A manufacturing system for producing polyolefin includes a polymerization reactor, a flash chamber, and a purge column. In certain embodiments, the purge column may receive a solids stream directly from the flash chamber. Further, the purge column may function as a feed tank for an extruder within a
A manufacturing system for producing polyolefin includes a polymerization reactor, a flash chamber, and a purge column. In certain embodiments, the purge column may receive a solids stream directly from the flash chamber. Further, the purge column may function as a feed tank for an extruder within an extrusion/loadout system. According to certain embodiments, the manufacturing system may be configured to consume less than 445 kilowatt-hours of energy per metric ton of polyolefin produced based on consumption of electricity, steam, and fuel gas.
대표청구항▼
1. A method for operating a polyolefin manufacturing process, comprising: polymerizing a monomer in a polymerization reactor to produce a slurry comprising polyolefin particles and diluent;separating a majority of the diluent from the polyolefin particles of the slurry in a flash chamber to produce
1. A method for operating a polyolefin manufacturing process, comprising: polymerizing a monomer in a polymerization reactor to produce a slurry comprising polyolefin particles and diluent;separating a majority of the diluent from the polyolefin particles of the slurry in a flash chamber to produce a flash stream comprising separated diluent, and a solids stream comprising the polyolefin particles and residual diluent;purging the solids stream in a purge column to generate a discharge stream comprising the residual diluent, and to generate a fluff stream comprising the polyolefin particles, wherein the purge column receives the solids stream directly from the flash chamber;feeding the discharge stream from the purge column to a fractionation system;extruding the polyolefin particles of the fluff stream in an extruder to form extruded polyolefin; andpelletizing the extruded polyolefin in a pelletizer to produce polyolefin pellets. 2. The method of claim 1, comprising consuming less than approximately 325 kilowatt-hours of electricity per metric ton of polyolefin pellets produced. 3. The method of claim 1, comprising consuming less than approximately 144 kilograms of steam per metric ton of polyolefin pellets produced. 4. The method of claim 1, comprising consuming less than approximately 2.8 kilograms of fuel gas per metric ton of polyolefin pellets produced. 5. The method of claim 1, comprising employing the purge column as a feed tank for the extruder and utilizing a pressure in the flash chamber to convey the polyolefin particles to the purge column. 6. The method of claim 1, comprising conveying the polyolefin pellets from the pelletizer to pellet silos via a pellet water pump. 7. The method of claim 1, comprising continuously discharging the solids stream from the flash chamber to the purge column. 8. A method for operating a polyolefin manufacturing process, comprising: polymerizing a monomer in a polymerization reactor to produce a slurry comprising polyolefin particles and diluent;separating a majority of the diluent from the polyolefin particles of the slurry in a flash chamber to produce a flash stream comprising separated diluent, and a solids stream comprising the polyolefin particles and residual diluent;purging the solids stream in a purge column to generate a discharge stream comprising the residual diluent, and to generate a fluff stream comprising the polyolefin particles, wherein the purge column receives the solids stream directly from the flash chamber;extruding the polyolefin particles of the fluff stream in an extruder to form extruded polyolefin;pelletizing the extruded polyolefin in a pelletizer to produce polyolefin pellets; and;conveying the polyolefin pellets from the pelletizer to pellet silos via a pellet water pump. 9. The method of claim 8, comprising consuming less than approximately 325 kilowatt-hours of electricity per metric ton of polyolefin pellets produced. 10. The method of claim 8, comprising consuming less than approximately 144 kilograms of steam per metric ton of polyolefin pellets produced. 11. The method of claim 8, comprising consuming less than approximately 2.8 kilograms of fuel gas per metric ton of polyolefin pellets produced. 12. The method of claim 8, comprising employing the purge column as a feed tank for the extruder and utilizing a pressure in the flash chamber to convey the polyolefin particles to the purge column. 13. The method of claim 8, comprising continuously discharging the solids stream from the flash chamber directly to the purge column via a solids discharge conduit. 14. The method of claim 8, comprising continuously discharging the slurry from the polymerization reactor. 15. The method of claim 8, comprising producing at least approximately 600 million pounds of polyolefin pellets per year. 16. A method for operating a polyolefin manufacturing process, comprising: polymerizing a monomer in a polymerization reactor to produce a slurry comprising polyolefin particles and diluent;separating a majority of the diluent from the polyolefin particles of the slurry in a flash chamber to produce a flash stream comprising separated diluent, and a solids stream comprising the polyolefin particles and residual diluent;purging the solids stream in a purge column to generate a discharge stream comprising the residual diluent, and to generate a fluff stream comprising the polyolefin particles; andfeeding the discharge stream from the purge column to a fractionation system. 17. The method of claim 16, comprising receiving the solids stream directly from the flash chamber in an extrusion/loadout system. 18. The method of claim 16, comprising extruding the polyolefin particles of the fluff stream in an extruder to form extruded polyolefin. 19. The method of claim 18, comprising pelletizing the extruded polyolefin in a pelletizer to produce polyolefin pellets. 20. The method of claim 19, comprising consuming less than approximately 445 kilowatt-hours of energy per metric ton of polyolefin pellets produced based on consumption of electricity, steam, and fuel gas.
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