Biomass briquetting machine is a kind of equipment for compressing and molding biomass raw materials such as crop straw, sawdust and rice husk, which is widely used in the field of new energy. In order to ensure the normal operation of briquetting machine and the final product quality, the pretreatment of raw materials is a crucial link. So, what steps does the raw material pretreatment of biomass briquetting machine include? The following is the main content.

1. Classification and screening of raw materials

Different kinds of biomass raw materials have different physical and chemical characteristics, so it is necessary to classify the raw materials before use. For example, raw materials such as sawdust, rice husk and straw should be treated separately in order to achieve better molding effect in the subsequent processing. In addition, raw materials need to be screened to remove impurities, such as stones, metals, plastics, etc., so as not to damage equipment or affect product quality.

2. Crushing treatment

Biomass raw materials usually need to be crushed before entering the briquetting machine. The purpose of crushing is to crush raw materials into particle sizes suitable for briquetting. Generally speaking, it is best to control the particle size of raw materials below 5 mm, which can improve the compression efficiency and molding effect. The crushing process is usually completed by using a crusher or crushing equipment.

3. Drying treatment

The moisture content of biomass raw materials has an important influence on briquetting. Too high moisture will cause the briquette not to be shaped or loose, while too low moisture may affect the operation of the equipment. Generally speaking, the moisture content of biomass raw materials should be controlled between 10% and 15%. In practice, the moisture content of raw materials can be reduced by natural drying or using professional drying equipment.

4. Mix evenly

If a variety of biomass raw materials need to be mixed, they must be mixed evenly. Through uniform mixing, the characteristics of different raw materials can be brought into full play, thus improving the quality and stability of briquette products. The mixing process usually needs the help of stirring equipment.

5. Preheating treatment (optional)

In some cases, in order to improve the plasticity and cohesiveness of biomass raw materials, it can be preheated. Preheating can soften the fiber structure and make the raw materials easier to compress and form. However, this step is not necessary in all scenarios, and can be determined according to the characteristics of raw materials and equipment requirements.

The pretreatment of raw materials of biomass briquetting machine is an indispensable part of the whole production process, including classification and screening, crushing, drying, mixing and possible preheating. These steps can not only improve the operation efficiency of the equipment, but also ensure the quality and performance of the final product. In practice, the pretreatment scheme should be flexibly adjusted according to different raw materials and production requirements to achieve the best effect.