Calcium carbide slag sludge refers to the solid waste sludge containing lime, calcium chloride and other substances generated in the production process of calcium carbide, which needs dehydration treatment to reduce the volume, increase the solid content, and facilitate subsequent treatment or disposal. Dewatering treatment helps to reduce the volume and weight of sludge, reduce the treatment cost, and reduce the impact on the environment.
For the dehydration treatment of calcium carbide sludge, the following methods can generally be used:
1. Centrifugal dewatering: use Centrifugal dehydrator The high-speed rotating centrifugal force is used to quickly separate the water in the sludge, so as to achieve the dehydration effect.
2. Filtering and dewatering: the water in the sludge is filtered out through the filter medium through filtering equipment (such as belt filter press, plate and frame filter press, etc.), so as to achieve dewatering treatment.
3. Dehydration with chelating agent: add appropriate chelating agent (such as magnesium oxide, aluminum hydroxide, etc.) to improve the structure of sludge, so that water can be squeezed out more easily and improve the dehydration efficiency.
4. Air flotation dehydration: use the air flotation principle to inject air into the sludge to generate bubbles to float the solid particles, so as to achieve Solid-liquid separation 。
5. * Chemical dewatering: use chemical agents (such as polymer flocculants) to improve the structure of sludge, and improve the dewatering efficiency in the process of centrifugal or filter pressing dewatering.
The dehydrated calcium carbide sludge can reduce the transportation and disposal costs. After the solid content is increased, appropriate follow-up treatment methods can be selected, such as incineration, landfill or resource utilization, to achieve the purpose of waste reduction, resource utilization and environmental protection. In the process of dewatering treatment, appropriate dewatering methods should be selected according to the characteristics of sludge to ensure dewatering efficiency and treatment quality.
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