Operating Procedures for Spiral Type Sludge Dewatering Machine

1. Pre-Start Inspection

         1) Inspect the equipment for any severe deformation or extensive damage to the paint (minor abrasions during transportation are normal).

         2) Check if there are any foreign objects in the mixing tank(sludge water will be coagulation in this tank, and we also call it a coagulation tank), whether the filter body has emptied the sludge, and whether there are any mud blocks at the head of the spiral shaft.

2. Preparation

          1) Ensure that the equipment's pipeline connections are correct and that it operates normally after being powered on.

          2) Prepare the dosing system and the necessary chemicals for the equipment, which is typically PAM cationic, with a molecular weight of 8000-10000. (PS: The usual default is 2-5kg of powder added to 1000L of water, diluted and stirred for 60 minutes. The specific amount may vary depending on the site conditions, and the data is for reference only.)

3. Starting Procedure

          1) Power on the machine and start the main motor and mixer, observe the direction of rotation of the main motor to ensure that it is correct;

          2) Start the coagulant dosing pump, sludge feeding pump, and coagulation mixing motor in sequence;

          3) Adjust the sludge feeding and dosing amount to ensure that the sludge coagulation particles are larger than the size of soybeans, and that the mud and water are separated (refer to Figure 1 and Figure 2);

          4) Use the frequency converter to adjust the speed of the entire spiral shaft (range: 30-50, refer to Figure 3), and adjust the spacing of the End Plate by tightening the mud pressure plate screw (refer to Figure 4) to achieve the best processing volume and moisture content.

           
                              Figure 1                                                                                       Figure 2    
       
                              Figure 3                                                                                        Figure 4
       
4. Post-Startup Inspection

         Check if the spiral shaft is rotating normally if the sludge level in the mixing tank is stable if all rotating components are operating normally, and if there are any abnormal noises.

5. Shutdown Procedure

          1) Turn off the sludge feed pump to stop the sludge feeding;

          2) Turn off the coagulant dosing pump and the dosing system to stop dosing;

          3) Drain the mixing tank and stop the coagulation mixing motor;

          4) Wait for all the sludge to be discharged (no less than 30 minutes), manually spray the filter body for 5 minutes, and rinse the equipment clean;

          5) Turn off the power supply.

6. Daily operation precautions

          1) Set a reasonable start-stop time for automatic operation, and complete the entire process as required;

          2) Adjust the "flow control tube" to the appropriate height according to different sludge concentrations;

          3) Overloading of sludge is strictly prohibited to prevent sludge from accumulating in the thickening section of the dewatering machine due to excessive sludge;

          4) Large slag, wood, metal blocks, and other hard solids are strictly prohibited from flowing into the sludge pump and filter of the dewatering machine;

          5) When manually cleaning, do not pour water onto electrical components such as motors and control boxes;

          6) Regularly replace or add gear lubricating oil to the reducer(once every three months);

          7) Check whether the nuts at various locations such as the filter body are loose regularly (once a month);

          8) Conduct maintenance every three months.

Daily Inspection Items

Precautions For Long-term Downtime

When the machine is shut down for more than one week (2-3 days for easily dried sludge), it is important to take the following precautions to protect the machine: