Waste product of fires
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Ash or ashes are the solid remnants of fires. Specifically, ash refers to all non-aqueous, non-gaseous residues that remain after something burns. In analytical chemistry, to analyze the mineral and metal content of chemical samples, ash is the non-gaseous, non-liquid residue after complete combustion.
Ashes as the end product of incomplete combustion are mostly mineral, but usually still contain some combustible organic or other oxidizable residues. One of the most well-known types of ash is wood ash, a product of wood combustion in campfires, fireplaces, etc. The darker the wood ashes, the higher the content of remaining charcoal from incomplete combustion. Ashes can vary significantly in type and composition. Some ashes contain natural compounds that enhance soil fertility, while others may possess chemical compounds that can be toxic but can break down in soil through chemical changes and microbial activity.
In addition to being a waste product, ash can also serve as a disinfectant (alkaline). The World Health Organization even recommends ash or sand as alternatives for handwashing when soap is unavailable.
Natural occurrence
Ash occurs naturally from fires that burn vegetation and may either enrich the soil or pile up for extended periods until it carbonizes into coal.
Composition
The ash's composition varies based on the burned product and its source. The "ash content," derived from incinerating materials at temperatures ranging from 150 °C (302 °F) to 900 °C (1,650 °F), is a critical factor in assessing its characteristics.
Wood and plant matter
The ash composition from wood and other plant matter varies significantly, influenced by plant species, plant part (like bark or trunk), soil type, and climatic conditions. Wood ashes typically comprise between 20% and 50% calcium as calcium oxide, with abundant potassium carbonate.
For example, ash collected from wood boilers mainly consists of carbonaceous materials (such as unconsumed embers) along with alkaline metal oxides. The pH of wood ash, which generally ranges between 10 and 13, is due to the presence of strong bases such as calcium, potassium, and sodium oxides.
Mineral content in ash can vary depending on the species of trees burned, which directly influences the type of chemical compounds present.
Specific types
Cremation ashes
Cremation ashes, also called "cremains," are the remains left from cremation, often appearing as a grey powder. Though commonly referred to as ashes, they are primarily composed of powdered bone fragments due to the cremation process.
Joss paper ash
Joss paper ash presents significant environmental concerns, as burning these materials releases a multitude of toxic components into the atmosphere. Studies have indicated that such burning could significantly contribute to air pollution.
Wildfire ash
Recent studies have highlighted that ash left after wildfires can contain high levels of heavy metals, such as lead and arsenic. This underscores the need for thorough waste management to mitigate environmental dangers posed by accumulated ash.
Ash Handling Process
The ash handling systems in steam generating plants collect ash and residue from specific points in the boiler's flue gas stream. These systems transport the ash to storage or disposal locations. Due to the varying characteristics of ash throughout the handling process, it's common to have separate systems for different types of ash, such as bottom ash and fly ash.
For more information, please visit Ash Handling Pump supplier.
Ash handling is crucial for environmental controls in combustion processes, ensuring that ash is efficiently removed and disposed of, reducing potential hazards associated with ash accumulation.
Our company, as an Ash Handling Pump wholesaler, is committed to providing high-quality solutions and equipment for effective ash handling processes across various industries.
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