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Build a sedimentation tank at the construction site, first discharge the sewage into the sedimentation tank, remove suspended matter and oil substances and neutralize them, and then discharge them into the river after testing to meet the discharge standards. During the drilling and pouring process, a screen is used to separate small gravel, sand and other solid particles in the mud, and the mud is discharged to the first sedimentation tank, the second sedimentation tank, and the third sedimentation tank for full sedimentation. During the construction process, the first sedimentation tank, the second sedimentation tank, and the third sedimentation tank are cleaned in time by an excavator, and the cleaned sediment is transported to the evaporation tank, and after natural dehydration and solidification, it is transported to the storage yard or the waste dump. For the abandoned mud water, flocculants are added to the mud water. Since mud water is a suspended liquid containing a certain am...

Choosing water-saving equipment and integrating recycling functions is the key to fundamentally reducing water consumption. Select advanced sand washing equipment Bucket-type sand washing machine: The structure is simple, with almost no wearables except for the screen, and the failure rate is low. It adopts a circulating water cleaning method and is one of the relatively more water-efficient mainstream choices currently. Integrated sand washing equipment: This type of equipment integrates sand washing, fine sand recycling, dehydration, and even wastewater treatment functions into one, significantly simplifying the process flow. For example, some new equipment uses built-in bubble flushing technology to improve the flushing effect and avoid secondary cleaning waste caused by incomplete cleaning. Mandatory water recycling system Modern sand washing equipment usually comes with a water recycling system, which can collect, filter, and reuse water during the cleaning cycle. This approach ca...

Recently, the Qingdao Metro's environmental protection system has been successfully put into operation, with the continuous separation of crushed stone and sand aggregate from shield tunnel excavation waste. The entire project, from design to implementation, was undertaken by LZZG Heavy Machinery as the EPC general contractor. The system mainly consists of modules for coarse particle separation, mud-sand separation, mud-water separation, tailwater treatment, and recycling. It is equipped with the company's independently developed intelligent management system, enabling on-site separation of sand and gravel from excavation waste, on-site dewatering and drying of slurry, and treatment of tailwater for project recycling. LZZG also manufactures sand washing machines for small and medium-sized construction projects.