US20120315202A1 - Apparatus and method for hydroconversion - Google Patents

Apparatus and method for hydroconversion Download PDF

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Publication number
US20120315202A1
US20120315202A1 US13/162,742 US201113162742A US2012315202A1 US 20120315202 A1 US20120315202 A1 US 20120315202A1 US 201113162742 A US201113162742 A US 201113162742A US 2012315202 A1 US2012315202 A1 US 2012315202A1
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United States
Prior art keywords
grid plate
plate assembly
riser
tubular
side hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
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US13/162,742
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English (en)
Inventor
Steven X. Song
Donald L. Kuehne
Abdenour Kemoun
Bruce Reynolds
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Chevron USA Inc
Chevron Corp
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Chevron Corp
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Publication date
Application filed by Chevron Corp filed Critical Chevron Corp
Priority to US13/162,742 priority Critical patent/US20120315202A1/en
Assigned to CHEVRON U.S.A. INC. reassignment CHEVRON U.S.A. INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KEMOUN, ABDENOUR, KUEHNE, DONALD L., REYNOLDS, BRUCE, SONG, STEVEN X.
Priority to PCT/US2012/040132 priority patent/WO2012170272A2/en
Priority to CN2012800153167A priority patent/CN103459559A/zh
Priority to CA2829148A priority patent/CA2829148C/en
Priority to ES12796068T priority patent/ES2806943T3/es
Priority to JP2014514505A priority patent/JP6110847B2/ja
Priority to EA201391441A priority patent/EA025812B1/ru
Priority to KR1020147000435A priority patent/KR101937431B1/ko
Priority to PT127960680T priority patent/PT2718406T/pt
Priority to BR112013020529A priority patent/BR112013020529A2/pt
Priority to PL12796068T priority patent/PL2718406T3/pl
Priority to EP12796068.0A priority patent/EP2718406B1/en
Priority to SG2013077003A priority patent/SG194505A1/en
Priority to MX2013009813A priority patent/MX2013009813A/es
Publication of US20120315202A1 publication Critical patent/US20120315202A1/en
Priority to US14/168,099 priority patent/US9314759B2/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
    • B01J8/06—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds in tube reactors; the solid particles being arranged in tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/005—Separating solid material from the gas/liquid stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/005—Separating solid material from the gas/liquid stream
    • B01J8/007—Separating solid material from the gas/liquid stream by sedimentation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/1818—Feeding of the fluidising gas
    • B01J8/1827—Feeding of the fluidising gas the fluidising gas being a reactant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
    • B01J8/22—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
    • B01J8/22—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
    • B01J8/224—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid the particles being subject to a circulatory movement
    • B01J8/226—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid the particles being subject to a circulatory movement internally, i.e. the particles rotate within the vessel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
    • B01J8/44—Fluidisation grids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
    • C10G45/02—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
    • C10G45/02—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
    • C10G45/14—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing with moving solid particles
    • C10G45/16—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing with moving solid particles suspended in the oil, e.g. slurries
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
    • C10G45/02—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
    • C10G45/22—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing with hydrogen dissolved or suspended in the oil
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G47/00—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions
    • C10G47/24—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions with moving solid particles
    • C10G47/26—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions with moving solid particles suspended in the oil, e.g. slurries
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G49/00—Treatment of hydrocarbon oils, in the presence of hydrogen or hydrogen-generating compounds, not provided for in a single one of groups C10G45/02, C10G45/32, C10G45/44, C10G45/58 or C10G47/00
    • C10G49/10—Treatment of hydrocarbon oils, in the presence of hydrogen or hydrogen-generating compounds, not provided for in a single one of groups C10G45/02, C10G45/32, C10G45/44, C10G45/58 or C10G47/00 with moving solid particles
    • C10G49/12—Treatment of hydrocarbon oils, in the presence of hydrogen or hydrogen-generating compounds, not provided for in a single one of groups C10G45/02, C10G45/32, C10G45/44, C10G45/58 or C10G47/00 with moving solid particles suspended in the oil, e.g. slurries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
    • B01J2208/00176—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles outside the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00796—Details of the reactor or of the particulate material
    • B01J2208/00893—Feeding means for the reactants
    • B01J2208/00929—Provided with baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/02—Processes carried out in the presence of solid particles; Reactors therefor with stationary particles
    • B01J2208/023—Details
    • B01J2208/024—Particulate material
    • B01J2208/025—Two or more types of catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/02—Processes carried out in the presence of solid particles; Reactors therefor with stationary particles
    • B01J2208/023—Details
    • B01J2208/024—Particulate material
    • B01J2208/026—Particulate material comprising nanocatalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00002—Chemical plants
    • B01J2219/00027—Process aspects
    • B01J2219/0004—Processes in series

Definitions

  • the invention relates to a distributor assembly in reactors for hydroconversion processes, a reactor containing the distributor assembly, and methods for hydroconversion.
