No 11 Effluent System 2 PDF

The effluent export pump will trip on sump low level, the sump need to be kept at low level to prevent the sump overflowing in the event of a sudden rain storm or chemical spillage. Two actuating valves are fitted on the inlet line to the sump, the purpose of these valves are to divert the effluent...

The effluent export pump will trip on sump low level, the sump need to be kept at low level to prevent the sump overflowing in the event of a sudden rain storm or chemical spillage. Two actuating valves are fitted on the inlet line to the sump, the purpose of these valves are to divert the effluent into the sump or to bypass the sump especially when it is raining to prevent recovering rain water. (This it to reduce the effluent volumes) There are a few different scenarios that will determine the recovery process.  Prill fall out, especially after winter. At least four hours recovery is needed or if W14 conductivity is low, recovery can be stopped.  Rain fall frequency during summer, once a week, twice a week and every afternoon etc. at least one hour recovery or if W14 conductivity is low, recovery can be stopped.  Continuous rain fall for few days, only recover the first hour and keep eye on W14 conductivity, let it go if the conductivity is low.  Effluent dumping from Prill Plants, recover all if possible.  Effluent Conductivity through W14 effluent meter to be monitored all the time. Main effluent Sources: No.9 Nitric Acid:  Draining & purging of Evaporator  Emptying the Drip Acid Pits, at the Nitric Acid Stock Tanks, at the Column and at the Torpedo Tanks next to DCS.  Draining Nitric Acid systems for Maintenance  Tanker Loading Area, nitric Acid Spillages.  Overflowing of Nitric Acid Stock tanks No.11 Nitric Acid:  Purging and draining of the Evaporator  Draining Ammonia lines for Maintenance  Pumping Drip acid Pit empty  Purging of Heat Exchangers every four hours  Overflowing of Nitric Acid Stock tanks ANS Plants:  Draining Nitric Acid systems and Pumps for Maintenance  Draining ANS Systems for Maintenance  Dumping A/N Condensate when Tank Full or if No.11 is off line.  Draining & Steam out ANS lines to prevent chocking of ANS.  Draining Nitric Acid pumps and lines on the ANSSER plant for Maintenance  Overflowing of Nitric Acid Stock tanks  Overflowing of ANS Stock tanks Bulk Store Pit:  Pumping the bulk store pit empty after washing or rain. Prilling Plants 3&4:  Start-up Effluent, draining of VO2 to warm up system.  Draining of ANS Lines and Pumps for Maintenance 114  Draining of Sulphate Pumps and Lines.  Dissolving Ammonium Nitrate Prills with Effluent water.  Draining Steam Systems for maintenance.  Recycle Effluent  Scrubber Effluent  Washing of systems for Maintenance; Elevators, Ducting’s, Tower Bottom etc.  Purging of the Spray heads. Tank farm:  Overflowing of ANS Stock Tanks  Draining of Pumps and lines for Maintenance.  Preparing Stock tanks for Maintenance. 115 STRONG EFFLUENT SOURCES TO S8 MONITORING POINT UAN / TANK FARM AREA UAN Circulating Pump Glands UAN Export pump Glands UAN pump filter UAN Pump Bund Area Tank 10 / 11 circulating pump glands Tank 10 / 11 Bund area Tanker filling points drain area Tanker filling nozzles steam out points condensate Pump bund area at tanks 7, 8 & 9 S MONITORING POINT ANS PLANTS Bulk Store Sump Pump ANS Lab Sink Steam Traps outside tank 4 Ammonium Sulphate Area Condensate Tank Overflow Condensate Pump Glands ANS 1 Scrubber circulation pumps ANS 1 Scrubber overflow Tank 6 Circulation Pumps Glands Tank 6 Overflow line ANS 1 Nitric acid pump bund area Tank 5 overflow line Tank circulating pumps gland leak Steam leaks at pumps Condensate traps Tank 5 circulation pumps bund area Tank 3 overflow line Tank 4 overflow line Tank 3 circulation pumps Tank 4 circulation pumps Condensate and steam leaks at tank 3 & 4 Circulating pump area Tank 3 and 4 Bund area ANS 2 Tank 1 Circulating Pumps ANS 2 Tank 2 Circulating Pumps 116 Scrubber circulating Pumps Condensate Pumps Scrubber Overflow Tank 1 Overflow Tank 2 Overflow ANS 2 Bund Area ANS 2 Nitric acid pump1 ANS 2 Nitric acid pump 2 ANS 2 Nitric Acid Pump Bund Nitric Acid Torpedo Tanks Overflows ANS 2 Demister circulating tank overflow ANS 2 Demister circulating pumps leaks ANS 2 Demister pH control Nitric Acid Pump Bund Area Contaminated Condensate Export Pumps Contaminated condensate Tank Overflows S7 Monitoring Point Seepage from Embankment Drains (Over flow from RDP TANKS Drains) Effluent Lagoons No 10 Nitric Acid Sump Ammonia stripper drain point Effluent sump overflow Demin Plant Regeneration Effluent Raw Water Tank Overflow Overflow of day tank Leaking Drain on NaOH day Tank Caustic Soda Storage Tanks Bund Area Overflow of day tank Hydrochloric acid scrubber drain Leaking Drain on HCl day Tank Hydrochloric Acid Storage Tank Bund Area Leaking Shower Chemical Offloading point Drain S8 Monitoring Point 117