How to Solve Common Vacuum Problems with the Disc Filter
The disc filter is a key machine in the paper making line. It uses vacuum to form a filter cake on the disc surface, so stable and even vacuum is very important. However, this disc filter often faces two main problems. The first problem is low or uneven vacuum. This makes the filter cake thin and wet, which lowers the output. If the vacuum drops in just one area, it usually means that specific sector or its filtrate channel has an issue. The second problem is clogged filtrate channels or broken valves. If a valve does not work, it cuts off the vacuum for that disc. This stops the disc filter from dewatering properly and can even cause filtrate to flow back. Also, leaks in the vacuum pump or pipes can weaken the whole system.
To fix these problems, you can use practical solutions for your disc filter. First, do a sector-wise vacuum check. This is the best way to find out if the problem is in one local spot or the whole system. If it is local, check the filter cloth, channel, and valve for that sector. Second, keep the filtrate draining smoothly. Clean the channels and check the valves often. You can also upgrade the inside of the outlet shaft to improve drainage. Third, keep the feed conditions stable. Sudden high consistency makes the pulp very thick. This increases the turning resistance and puts high stress on the disc filter, which breaks the vacuum stability. The table below shows a simple guide to these problems and solutions:
| Problem | Cause | Solution |
|---|---|---|
| Low or uneven vacuum | Local blockage or system leaks | Do a sector-wise vacuum check |
| Poor filtrate drainage | Clogged channels or broken valves | Clean channels and check valves regularly |
| Filter cake too wet | Unstable feed consistency | Keep feed consistency stable |
| High mechanical stress | Sudden high pulp consistency | Upgrade outlet shaft structure |
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