  • “Heavy” hydrocarbon feed streams particularly petroleum residua, tar sand bitumen, shale oil, etc., generally contain undesirable contaminants such as sulfur, nitrogen, metals and organo-metallic compounds.
  • a hydroconversion process such as hydrotreatment to remove the undesirable components from hydrocarbon feed streams is a known method of catalytically treating heavy hydrocarbon feed to increase their commercial value.
  • Another hydroconversion process is the Fischer-Tropsch (FT) process for preparing liquid hydrocarbons from fossil fuels, especially coal, by conversion to synthesis gas, followed by conversion to liquid hydrocarbons over a FT catalyst.
  • FT Fischer-Tropsch
  • a catalytic reactor system that has been successfully used to convert coal or heavy hydrocarbon feedstock to lighter products is the ebullating bed reactor.
  • An exemplary ebullating bed reactor is employed in the H-Coal process as described in U.S. Pat. No. 4,400,263; the H-Oil process for the hydrotreating of residuum as described in U.S. Pat. No. 4,526,676; the LC-Fining process also for the hydrotreating of residuum as described in U.S. Pat. No. 4,886,644.
  • Another exemplary ebullating bed reactor system for the upgrade of heavy oil feedstock employing colloidal or molecular catalyst is described in U.S. Pat. No. 7,449,103.
  • reactor system for use in hydroconversion include an internal circulating slurry reactor or a liquid recirculating reactor as described in US Patent Publication Nos. 2007/0140927A1 and 2009/0134064A1, and a fluidized bed reactor as described in U.S. Pat. No. 4,220,518.
  • a grid plate (or distributor tray) divides the bottom section of the reactors into two zones.
  • catalyst and coke agglomerations on the grid plate can cause large variations in reactor wall temperatures requiring shut-downs and reduce the duration of runs.
  • Improved uniform distribution of gas and liquid flow through the grid plate is an important factor in optimizing reactor performance, minimizing the build-up of coke and catalyst on the grid plate and extending process run durations. There is a need for a reactor system with improved distribution design for uniform distribution of gas and liquid flow.
  • the invention relates to a reactor for the hydroconversion of hydrocarbon feedstock with a hydrogen gas at elevated temperature and pressure with the use of a catalyst
  • the reactor vessel contains a grid plate assembly comprising: a grid plate dividing the reactor into two zones, a zone above the grid plate and a zone below the grid plate; a bubble cap assembly comprising a plurality of tubular risers extending through the grid plate to transmit the hydrogen gas and hydrocarbon feedstock from the zone below the grid plate to the zone above the grid plate; each tubular riser having an upper section above the grid plate and a lower section below the grid plate, the lower section terminated with an open bottom end for ingress of the hydrogen gas and hydrocarbon feedstock, the upper section having a closed top terminated with a housing cap; the lower section of the tubular riser having at least a vertical slot extending from the open bottom end; and the lower section of the tubular riser having a least a side hole opening sufficiently sized and located such that in operation, liquid level in the zone below the grid plate is above the
  • the tubular riser is a double pipe riser, having an inner pipe and an outer pipe defining an annular opening between the inner pipe and the outer pipe as the open bottom end for ingress of the hydrogen gas and hydrocarbon feedstock, and the side hole opening is located on the outer pipe.
  • FIG. 1 is an elevated view of a reactor system employing an embodiment of the improved gas liquid distribution device, the reactor system employing an external ebullating pump.
  • FIG. 2A is a cross-sectional view of an embodiment of a bubble cap assembly.
  • FIG. 2B is a cross-sectional view of a second embodiment of a bubble cap assembly.
  • FIG. 3 is an exploded perspective view of the fragment of the reactor vessel in FIG. 1 , illustrating one embodiment of the grid plate with bubble cap risers.
  • FIG. 4 is a schematic diagram illustrating the flow distribution through a bubble cap assembly.
  • FIG. 5 is a schematic diagram of a hydroconversion system that employs a slurry phase reactor, an ebullated bed reactor having an internal ebullating pump, and a hot separator, with the improved gas liquid distributing device employed in either or both reactors.
  • the invention is directed to an improved gas liquid distributing device, e.g., a grid plate, for use in high pressure reactor vessels for the hydroconversion of hydrocarbon feedstock.
  • the improved gas liquid distributing device can be used for known reactors used in the H-Oil process, the LC-Fining process, the H-Coal process, the heavy oil upgrade process as well as others. As noted herein before, the use of these reactors is well-known in the art. It will be apparent to those skilled in the art that the embodiments described herein can have useful applications outside the scope of just ebullating bed reactors, slurry reactors, recirculating reactors, or fluidized bed reactor.
