17、carry out the protection. When carrying out fault diagnosis, the switch on the CRT menu is set to “stop” or “purge”. symptomPossible causeRemedial measure 1.Incorrect switch position “remote/local-In the “local” position Put the switch of control panel is set to “remote” position 2low conveying main 。

18、 pipe pressure Initiate other compressors, open the valve and check the pressure gauge, pressure switch and pressure transmitter of the air receiver 3.Incorrect dome valve seal pressure signal ， control gas malfunction Check all the dome valve status comparing with the dome valve initial status list.。

19、If the difference occurs, check the control gas and pneumatic panel gas inlet valve, check and adjust the wrong signal feedback conditions. 4Incorrect path-high level probe alarm of silo Select the correct path. Once the high level probe alarm occurs, the ash silo can not convey. 5Incorrect pipe con 。

20、veying pressure switch signal feedback Readjust the pressure switch and check the connection 1：circle not starting 6No pressing the CRT menu circulate key Stop other orders and press the operation key 1.Incorrect dome valve seal pressure signal or limit switch fails to work. Check and adjust the wro 。

21、ng seal pressure single feedback accompanying conditions. according to the maintenance manual, exchange the limit switch if failure occurs. 2.Dome valve not closed completely, and the dome or shaft are blocked. Isolate electrically and pneumatically, remove the pipe from bottom bend, clear vessel. R 。

22、emove the actuator and operate manually, check the limit switch operation 3.Blowing valve not working Under the condition of normal controlling air: Turn on local solenoid, if the blowing valve acts normally, check or change the solenoid, if the blowing valve can not work, repair and change the blow 。

23、ing valve. 2： pump start- up, accomplish ash falling , dome valve is closed, no ash conveying 4.The manual valve of conveying pipeline shut off Open the manual valve 1.Pipeline is blocked and isnt unobstructed. Manual local blockage relief valve. Check the gas supply and power supply. Affirm all the 。

24、 valve working status. From the farmost point of the pipeline, knock the pipe slightly and ensure the position ，isolate the gas supply and power supply, reduce the gas quantity. Remove the pipe where the blockage occurs, investigate the reason and blow the pipe. 2.Arch occurs in the outlet materiel. 。

25、 Check bulk and humidity of the pump outlet material 1.Seal pressure decreases to conveying pressure Check the gas supply pipeline 2.Crazing in the dome valve Replace the seal ,check the clearance between the manual and seal 4：inlet dome valve or vent dome valve leakage (note: some little leakage in 。

26、 the sytem is normal 3.Blockage in the strainer Remove and clear 1.Solenoid is not working full travel. Remove and clear5： air venting continuously through opening/closi ng solenoid 2.dome valve actuator seal leaks Fit new seals Ensure the filter and electric heater plate working condition and ensur 。

27、e the ash in the hopper 。
6： Abnormal ash falling 1If the ash quantity than the normal condition, the conveying pressure is much lower than the normal conveying pressur Knock the ash hopper vibrator and rigid joints Adjust aeration gas quantity Check the vent-pipe condition and eliminate fault Increa 。

28、sing exhausting with the vent valve, accelerate ash falling 1.Improper orifice plate setting ， too fast material flowing Adjust the orifice plate gas quantity 2.Low conveying load Check the vessel filling time, vent valve and vibrator setting, increase the falling ash quantity in the pump 7： bad abras 。

29、ion of pipe /bend 3.Improper pipe bend installation Locate the position 1The gas source pressure is lower than the design requirement Check the air receiver local gas source pressure. 2Feedback gas pipeline is obstructed. Check pressure gauge display of the local pneumatic panel. When the pressure i 。

30、s lower than the feedback pressure, transact as the following 3,4,5 items. 。
3Limit switch non- connection Check connection of the local limit switch and controlling gas pipeline. 4the adjusting bolt need to adjust Adjust the adjusting bolt length 5Gas pipeline connection malposition Check the connec 。

31、tion of seal gas pipeline and gas source pressure 6high pressure gauge setting value Check and adjust the pressure gauge setting value properly 8： incorrect feedback signal of dome valve seal pressure 7Group terminal block connection becoming loosing Check the local pneumatic panel power supply and。

32、the connection PLC cabinet 8Switch can not be closed Check if there being something 3. Dome Valve Maintenance Instructions PROCEDURE FOR REMOVAL OF DOME VALVE Inlet Dome Valve 1.Fully close isolating valve and run the Ash Vessel until empty. 2.Shut down and isolate system. 3.Disconnect and mark nylo 。

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标题：印尼|印尼棉兰2×200MW机组工程气力除灰输送系统设备操作手册总文本1( 二 )