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Preparation & Planning

Planning & Production including Reasons & Procedures

Muhammad785
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Preparation & Planning

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  1. CMMS Progress Report&Plant Shutdown/Startup

  2. 1- Preparation & Planning1.1-Sorting Objectives

  3. PLANT SHUTDOWN: • Reasons for Shutdown: • Product results getting out of range. • i.e Increase Methanol%, acid %. • Shutdown Planning: • Shutdown day and time is planned. • Mcpd stock and dispatch stock. • Shutdown Procedure: • Methanol and water feed rate is decreased • RPM of Compressors are decreased • And open the by-pass valve of vaporizer to Absorption Column gradually closed the direct valve of vaporizer to reactor line. • The reactor takes approximately five to six hours to cool down • After that the plant is handed over to maintenance Department.

  4. Steps towards the plant startup S-S Mesh sheet fixed on the top of reactor. Catalyst (Ag) 40, 60, 80, mesh size put layer on the cupper sheet/met in the reactor. Level of vaporizer 16% fill with water from T302 and drain for cleaning vaporizer. After washing of vaporizer filled with water of 16% level and then took methanol from T9 by pump 109A/B/C and maintains level 46% of vaporizer. Check conductivity as it must be as less as possible. After maintaining the vaporizer level start circulation by P-401A and then B. Take steam from boiler and pressure should greater than 2.5 or 3 bar. Vaporizer level must greater than 65 degree Celsius or at 66 degree Celsius temperature. Check density after twenty minutes and increase flow rates By pass should open and vaporizer to reactor valve closed at that situation only. Steam when take boiler, open valve header to vaporizer and also open valves of reactor top, tracing. Density must at 0.942 to 0.946 gm/cm3 at temperature 66 degree Celsius.

  5. Density checked at 20 degree Celsius. 14.Open valve of vaporizer to reactor slowly, as vapors occur in reactor then open ignition, firstly open from control room then air open and flame occurred. 15. Blower RPM at starting position of 20 RPM. 16. Control 409A, HCV, TCV as per requirement. 17. All Circulation pumps start. 18. Cooling tower starts indication to utility. 19. All setting as followed till the temperature reached at desired value

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