Vibrating screening machine for biomass

Vibrating screening machine for biomass is a core equipment for material classification and impurity separation in the field of biomass processing. Its main function is to screen solid materials through mechanical vibration. This equipment is mainly used for the pretreatment of biomass raw materials and the quality improvement of finished products. It is suitable for the processing of various biomass materials such as wood chips, straw, and fruit shells. The commonly used mesh range is between 12 mesh and 180 mesh, which can cover the diversified classification needs from coarse particles to fine powder.

Working principle and structural characteristics of vibrating screening machine for biomass

The equipment uses an upright vibrating motor as the power source, and the upper and lower shaft ends of the motor are equipped with adjustable phase eccentric weights. When the motor is running, the centrifugal force generated by the eccentric block converts the rotational motion into horizontal, vertical, and inclined three-dimensional composite vibration through a specific angle combination. This vibration mode makes the material present a spiral involute motion trajectory on the screen surface. Compared with the traditional linear vibrating screen, the effective area of the material contacting the screen is increased by more than 40%, and the screening efficiency is significantly improved.

The screen frame adopts modular design and supports 1-5 layers of screen configuration. Each layer of screen is fixed by a quick release device, and a single screen change operation can be completed within 5 minutes. The screen material is 304 stainless steel woven mesh, which can be upgraded to 316L stainless steel or nylon material under special working conditions. The aperture range covers 8 mesh (2.36mm) to 500 mesh (0.025mm), meeting the classification requirements from coarse crushed particles to fine powders. The vibration intensity can be adjusted by the angle of the eccentric blocks at both ends of the motor, and can be adjusted steplessly within the range of 15°-45° to adapt to the screening characteristics of different materials.

Screening mesh and classification of vibrating screening machine for biomass

The screening accuracy of vibrating screening machine for biomass is determined by the mesh number of the screen and the vibration parameters. The standard configuration of the equipment supports 8-500 mesh screen combinations, corresponding to the classification range of apertures from 0.28mm to 20mm. In practical applications, a 6-level grading system can be formed by stacking multiple layers of screens:

Coarse screen section (8-30 mesh): Processing particles with a particle size of 2.36mm-0.6mm, used to remove large-sized impurities

Medium screen section (35-100 mesh): Separating 0.5mm-0.15mm materials, commonly used in biomass fuel particle grading

Fine screen section (120-500 mesh): Processing 0.125mm-0.025mm fine powder, suitable for biomass carbon powder purification

Application of Vibrating screening machine for biomass

Biomass fuel pretreatment

In the biomass pellet fuel production line, Vibrating screening machine for biomass is used for raw material impurity removal and particle size grading. The 8-20 mesh screen is used to remove impurities such as sand, stone, and metal, and the 40-60 mesh screen is used to control the raw material particle size distribution to ensure the stable operation of the subsequent crushing and drying processes.

Biomass carbonization process

In response to the production needs of activated carbon, Vibrating screening machine for biomass can achieve the grading of carbonized materials. The 200-mesh screen is used to separate the micro powder, and the 325-mesh fine screen is used for purification. The particle size distribution of the obtained carbon powder is concentrated, and the specific surface area compliance rate is increased to 98%.

Biomass fermentation pretreatment

In biogas projects, Vibrating screening machine for biomass is used for the pretreatment of livestock and poultry manure and straw mixtures. The 10-mesh screen is used to remove long fiber impurities, and the 40-mesh screen is used to control the feed particle size, so that the concentration fluctuation range of the fermentation liquid is reduced to ±2%, and the methane production is increased by 12%-18%.

Biomass substrate purification

For high-end applications such as biomass-based plastics and fiberboards, Vibrating screening machine for biomass can achieve 500-mesh fine powder screening. Biodegradable material companies use this equipment, and the CV value of the raw material particle size can be reduced from 45% to 18%, and the tensile strength of the product can be increased by 23%.

During the operation of Vibrating screening machine for biomass, parameters such as screen configuration, vibration frequency and amplitude can be flexibly adjusted according to the material characteristics to meet different screening needs. In daily use, it is necessary to regularly check the damage and blockage of the screen, and clean or replace the screen in time to ensure the screening effect. At the same time, the cleaning and maintenance of the equipment is also a key link to ensure stable operation. The outside and inside of the vibrating screen, especially the screen and exciter, need to be cleaned regularly to prevent dust and debris from accumulating.