In the paper industry, sludge treatment is a crucial link. However, many paper mills find that the moisture content of the sludge is still high after sludge compaction, which brings no small challenge to the subsequent transportation, storage and disposal. In order to effectively solve this problem, sludge enhancer came into being and became an effective means to reduce the moisture content of paper making sludge.
Reasons for high water content of papermaking sludge
The main reasons for the high water content of papermaking sludge are as follows:
Complex sludge properties: paper sludge contains a large number of fibers, fillers, colloids and other impurities, these impurities make the structure of the sludge loose, difficult to form a tight mud cake, resulting in high water content.
Improper mud pressing process: improper parameter setting of mud pressing process, such as insufficient pressure, insufficient filtration time, etc., will also lead to high sludge moisture content.
Lack of effective conditioning: Before mud pressing, if the sludge has not been effectively adjusted, its dewatering performance will be greatly reduced, which will affect the mud pressing effect.
Principle of action of sludge synergist
Sludge enhancer is a chemical agent specially used to improve the dewatering performance of sludge. Its principle of action mainly includes the following aspects:
Change the sludge structure: the sludge synergist can destroy the colloidal structure in the sludge, make the connection between the sludge particles more closely, and form a mud cake that is easier to dehydrate.
Reduce sludge viscosity: By reducing the viscosity of the sludge, the sludge synergist can reduce the resistance of the sludge in the filtration process and improve the dehydration efficiency.
Promote water release: sludge synergists can interact with water molecules in the sludge to promote the release and discharge of water, thereby reducing the water content of the sludge.
Application of sludge enhancer in paper making sludge treatment
In the paper sludge treatment, the application of sludge enhancer can significantly improve the mud pressing effect and reduce the sludge moisture content. The specific application steps are as follows:
Sludge conditioning: Before mud pressing, the sludge synergist is added to the sludge in accordance with a certain proportion, and fully stirred and mixed, so that the agent and the sludge fully contact and react.
Mud treatment: the conditioned sludge is sent to the filter press for mud treatment. Due to the action of sludge synergist, the dewatering performance of sludge will be significantly improved, and the moisture content of mud cake after mud pressing will be significantly reduced.
Subsequent treatment: The dehydrated sludge can be subsequently transported, stored and disposed of. As a result of the reduced water content, the volume and weight of the sludge will be significantly reduced, thus reducing treatment costs and environmental risks.
Application examples and effects
After the introduction of sludge enhancer in a paper mill, the paper sludge was treated by pressing mud. The results show that the moisture content of the sludge after compaction is reduced from more than 70% to less than 50%. This not only reduces the volume and weight of the sludge, reduces the transportation and disposal costs, but also improves the environmental protection and resource utilization of the sludge treatment.
Conclusion
The high water content of papermaking sludge is an urgent problem to be solved. By introducing sludge enhancer for sludge conditioning and sludge pressing treatment, the moisture content of sludge can be significantly reduced, and the treatment efficiency and environmental protection can be improved. For paper mills, it is a wise choice to choose a sludge enhancer for sludge treatment. It can not only reduce processing costs and environmental risks, but also enhance the environmental image of enterprises and market competitiveness.