet fuel prepared by the following raw materials by weight: 68-75 parts of wheat straw, 40-49 parts of corn straw, 30-42 parts of sawdust, 20-35 parts of fine sand, 13-20 parts of combustion improver, 2-6 parts of coal slurry and 5-9 parts of additive. According to the biomass pellet fuel and the preparation method, the problem that the combustion improver andthe additive are filtered off with impurities due to traditional pulverization, mixing and sieving together is solved by adding the combustion improver and the additive to the raw materials subjectedto the pulverization, the mixing and the sieving. By changing the traditional raw material addition sequence, the quality of molded pellets is improved, the certain internal water content is ensured during drying, the effect on compression molding caused by too high or too low moisture can be avoided, the preparation equipment is protected, circular mould hole blocking caused by excessive moistureis avoided, the fact that the particles are difficult to mold and a large amount of powder is discharged when the moisture is too low is avoided, the molding rate and the output are improved, and better use prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of biomass particle fuel, in particular to a biomass particle fuel and a preparation method. Background technique [0002] Biomass resources are the fourth clean energy in terms of reserves and have broad development prospects. Because of their unique renewability, low pollution and wide distribution, they have attracted widespread attention. The existing biomass pellet fuels cannot meet people's needs. use; [0003] There are certain drawbacks in the processing of existing biomass pellet fuels. First, all the traditional raw materials are pulverized, mixed and sieved together, which will easily cause the combustion aids and additives to be filtered out together with impurities, and the combustion aids and additives cannot be fully utilized. , the quality of the particles after molding is poor. Secondly, the moisture content inside the raw materials cannot be maintained at a certain value during drying, and...

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Problems solved by technology

[0002] Biomass resources are the fourth clean energy in terms of reserves and have broad development prospects. Because of their unique renewability, low pollution and wide distribution, they have attracted widespread attention. The existing biomass pellet fuels cannot meet people's needs. use;

[0003] There are certain drawbacks in the processing of existing biomass pellet fuels. First, all the traditional raw materials are pulverized, mixed and sieved together, which will easily cause the combustion aids and additives to be filtered out together with impurities, and the combustion aids and additives cannot be fully utilized. , the quality of the particles after molding is poor. Secondly, the moisture content inside the raw materials cannot be maintained at a certain value during drying, and it is easy to affect the compression molding due to too high or too low moisture. When the moisture is too low, there will be a lack of proper moisture lubrication between the particles The effect is that the particles are difficult to form, more powder is produced, and the output is reduced. When the moisture is too high, the material and the pressure roller will slip, causing the forming pressure to drop, the material cannot be removed, the hole of the ring die is blocked, and the output is reduced. Therefore, we propose a A kind of biomass pellet fuel and its preparation method

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