  • reactor types such as fixed bed reactors, polymerization reactors, and hydrogenation reactors, suitable for reacting liquids, liquid-solid slunies, solids and gases at elevated temperatures and pressures to treat hydrocarbon feed with hydrogen at high pressures and high temperatures, e.g. 100 to 5000 psi and 300 to 1800° F.
  • the reactor vessel contains a perforated grid plate which is circumferentially connected to the reactor inner wall.
  • the grid plate divides the bottom section of the reactor into two zones.
  • the plate can be used to support an ebullating bed, a slurry bed, or a fixed bed of solid catalyst particles in the upper zone.
  • the grid plate contains a plurality of bubble cap risers connected through the grid plate perforations for feed stream to flow through, forming an abundance of gas bubbles to pass into the upper zone, e.g., the catalyst bed or the slurry bed.
  • a number of risers extend downwardly from each grid plate hole, e.g., for about 8 to 24 inches depending on the size of the reactor vessel, below the underside of the grid plate.
  • Each riser is provided with at least a vertical slot at the bottom of the riser pipe to help with the two-phase flow through the bubble cap.
  • the slots are sized such that if a raising level of the oil surface should reach the bottom of the riser pipe, the vapor may still enter the riser via the slots.
  • the slots are sized to keep liquid level around the middle height of the slots.
  • the slots have a width ranging from 1 ⁇ 8′′ to 1′′, with a vertical length ranging from 2′′ to 12′′. In another embodiment, the vertical length ranges from 4 to 6′′.
  • the slot has a vertical length ranging from 1 ⁇ 8 to 1 ⁇ 2 of the length of the riser below the distribution plate.
  • Gas fed into the reactor system e.g., from a ring distributor or a sparger, will disengage in the bottom zone, accumulate underneath the distributor tray and form a gas pocket.
  • slurry flows into the riser through the bottom open end and lower part of the slots. Excess gas will push the liquid level down and flows into the riser though top section of the slots. For a given gas rate, a steady state liquid level is established within the height of the slots.
  • Flow distribution of gas passing through the distributor tray is sensitive to the levelness of the tray assembly. Even for a perfectly leveled tray, gas flow distribution would also be affected by varying liquid level.
  • slurry is discharged radially outward from the downcomer pipe through an internal pump at the bottom of the column.
  • the momentum of this slurry flow will push it toward the wall and cause higher slurry level close to the wall region.
  • the reactor system is operated in bubbly regime and gas rate may not be sufficient high enough to push the liquid level stay at the middle of the slots.
  • the slurry level will be high enough in the wall region to fully cover the slots on risers and leave only the slots in the middle of the column to be exposed to gas pocket.
  • the slurry level will be high enough in the wall region to fully cover the slots on risers and leave only the slots in the middle of the column to be exposed to gas pocket.
  • only bubble caps in the middle of the column will have gas flowing through, and bubble caps close to the wall will mainly have slurry and very small amount or no gas flowing through them.
  • Slots on bubble caps on one side of the column with higher liquid level can be completely submerged in liquid. Consequentially, there may be no gas flow through these bubble caps. Under high temperature operations, this will lead to coke formation in the bubble caps close to the wall, eventually cause plugging and de-fluidization in this region.
  • the riser section below the distributor plate has at least a side hole for gas flow into each riser.
  • the side hole can be of different geometric shapes, e.g., circular or elliptical.
  • the side hole is on one side of each riser.
  • the plurality of side holes are spaced equidistant around the circumference of the riser.
  • (top of) the (top-most) side hole is located from 1 to 5′′ from the distributor plate. In another embodiment, (top of) the (top-most) side hole is located at least 2′′ from the distribute plate.
  • the side hole is one embodiment is of equal size for all risers. In another embodiment, the side holes are sized differently depending on the location of the risers on the distribution plate. The side hole in one embodiment is sufficiently sized to maintain the slurry level between the hole and the slot(s). In one embodiment, the hole has a diameter ranging from 1/16 to 1 ⁇ 2 of the diameter of the riser opening (diameter of the riser tube). In another embodiment, the side hole has a diameter (or the shortest dimension for an elliptical opening) ranging from 1/16′′ to 1′′ opening, depending on the size of the equipment in operation. In one embodiment, the side hole ranges from 1 ⁇ 8 to 1 ⁇ 2′′ in opening.
  • Side holes can be sized using pressure balance models, spread sheet design tools, and computational fluid dynamic model packages known in the art such as FLUENT, taking into account factors including but not limited to riser diameter, particle size and density, flow characteristics, fluid properties, gas and liquid and/or slurry flux, etc.
