With the increasing depletion of fossil fuels, the global focus has shifted toward the development and utilization of alternative and renewable energy sources. This is especially crucial for countries like China, where per capita energy resources are limited and distributed unevenly. Among various renewable energy options, biomass has emerged as a promising solution. In China, agricultural and forestry waste—such as crop straws, oil crops, wood processing residues, and animal waste—represent a significant energy potential. According to statistics, the annual straw output in China is approximately 700 million tons, with around 376 million tons being used for energy purposes.
Due to its low density, high volume, and poor storage and transportation characteristics, raw straw is not ideal for direct use as fuel. To address this, straw briquetting machines have been developed to compress loose straw into dense, uniform fuel blocks. These briquettes offer improved calorific value, easier handling, and better combustion performance. They can be used in boilers, gasifiers, and even for heating greenhouses, making them a versatile and valuable energy source.
Currently, there are three main types of straw briquetting machines: screw extrusion, piston stamping, and ring die molding. This paper primarily focuses on the ring die type. The machine consists of a motor, feeding system, hopper, pulley, belt, protective cover, ring die compression chamber, and base. The operation involves feeding the material into the compression chamber, where it is compressed by the interaction between the ring die and pressure rollers. This process results in a high-quality fuel with consistent shape and properties.
The transmission system typically uses a belt drive, which offers overload protection and shock absorption. However, traditional designs often feature separate mechanisms for feeding and pressing, leading to complex structures and higher energy consumption. A more efficient design uses a single-shaft system, simplifying the mechanism and improving overall efficiency.
The compression chamber employs a dual-pressure roller system, ensuring even material distribution and enhanced productivity. The gap between the ring die and pressure rollers significantly affects performance. Too small a gap can cause excessive wear, while too large a gap reduces output. Proper adjustment of this gap is essential for optimal operation.
The ring die is a critical component, and its design greatly influences the machine's performance. Two common types are the integral forged ring die and the modular ring die. While the former is durable, it is difficult to machine and leads to higher maintenance costs. The modular design allows for easier replacement of worn parts, reducing downtime and maintenance expenses.
In conclusion, the ring die straw briquetting machine offers an efficient and practical solution for converting agricultural waste into usable fuel. Its simplified structure, improved productivity, and cost-effective maintenance make it a valuable asset in the renewable energy sector. With continued research and optimization, such machines can play a key role in meeting global energy demands sustainably.
Sanmenxia Futong New Energy specializes in biomass fuel production equipment, including pellet machines, straw briquetting machines, and feed pellet machines. We also offer a wide range of biomass pellets for sale.
Source: Structural Analysis of Ring-Type Straw Briquetting Machine
http://news.chinawj.com.cn
Image: Structural Analysis of Ring Model Straw Briquetting Machine
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