초록 ▼

A combined oil filter and magnet apparatus of the invention generally is comprised of an oil filter and a removable and reusable magnet unit attached to the oil filter. The removable and reusable magnet unit attracts and retains ferro-magnetic particles present in the oil flowing inside the oil filt

A combined oil filter and magnet apparatus of the invention generally is comprised of an oil filter and a removable and reusable magnet unit attached to the oil filter. The removable and reusable magnet unit attracts and retains ferro-magnetic particles present in the oil flowing inside the oil filter, thereby separating those particles from the flowing oil. Inside the oil filter, an oil flow director is provided to direct oil flow to the vicinity of the removable and reusable magnet unit. With a first embodiment of the invention, the removable and reusable magnet unit is partially received in a centrally located filtered oil flow space inside the oil filter. With a second embodiment of the invention, the removable and reusable magnet unit is completely external to the interior of the oil filter.

대표청구항 ▼

A combined oil filter and magnet apparatus of the invention generally is comprised of an oil filter and a removable and reusable magnet unit attached to the oil filter. The removable and reusable magnet unit attracts and retains ferro-magnetic particles present in the oil flowing inside the oil filt

A combined oil filter and magnet apparatus of the invention generally is comprised of an oil filter and a removable and reusable magnet unit attached to the oil filter. The removable and reusable magnet unit attracts and retains ferro-magnetic particles present in the oil flowing inside the oil filter, thereby separating those particles from the flowing oil. Inside the oil filter, an oil flow director is provided to direct oil flow to the vicinity of the removable and reusable magnet unit. With a first embodiment of the invention, the removable and reusable magnet unit is partially received in a centrally located filtered oil flow space inside the oil filter. With a second embodiment of the invention, the removable and reusable magnet unit is completely external to the interior of the oil filter. tock is fed to the first stage preheater at a pressure ranging from 150 to 250 psig and at a temperature ranging from 140° C.-300° C. 9. The process of claim 1, wherein the feedstock in the first stage preheater is heated to an exit temperature of at least 400° C. 10. The process of claim 9, wherein the feedstock in the first stage preheater is heated to a temperature ranging from 400 to 520° C. 11. The process of claim 9, wherein the gas-liquid weight ratio ranges from 60/40 to 98/2. 12. The process of claim 9, wherein the first stage preheater comprises tubes, and the pressure within said tubes ranges from 50 psig to 300 psig. 13. The process of claim 9, wherein the first stage preheater comprises tubes, and the pressure within said tubes ranges from 60 psig to 180 psig. 14. The process of claim 1, wherein dilution gas is added to the feedstock in the first stage preheater. 15. The process of claim 14, wherein the dilution gas comprises dilution steam, and the temperature of the dilution steam added is below the temperature of the feedstock measured at the dilution steam juncture with the crude oil feedstock in the preheater tubes. 16. The process of claim 14, wherein the dilution gas comprises vaporized naphtha, refinery off gases, or a mixture thereof. 17. The process of claim 14, wherein the first stage preheater comprises tubes, and the amount of dilution gas added to the feedstock in said tubes is up to 0.5 lbs. of gas per lb. of feedstock. 18. The process of claim 17, wherein the dilution gas comprises dilution steam, and is added to the feedstock in the tubes of the first stage preheater in an amount of up to 0.3 lbs. of steam per lb. of feedstock. 19. The process of claim 1, wherein superheated steam is combined with the removed gas prior to entry into the second stage preheater. 20. The process of claim 19, wherein the temperature of the superheated steam ranges from 450° C. to 600° C. 21. The process of claim 1, wherein the first stage preheater comprises tubes, and the feedstock has a linear velocity through said tubes in the convection section ranging from 1.1-2.2 m/s. 22. The process of claim 21, wherein the feedstock linear velocity through the tubes of the first stage preheater in a convection section ranges from 1.9-2.1 m/s. 23. The process of claim 1, wherein said olefins comprise ethylene in an amount ranging from 15 to 30 wt. %, based on the weight of the vaporized feedstock. 24. The process of claim 1, wherein said feedstock is crude oil. 25. The process of claim 1, wherein said feedstock is long residue. 26. The process of claim 1, wherein water is added to the feedstock prior to entry into or within the first stage preheater tubes to increase the linear velocity of the feedstock. 27. The process of claim 26, wherein the amount of water added to the feedstock is 1 moles or less, based on the moles of the feedstock. 28. The process of claim 1, wherein the convection zone is decoked on a schedule no more frequent than the frequency for decoking the radiant zone of the pyrolysis furnace. 29. A process for pyrolyzing a crude oil or crude oil fraction containing pitch feedstock comprising feeding said feedstock to a first stage preheater within a convection zone of an olefins pyrolysis furnace, heating said feedstock to a temperature at which non-coking fractions and a portion of coking fractions are fully evaporated to a gas, while the remaining portion of coking fractions are maintained in a liquid phase, wherein the gas/liquid weight ratio of said feedstock in the first stage preheater is within a range of 60/40-98/2, withdrawing the gas/liquid mixture from the first stage preheater and feeding the gas/liquid mixture to a vapor-liquid separator, separating the gas from said gas/liquid mixture in the vapor-liquid separator and removing said gas from the vapor-liquid separator, feeding said removed gas to a second stage preheater in the convection zone, heating said gas in the second stage preheater, a