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Russian Reasons For the Decrease in Vacuum Degree of Vacuum Belt Filter
During the operation of the vacuum belt filter, if the vacuum degree decreases, it will directly affect the filtration efficiency and output quality. The reasons for the decrease in vacuum degree may include the following aspects.
Vacuum System Leakage
Leakage in pipeline or interface
The vacuum pipe joints are not tightly sealed, causing air to enter and reducing the vacuum degree. The vacuum pipeline between the vacuum pump of the vacuum belt filter and the water-steam separator, the filtrate pipeline flange interface, and the valve are not tightly sealed and leak, resulting in a reduction in vacuum.
Solution: Check all connection parts, especially the joints between the hose and the hard pipe, to see if there are any looseness or cracks. If there are any, solve them in time.
Damaged vacuum box seal
The seal at the bottom of the vacuum box is aged, damaged, or improperly installed, causing vacuum leakage.
Solution: Replace the seal and ensure it is installed correctly.
Damaged filter cloth or filter belt
If the filter cloth is damaged or worn, air will infiltrate and reduce vacuum efficiency.
Solution: Check and replace the filter cloth regularly to ensure that the filter cloth is properly tensioned.
Decreased Efficiency of Vacuum Pump
Vacuum pump wear or blockage
After long-term operation of the vacuum pump, internal parts (such as blades and bearings) wear, affecting the vacuum pumping capacity.
Solution: Regularly maintain the vacuum pump and replace worn parts when necessary.
Vacuum pump oil pollution or insufficient
For oil-sealed vacuum pumps, insufficient oil quality and oil quantity will reduce the pump’s working efficiency.
Solution: Replace or replenish vacuum pump oil to ensure that the oil is clean.
The vacuum pump exhaust port is blocked
Blocking the exhaust port will affect the discharge of air and cause the vacuum degree to decrease.
Solution: Clean the exhaust port to ensure smooth flow.
Filter Media is Clogged
Filter cloth is clogged
After long-term use, solid particles will accumulate on the surface of the filter cloth, affecting air permeability and reducing vacuum suction.
Solution: Clean or replace the filter cloth regularly.
Too much residue on the filter belt
Too much filter cake remains on the surface of the filter belt, which hinders air circulation and leads to insufficient vacuum suction.
Solution: Optimize the scraper or flushing system to keep the filter belt clean.
Clogged inside the vacuum pipeline or vacuum box
During the filtration process, tiny particles may enter the vacuum pipeline or vacuum box, causing the channel to be blocked.
Solution: Check and clean the pipeline regularly to keep it unobstructed.
Abnormal Operating Parameters
The load is too high
Feed concentration is too high or feed volume is too large, resulting in a thick filter cake layer, affecting the vacuum degree.
Solution: Adjust feed volume and concentration to optimize the filtration process.
Improper vacuum setting
The vacuum degree set by the equipment control system may be too low, and the parameters need to be adjusted.
Solution: Check and optimize the vacuum setting value.
Conclusion
The main reasons for the reduction of the vacuum degree of the vacuum belt machine include vacuum system leakage, vacuum pump efficiency pipeline blockage, etc. The specific reasons depend on the situation. It is necessary to determine the cause and take corresponding measures according to the specific situation. Regular inspection and maintenance of sealing parts, vacuum pumps, filter cloths, and pipelines can effectively improve the operation stability and filtration efficiency of the equipment.
