I. What is a biomass pellet mill?
(1) Definition and principle
Biomass pellet mill is a kind of biomass energy pretreatment equipment. It mainly converts biomass raw materials into high-density pellets by extruding and molding through the movement of press wheels and molds.
(2) Main raw material range
Biomass pellet mill can use a wide range of raw materials, mainly based on agricultural and forestry processing waste, wood chips, straw, rice husk, bark and so on are common raw materials. Specifically, in agriculture, food crop residues such as wheat straw, cotton stalks, rice straw, corn stalks, corn cobs and some other cereal stalks can be used as raw materials; forestry, wood industry, furniture production left behind the scraps, such as shavings, sawdust, wood shavings, edges, etc., can also be used for biomass pellet mill. In addition, part of the industrial waste and the organic matter contained in the city’s living garbage (provided that it meets the corresponding requirements and specifications) can also be used as raw materials, these materials may be waste through the biomass pellet mill processing, without adding any binder, can be made into particles of fuel, to achieve the reuse of resources, has a high environmental value and economic value.
Second, the classification of biomass pellet mill
(1) Flat mold biomass pellet mill
Flat die biomass pellet mill has its own characteristics in terms of structure, its overall structure is relatively simple, mainly by the body, pressure wheel, flat die and other key components. This simple structure makes its cost cheaper, which is very attractive for some small-scale production factories or individual users with limited budget. Moreover, the follow-up maintenance is also relatively simple, without the need for too complex technology and high maintenance costs.
In terms of applicable scenarios, flat die biomass pellet mill is widely used, especially suitable for pressing feed pellets. For example, some small farms, need to process their own feed pellets to feed livestock and poultry, flat die biomass pellet mill can well meet the demand for a variety of suitable raw materials processed into quality qualified feed particles, help the development of the farming industry. At the same time, some individual farmers who want to process their own feed, choose it is also very economical.
(2) Horizontal ring mold biomass pellet mill
Ring die biomass pellet mill has unique operating characteristics, its speed is relatively stable, which guarantees the orderliness of the production process. It has excellent performance in terms of output, and can produce more pellets per unit time to meet the needs of larger-scale production. And it can produce greater pressure, for the material extrusion molding effect is remarkable.
(3) Vertical ring die pellet mill
Vertical ring die pellet mill this kind of special biomass pellet mill has a unique structural design, it adopts the vertical feeding way, the material can follow the set channel orderly into the processing area. And its mold is static, while the pressure wheel rotates, so that the material in the pressing process is more uniform and full force.
It has many advantages, high pressure, can make the material more compact, more efficient molding, molding rate is very high, greatly reducing the waste of raw materials. It is by virtue of these advantages, it is particularly suitable for large production lines, in some large biomass energy processing plants or large-scale feed production enterprises, can be a long time stable operation, to ensure the smooth completion of large-scale production tasks, and effectively improve the overall production efficiency and product quality.
