How to Solve Press Section Paper Sheet Broken?

The paper sheet broken is common problem occur in paper machine section. Reducing and eliminating paper breakage in the press section is the key to ensuring efficient operation of paper machines. There are many reasons that can cause paper breakage in the press section. Only by correctly and timely analyzing the causes of paper breakage can effective solutions be taken to ensure that the paper machine operates in an efficient and energy-saving mode.

The following reasons should be taken seriously for wet paper sheet breakage in the press section:

1) Uneven sizing of wet paper on the forming fabric, excessive moisture content of wet paper before pressing, and poor edge cutting of wet paper;

2) The pulp contains substances such as humus, impurities, and chemical flocs;

3) The pick up roll and groove, blind hole, suction press roll are partially blocked;

4) Leakage at the sealing strip of the vacuum suction roll chamber and incorrect vacuum chamber angle;

5) Partial water leakage from the press roll into the press felt;

6) Uneven line pressure in the press area of the press roll, poor surface condition of the stone roll (steel roll), and uneven cleaning of the roll surface by the doctor blade;

7) The running speed between the press rolls is unstable and uncoordinated, and the running span of wet paper sheets in the press section is too large;

8) The washing of press felt is not clean and uniform, the water content of the press felt is too high, the water holding space and elasticity are insufficient, and the dehydration efficiency is not enough;

9) The angle of the wet paper sheet entering and exiting the pressure zone is unreasonable, the operating state is poor, and the height of the press felt entering and exiting the pressure zone is unreasonable;

10) Excessive moisture regain in the paper output area leads to a decrease in paper strength. Reasonably selecting the press felt, optimizing the path of paper web and felt entering and exiting the pressing zone are the key to reducing moisture regain.