API RP 11T:1994 pdf download.Recommended Practice for Installation and Operation of Wet Steam Generators
1.1.1 The Wet Steam Generator used in enhanced oil re – covery is a forced circulation once – through design. It is also known by many other common names such as thermal re – covery heater, oil field heater, etc. The once – throughdesign enables the use of water essentially free ofhardnessand sus – pended solids, but of relatively high total dissolved solids. The equipment normally uses afixed water flow system with some modulation capabilities for reducedoutput. The equip – ment does not contain drums or level controls, which are normally associated with stationary boilers. The Wet Steam Generator can be designed for installation in environments found in oil production areas ofthe world. Minimum opera – tor attention is required.
1.1.2 For the most common sizes of Wet Steam Genera – tors, field construction is held to a minimum. Most units are skid mounted and can be transported by rail, truck, or ship. The Wet Steam Generator is equipped with necessary con – trols and instrumentation to monitor operating pressures, flows, temperatures, etc., to protect personnel and equip – ment.
4.9.1 Check all valves to assure proper position for water flow through Wet Steam Generator. 4.9.2 Operate feedwater pump on manualcontrolto insure water system is filled and flowing through the Wet Steam Generator. Check that type burners are secure. Check that combustion chamber are secure. 4.9.4 Operate combustion air blower on manual control, preferably with dampers open, to insure complete purge of combustion chamber. 4.9.5 Turn on fuel supply system if required. 4.9.6 Follow manufacturer’s recommendations for initial setting of limit devices for initial firing of Wet Steam Generator. 4.9.7 Initial startup should be with pilot gas and main burner manual fuel valves closed. Normally, electrical con – trol switches are turned to automatic position and a reset type start switch is activated to start a programed light off. The WetSteamGeneratorshould go through programed start – up. Combustion control system should lock out indicating flame failuredue to no pilot flame with pilot fuel valves closed. 4.9.8 Reset combustion control system, open pilot gas supply, place burnercontrol in low fire hold and restart sys – tem with main burner manual fuel valve closed. Burner pilot shouldignite, the combustion control system should indicate pilotflame and permit safety fuel valves toopen. Flame fail – ure indication should occur when pilot flame times out with – out lighting main burner due to closed main burner fuel valves. Adjust the pilot burner in accordance with WetSteam Generatormanufacturer instructions. 4.9.9 Reset combustion control system, open both pilot and main burner manual fuel valves. Restart system with burnercontrol in low fire hold position. Observe flame and adjust burner andfuel pressure regulators in accordancewith manufacturer’s instructions for low fire operations.
API RP 11T:1994 pdf download
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