Vehicle mounted mud solidification treatment equipment

The performance of the vehicle mounted mobile filter press lies in its scientifically reasonable working principle and highly optimized workflow. This system achieves efficient dewatering and resource utilization of river sediment through the synergistic effect of physical pressing and chemical conditioning. A deep understanding of its core technical principles is of great significance for correctly selecting equipment parameters, optimizing operational processes, and solving problems in practical applications.

High pressure diaphragm pressing technologyIt constitutes the core dehydration mechanism of the vehicle mounted mobile filter press. This technology achieves deep dehydration through two stages of pressure application: in the initial stage, a medium pressure of 0.4-0.8 MPa is used to quickly remove free water from the sludge through the filter cloth; In the second stage, the pressure is increased to 1.6-3.0MPa, and the bound water between the sludge particles is discharged through further compression of the elastic diaphragm, significantly reducing the final moisture content of the sludge cake. Some advanced models also introduce high-pressure air flow technology (0.6MPa), which introduces compressed air after mechanical pressing, penetrates the pores of the mud cake, takes away residual moisture, and further reduces the moisture content to below 40%. The design concept of this multi-stage pressurization not only ensures dehydration efficiency, but also avoids the problems of filter cloth blockage and excessive equipment wear that may be caused by a single high pressure.

Preprocessing systemIt is a crucial prerequisite for ensuring the effectiveness of pressure filtration. The composition of river sediment is complex, often containing large particle impurities such as branches and stones, as well as colloidal organic matter. Direct pressure filtration can cause equipment damage or low efficiency. Modern vehicle mounted mobile filter presses are usually equipped with vibration screening devices (sieve holes 45-75 μ m) to remove coarse impurities, followed by the addition of PAM (polyacrylamide) flocculants or lime and other conditioning agents to disrupt colloid stability and improve the dewatering performance of sludgeIn a project in Jiangsu, by optimizing the PAM dosage (0.3% -0.5% dry mud weight), the pressure filtration cycle was shortened by 25% and the moisture content of the mud cake was reduced by 8 percentage pointsThe scientific control of the preprocessing stage has laid a solid foundation for subsequent high-pressure dehydration.

Vehicle mounted mobile filter pressTypical workflowIt can be divided into four standardization stages:

• Mud collection and transportationThe dredging ship extracts the silt from the riverbed through a twisting and suction system, and after preliminary screening, it is transported to the vehicle mounted mixing tank through a mud pump. At this stage, real-time monitoring of the concentration and viscosity of sludge is crucial for adjusting subsequent process parameters. Some advanced systems are equipped with online concentration meters, which can automatically adjust the feed concentration.

• High pressure filtration dehydrationThe pre treated mud is pumped into a filter press composed of multiple filter plates. The surface of the filter plate is covered with a special material filter cloth (usually polypropylene or nylon), and under the drive of the hydraulic system, the filter plate is tightly closed to form a closed filter chamber. As the pressure gradually increases, water is discharged through the filter cloth, and solid particles are trapped to form a filter cake. The pressure curve control at this stage is particularly critical, and it is necessary to dynamically adjust the pressure rise rate and holding time according to the characteristics of the sludge.

• Automatic discharge of mud cakeAfter dehydration is completed, the hydraulic system drives the filter plate to release, and the configured belt conveyor automatically transports the mud cake out and loads it onto the vehicle. Modern equipment often adopts fully automatic unloading design, avoiding the safety risks of manual operation, and the unloading cycle can be controlled within 5-8 minutesIn the river treatment project in Changsha, Hunan, the automated unloading system has increased the daily processing capacity of the equipment to 1500 cubic meters.

• Filter cloth regeneration and water treatmentAfter unloading, the high-pressure water gun automatically cleans the filter cloth to maintain its filtering performance (a single set of filter cloth can be recycled for more than 500 times). The filtrate produced by pressure filtration enters the sedimentation tank and membrane filtration system for further purification, reducing the suspended solids content to below 10mg/L and meeting the standards for reuse or dischargeThis closed-loop design significantly reduces water resource consumption and improves overall environmental benefits.