The core function of the biomass pellet machine is to convert the scattered and low-quality agricultural and forestry waste (water content 15%-20%, particle size 2-5mm after crushing) into high-density (1.1-1.3g/cm³) and high calorific value (4000-4500kcal/kg) biomass pellet fuel through high-pressure extrusion. The whole process realizes the dual value of "pollution cutting" and "resource activation":

1. Cut off the "incineration pollution chain": from "air pollution discharge" to "clean combustion"

The biomass pellet machine solidifies agricultural and forestry waste that may have been incinerated into pellet fuel, and its combustion characteristics are far better than the original waste:

Pollutant emissions drop sharply: When the original straw is burned, the smoke emission concentration can reach 500-800mg/m³, while the biomass pellets are burned in a special boiler, the smoke concentration can be controlled below 30mg/m³, and nitrogen oxide emissions are reduced 60% (because the pellets burn fully, avoiding local high temperature to generate NOx), almost no VOCs and polycyclic aromatic hydrocarbons are released.

Replacing fossil fuels to reduce carbon: The carbon cycle of biomass pellet combustion belongs to "short-cycle carbon neutrality" (plant growth absorbs CO₂, and combustion releases the same amount of CO₂). Compared with coal combustion (2.6 tons of CO₂ per ton of standard coal), burning 1 ton of biomass pellets can reduce about 1.8 tons of CO₂ emissions, indirectly reducing the "hidden carbon pollution" brought by fossil energy.

2. End the "stacking pollution chain": from "field garbage" to "standardized raw materials"

The pretreatment system (crushing, drying, and impurity removal) of the biomass pellet machine can efficiently process various types of agricultural and forestry wastes and eliminate the hidden dangers of stacking:

Eliminate leachate pollution: The moisture content of the raw materials is reduced from more than 60% to 15%-20% through the drying process to avoid water loss during stacking; the crushed materials are transported to the pelleting plant in a closed manner, without open-air stacking throughout the process, cutting off the infiltration path of leachate to the soil and water bodies.

Reducing the spread of pests and diseases: During the pelleting process, the raw materials will generate a high temperature of 60-80℃ due to friction during extrusion molding, which can kill more than 90% of insect eggs and pathogens (such as corn borer eggs in straw and mold spores in sawdust), avoiding the breeding of pests and diseases caused by returning waste to the field.

3. Build a "circular economy chain": turn "waste" into "ecological assets"

The biomass pellet machine not only solves pollution, but also forms a virtuous cycle of "environmental protection-economy" through resource transformation:

Improvement of rural environment: In the main straw production areas, biomass pellet factories can recycle straw on site (the purchase price is 200-300 yuan per ton), and farmers have turned from "burning to save trouble" to "selling materials to make money", and the field burning phenomenon has been reduced by more than 80%, and the rural air quality has been significantly improved.

Soil fertility protection: The residue after pelleting (such as the fine powder screened out) can be used as organic fertilizer raw materials, and returned to the field after composting, which not only avoids the disadvantages of directly returning waste to the field, but also realizes nutrient circulation (the residue of 1 ton of straw pellets can replace 50kg of chemical fertilizers).

Energy structure optimization: Biomass pellets can be used as fuel for industrial boilers and household heating, and can replace loose coal in northern rural areas (loose coal burning is an important source of winter haze). A single 2-ton biomass boiler can replace 1,200 tons of loose coal each year, reducing smoke emissions by about 30 tons.

The "invisible pollution" of agricultural and forestry waste stems from the contradiction between "misplaced resources" and "inefficient treatment methods". The biomass pellet machine uses "reduction, harmlessness, and resource utilization" to treat it, which not only cuts off the air, water, and soil pollution chain caused by incineration and stacking, but also converts waste into clean energy and economic resources, truly realizing "turning waste into treasure". Under the "dual carbon" goal and rural revitalization strategy, the biomass pellet machine has become the "standard equipment" to solve the pollution of agricultural and forestry waste, allowing green development to go from "slogan" to "visible ecological improvement".