Sedimentation tank is a common equipment in industrial production, mainly used to separate solid particles in liquids. However, over time, the silt in the sedimentation tank can gradually accumulate, affecting the normal operation of the equipment. Therefore, it is very necessary to clean the sedimentation tank sludge regularly. The following will introduce several common methods for cleaning sludge in sedimentation tanks.
1. Mechanical cleaning method.
The mechanical cleaning method is to use mechanical equipment to clean the sludge in the sedimentation tank. Commonly used machinery and equipment include grab dredging machines and scraper dredging machines. The grab dredging machine is suitable for large sedimentation tanks, where the sludge is picked up and transported out by the grab. The scraper dredging machine is suitable for small sedimentation tanks, where the sludge is scraped to the specified position and transported out through the scraper.
2. Chemical treatment method.
The chemical treatment method is to use chemical agents to treat the sludge in the sedimentation tank. Commonly used chemicals include oxidants, reducing agents and flocculants. Oxidants can oxidize and decompose the organic matter in the sludge, reducing agents can reduce the heavy metals in the sludge to a harmless form, and flocculants can agglomerate the particles in the sludge into large blocks. The chemically treated sludge can be more easily removed from the sedimentation tank.
3. Biological treatment method.
The biological treatment method is to use microorganisms to treat the sludge in the sedimentation tank. Commonly used biological treatment methods include activated sludge and biofilm. The activated sludge method is to add activated sludge to the sedimentation tank to allow the activated sludge to adsorb and decompose the organic matter in the sludge, thereby reducing the moisture content and organic matter content of the sludge. The biofilm method is to cultivate the biofilm in the sedimentation tank, so that the biofilm adsorbs and decomposes the organic matter in the sludge, so as to reduce the moisture content and organic matter content of the sludge.
Fourth, the natural drying method.
The natural drying method is to use the natural conditions to dry the sludge in the sedimentation tank. Commonly used natural drying methods include drying and natural air drying. The drying method is to spread the sludge in the sun to dry, and reduce the moisture content of the sludge through evaporation. The natural air-drying method is to spread the sludge in a well-ventilated area to reduce the moisture content of the sludge through natural wind.
5. Comprehensive approach.
The comprehensive treatment method is to combine the above methods to treat the sludge in the sedimentation tank. According to the actual situation, different combinations of methods can be selected for comprehensive processing. For example, most of the sludge can be removed from the sedimentation tank by mechanical cleaning, then the remaining sludge can be treated with chemical treatment, and finally the treated sludge can be dried by natural drying.
6. Precautions.
In the process of cleaning the sedimentation tank sludge, the following points need to be noted: first, to ensure safety and avoid accidents;Secondly, it is necessary to choose the appropriate method and equipment for cleaning;Finally, regular cleaning and maintenance should be carried out to ensure the normal operation of the equipment.
In short, sedimentation tank sludge cleaning is an indispensable task in industrial production. Choosing the right method and equipment for cleaning can ensure the normal operation of the equipment and the smooth progress of production. At the same time, it is also necessary to pay attention to safety and environmental protection issues to avoid harm to the environment and the human body.