FAQ

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FAQ about Briquetting Machine

KINGMAN Knowledge
This section is dedicated to sharing insights and expertise by KINGMAN (KMEC) in biomass equipment and production with clients both domestically and internationally. KINGMAN (KMEC) is committed to providing solutions that help clients optimize production and maximize profits.

Question 1: Why do briquettes often bend during the briquetting process?
Answer: The formation of bent briquettes can be attributed to several factors, including the compression ratio, the tolerance clearance between the sleeve and the mold (die or screw rod), and most significantly, the moisture content of the feedstock. If the moisture content exceeds the optimal level, it results in distorted shapes, along with the possibility of fissures and cracks developing in the briquettes. To avoid this, it is essential to monitor and regulate the moisture content of the feedstock before it is introduced into the briquetting machine. If you require a humidity gauge, KINGMAN can provide a small device for moisture detection—please feel free to reach out to us.

Question 2: What causes difficulty in forming briquettes?
Answer: There are two primary reasons for this issue. First, once the material size and moisture content are confirmed, it's crucial to ensure that the heater of the briquetting machine is turned on for adequate preheating of the forming area. High temperatures are necessary as they soften the feedstock, aiding the compaction and binding process. Second, tolerance clearance is vital in determining the ease of briquette formation. Different materials necessitate distinct clearance levels; hence, it's important to ensure accurate and consistent clearance is maintained throughout the process.

Question 3: What is the tolerance clearance in briquetting?
Answer: The mechanical briquetting machines essentially consist of a screw rod (also referred to as a spiral spindle) and a sleeve. The briquettes are extruded due to the proper tolerance clearance between the screw rod and sleeve. As the material is subjected to high temperatures and pressures, it gets squeezed within the space between these two components, forming the briquetting zone, known as tolerance clearance.

Question 4: What are the applications of biomass briquettes and pellets?
Answer: Biomass briquettes and pellets are obtained from agricultural and forestry waste and residues and play a significant role in mitigating air pollution and carbon dioxide emissions due to their high density and thermal value. They can replace conventional fossil fuels like natural gas and coal. Biomass briquettes and pellets find diverse applications in domestic fireplaces, small to medium-sized biomass boilers, and in the industrial sector for power generation and heating.

Question 5: What distinguishes the KINGMAN (KMEC) crusher series from the hammer mill series?
Answer: The working principles of these two types of pulverizers differ significantly.
KINGMAN (KMEC) Wood Hammer Mill operates with high-speed rotation of hammers, making it suitable for raw materials with higher brittleness, yielding a uniform particle size. It is effective for both medium and deep crushing, featuring compact structure, larger capacity, improved crushing efficiency, and lower energy consumption.

In contrast, the KINGMAN (KMEC) Crusher combines chipping and smashing techniques. The cutterhead chips raw materials into smaller wood pieces, which are then crushed into a powdery form by hammer plates. This series includes single and double roller crushers, characterized by low power consumption and low powder rate, although the lifespan of quick-wear parts is generally shorter compared to the hammer mill.

Question 6: What are the characteristics and definition of charcoal produced by a briquette machine?
Answer: Definition: To produce charcoal, a briquette machine processes various biomass materials such as sawdust, peanut shells, rice husks, and corn stalks into briquettes. Prior to this, raw materials must undergo preliminary treatment involving crushing, drying, and sifting. The briquette machine itself requires both high temperature and high pressure, necessitating the installation of a pre-heating coil. It can also be fitted with molds of various shapes, including cylindrical, diamond, or square, enabling the char-making process in a carbonizing furnace.

Features: Compared to traditional charcoal, briquette machine-produced charcoal boasts enhanced mechanical strength, high carbon and thermal values, extended burning duration, and lower ash content. The burning performance is significantly improved—by two to four times—and is distinguished by the lack of smoke and unpleasant odors.

Question 7: What is the process of carbonization for briquettes?
Answer: To convert briquettes into charcoal, the carbonizing furnace plays a crucial role through dry distillation. The process begins simply: center-hollow briquettes or even raw materials such as tree branches and twigs can combust spontaneously at their surface, leading to their decomposition into combustible gases, tar, and wood charcoal under anoxic conditions.

Materials within the furnace undergo a transformation process that includes kindling, heating, drying, high-temperature decomposing, combustion of gases at the material surface, increased decomposition, and ultimately leading to the production of black matter, combustible gas, and tar. This entire sequence consists of temperature increase, heat retention, and subsequent temperature decrease.