Straw gas, produced by a biomass gasifier from agricultural waste such as straw, contains various impurities and is typically at a high temperature, making it unsuitable for direct use without purification. The main contaminants found in straw gas include ash, fine carbon particles, tar, and moisture. These impurities can significantly affect the performance and longevity of gas utilization systems, with tar being one of the most problematic components.
Tar constitutes roughly 5% of the total energy content of straw gas. However, when the gas cools down, this tar becomes difficult to combust efficiently, reducing the overall energy yield. Additionally, tar tends to condense at lower temperatures, mixing with water, carbon particles, and ash. This can lead to blockages in gas pipelines, valve malfunctions, and damage to pump rotors. It also has a corrosive effect on metal components, which can shorten the lifespan of equipment.
Incomplete combustion of tar often results in the formation of carbon black and other particulate matter, which can severely damage internal combustion engines and gas turbines. Furthermore, the presence of tar and its associated odors after combustion poses health risks to users, making effective purification essential for safe and efficient use.
To address these issues, a combination of purification techniques is usually employed. The primary goal of straw gas purification is to remove impurities such as ash, carbon particles, moisture, and tar, while also cooling the gas. Different technologies are applied depending on the type and size of the contaminants.
One common method is dust removal, which focuses on eliminating ash and fine carbon particles. There are two main approaches: dry dust removal and wet dust removal.
Dry dust removal involves separating solid particles from the gas stream without introducing moisture. This method maintains the gas’s original temperature and is typically divided into mechanical and filtration methods. Mechanical dust removal uses inertial forces to separate larger particles (as small as 5 microns), with cyclone separators being the most widely used. Filtration, on the other hand, employs porous media to capture finer particles (down to 0.1 microns), offering high efficiency but requiring more space and careful dust disposal. Filters are generally used for final purification stages.
Wet dust removal, in contrast, uses liquid—usually water—to trap impurities. As the gas passes through a liquid layer, film, or droplets, the particles adhere to the liquid and are removed. Common equipment includes bubble columns, spray towers, packed towers, and venturi scrubbers. This method is particularly effective for removing both particulate matter and some gaseous contaminants.
Garlic Granules
Dehydrated Garlic granules encompass a range of versatile products, each with its own unique size and texture, offering a convenient and flavorful alternative to fresh garlic. Within this group, variations include garlic minced 8-16 mesh, garlic ground 16-26 mesh, garlic ground 26-40 mesh, and garlic granules 40-80 mesh.
These granules are produced through a meticulous dehydration process that preserves the potent taste and aroma of fresh garlic while ensuring an extended shelf life. Each variant within the granule spectrum offers different particle sizes, allowing for various culinary applications.
Garlic minced 8-16 mesh comprises larger granules, offering a noticeable texture and robust garlic flavor. On the other hand, garlic ground 16-26 mesh and 26-40 mesh possess smaller particle sizes, providing a finer texture while maintaining the strong garlic essence.
Garlic granules 40-80 mesh stand out for their fine texture, making them ideal for even dispersion and quick integration into dishes. Their versatility allows for effortless incorporation into seasoning mixes, marinades, sauces, soups, and various recipes, imparting a consistent garlic flavor without the need for peeling or chopping fresh cloves.
In essence, dehydrated garlic granules in their various mesh sizes offer convenience, versatility, and a prolonged shelf life while delivering the intense flavor and aroma characteristic of fresh garlic, making them an indispensable ingredient for enhancing culinary creations.
Garlic Ground, Garlic Minced, Garlic chopped, Garlic granulated
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