Check that there will be sufficient pulp to start up, and that there is a place to put the pulp
downstream.
-Check that supply and sufficient pressure of all required waters, chemicals,
steams and air are available.
-Check that all hand valves are in position as shown on the flow sheet.
-Start the equipment on water according to preceding sections with the following
exceptions:
• Leave the suction valve of the press feed pump closed.
• Keep the dilution valve to the dilution conveyor closed.
• Start the ventilation fans.
The system is now ready for pulp.
Starting the DPA Press on Pulp
1. Increase roll speed in MANUAL control to about 7 - 8 rpm.
2. Switch the dilution water flow controller to dilution conveyor to AUTOMATIC or
CASCADE, if available, to the setpoint corresponding to intended production rate.
3. Switch the major dilution to the press feed tank to AUTOMATIC.
4. Set the feed consistency controller to AUTOMATIC with the setpoint 3.0%
5. Start the press feed pump. This will open the HS valve on the suction of the press feed
pump.
6. Open the press feed valves to the position corresponding to the intended production
and switch to AUTOMATIC.
Take note of the vat pressures of the press. These should not increase too much.
7. When flow and consistency of the pulp to the press have stabilized, the torque
controller is given a setpoint of the prevailing measuring value and is switched on
AUTOMATIC. Notice that the torque of the press rolls stays stable and the roll speed
varies according to loading. The desired consistency of the pulp after the press is
obtained by changing the torque which will quickly change the roll speed.
With the help of level pipe pressure controller the filtrate level
Check that there will be sufficient pulp to start up, and that there is a place to put the pulpdownstream.-Check that supply and sufficient pressure of all required waters, chemicals,steams and air are available.-Check that all hand valves are in position as shown on the flow sheet.-Start the equipment on water according to preceding sections with the followingexceptions:• Leave the suction valve of the press feed pump closed.• Keep the dilution valve to the dilution conveyor closed.• Start the ventilation fans.The system is now ready for pulp.Starting the DPA Press on Pulp1. Increase roll speed in MANUAL control to about 7 - 8 rpm.2. Switch the dilution water flow controller to dilution conveyor to AUTOMATIC orCASCADE, if available, to the setpoint corresponding to intended production rate.3. Switch the major dilution to the press feed tank to AUTOMATIC.4. Set the feed consistency controller to AUTOMATIC with the setpoint 3.0%5. Start the press feed pump. This will open the HS valve on the suction of the press feedpump.6. Open the press feed valves to the position corresponding to the intended productionand switch to AUTOMATIC.Take note of the vat pressures of the press. These should not increase too much.7. When flow and consistency of the pulp to the press have stabilized, the torquecontroller is given a setpoint of the prevailing measuring value and is switched onAUTOMATIC. Notice that the torque of the press rolls stays stable and the roll speedแตกต่างกันไปตามโหลด ความสอดคล้องต้องของเนื้อเยื่อหลังจากสื่อมวลชนได้ โดยการเปลี่ยนแรงบิดซึ่งจะเปลี่ยนม้วนความเร็วอย่างรวดเร็วช่วยควบคุมความดันท่อระดับระดับสารกรอง
การแปล กรุณารอสักครู่..
![](//thimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)