Document kmJQv9k8vJ9VN0y6NeddjqVVJ

Ethanolamines/Glycol Ethers In Plant Training (IPT) Section Number Issue Number Origination Date Revision Date Section Test 13 1.3 07-30-91 12-23-97 :13 Author: Mike Viator Ethanolamines Water Removal Control Module T-240 Answers: 1. State what should be done if the recirculation flow is lost to E-240. Cut off the steam flow and correct the flow problem. 2. State what type cooling tower water should be used on E-241. All fresh water 3. Explain what could cause the loss of T-240 overheads to Environmental Operations. T-240 overheads emergency block valve (EBV) to environmental operations works on a difference in pressure trip control scheme. As the header pressure on the line to environmental operations approaches P-241 discharge pressure, the EBV trips to keep the liquid in the header from back flowing into our system. 4. Explain how the bottoms temperature control scheme works on T-240. The temperature controller (TIC-2152) is cascaded to the steam control valve (FIC-2163) to control the bottoms temperature on T-240. 5. Explain how the reflux temperature control scheme works on T-240. The VAX computer controls tray #13 temperature through the reflux controller (FIC-2151). 6. State what you would do if T-240 bottoms percent water were .09. Increase the temperature set point on controller TIC-2152. 7. State what you would do if T-240 overheads percent MEA were .18. On the VAX computer, increase the temperature set point on tray #13 which would decrease the column reflux. Date Printed: April 18,1998 Paper Copies Of This Document Are Uncontrolled & Not Subject To Update. The Controlled Document Resides In File: T:\ORIGINAL\IPT\EACONTRL\PURIFICA\ASOST240.DOC Page 1 Of 3 DO A 058641 CONFIDENTIAL 8. Explain what process variable would cause the pressure on T-240 to rise. State what should be done to correct this problem. A. T-230 bottoms temperature (tray #4) too cool, ammonia in T-230 bottoms feed to T-240. B. Increase T-230 temperature control set point and flush VP-240 with fresh water. 9. State what should be done if you loose VP-240. Put EA-280 on T-240 until the vacuum pump can be put back in service. 10. State the water spec for T- Date Printed: April 18, 1998 Paper Copies Of This Document Are Uncontrolled & Not Subject To Update. The Controlled Document Resides In File: T:\ORIGINAL\iPT\EACONTRL\PURIFICA\ASOST240.DOC Page 2 Of 3 DO A 058642 CONFIDENTIAL