  • FLUENT computational fluid dynamic model packages
  • the improved riser design with slot(s) and side hole(s) allow flexible operations with respect to gas rate, with gas flow distribution being independent of varying liquid level, allowing uniform gas distribution with tolerance to distributor tray being out-of-level.
  • gas pocket will push liquid level lower to allow extra gas flowing through the slots on the riser, while still maintaining gas flow across the section.
  • the riser section above the grid plate has a check valve section to restrict the fluid flow within.
  • the check valve comprises a ball check valve with a ball and a valve seat.
  • fluid is allowed to flow unobstructed in the rise, i.e., without moving parts such as check valves or steel balls in the riser.
  • the bubble cap riser is provided with a constriction, e.g., a venturi or throat nozzle which enhances mixing in the bubble cap riser with the constricted opening.
  • the constriction can be sized to avoid foaming formation from the high shear two-phase flow, taking into account factors such as fluid properties and operating conditions.
  • FIG. 1 illustrates a reactor vessel with an improved gas liquid distribution profile.
  • Reaction vessel 10 is fitted with an inlet conduit 12 for feeding heavy oil and a hydrogen-containing gas.
  • Outlet conduit 24 is designed to withdraw vapor and liquid through line 24 a .
  • Entry conduit 15 is for fresh catalyst feed 16
  • exit conduit 17 is for the withdrawal of spent catalyst 14 .
  • Heavy oil feedstock is introduced through line 11
  • hydrogen-containing gas is introduced through line 13 .
  • the two feeds may be combined and introduced via line 12 in the bottom of the reactor.
  • the feed passes through distributor plate 18 containing bubble caps 19 which distribute the fluids from a lower chamber 40 , which may be a plenum chamber, into bed 22 .
  • the mixture of liquid and gas flows upwardly, and the catalyst particles are thereby forced into an ebullated movement by the gas flow and the liquid flow delivered by recycle pump 20 which may be either internal or external to the reactor 10 .
  • the upward liquid flow delivered by this recycle pump is sufficient to cause the mass of catalyst particles in bed 22 to expand, thus permitting gas and liquid flow as shown by direction arrow 21 through reactor 10 .
  • the upper level of catalyst or catalyst-liquid interface is shown as 23 , and the catalytic reaction zone extends from transverse distributor plate 18 to level 23 . At steady state, few catalyst particles rise above catalyst-liquid interface 23 .
  • the volume 29 above the interface 23 is filled with liquid and entrained gas or vapor. Gas and vapor are separated from liquid in the recycle cup 30 , and a liquid with a substantially reduced gas and vapor content is recycled through downcomer 25 . Gases, vapors, and liquid product are withdrawn together through conduit 24 .
  • a plurality of vertically directed conduits 27 and 28 provides fluid communication between the reaction zone and recycle cup 30 .
  • Gas-entrained fluid moves upwardly through the conduits 27 and 28 , and upon leaving the upper ends of these conduits, part of the fluid reverses direction and flows downward to and through recycle conduit 25 to recycle pump 20 and thereby is recycled through the lower portion of reactor 10 .
  • FIG. 2B illustrates a vertical section through one embodiment of the bubble cap assembly for improved gas slurry distribution.
  • the bubble cap assembly in this embodiment is of a double pipe riser type, i.e., having an outer pipe 102 and inner pipe 103 defining an annular opening for ingress of hydrogen gas and hydrocarbon feedstock, supporting a bell cap 104 with the top 105 of the inner pipe.
  • the cap housing is bell shaped with tapered wall.
  • the bottom edge 107 of the bell cap can be notched or serrated into saw-tooth triangle.
  • the bottom edge of the outer pipe 103 terminates at 110 , in communication with the vapor space below the grid space.
  • the bottom edge 111 of the inside pipe 102 submerges under the liquid below the grid plate.
  • a plurality of spacers 112 are located between the inner and outer pipes.
  • the outer pipe 102 comprises at least a vertical slot extending up from the open bottom section of the pipe to allow for the passage of gas flowing upward through the annular opening between the inner pipe and the outer pipe.
  • FIG. 2B illustrates a vertical section through a second embodiment of the bubble cap assembly.
  • the cap housing in this embodiment is tubular in shape.
  • Riser 56 comprises a fluid outlet port 60 providing fluid communication between the lower chamber 40 and catalyst bed 22 .
  • the bubble caps 19 are fastened to the riser 56 by fastening means such as welds, washers, bolts and nuts or combination thereof in such a fashion such that the lower edge 19 b of bubble cap 19 is located above the distributor plate 18 .
  • Riser 56 comprises at least a slot 58 positioned to allow for the passage of gas under plate 18 into the riser 56 .
  • FIG. 3 is an exploded perspective view of an embodiment of the grid plate 18 and bubble cap assemblies of FIGS. 1 and 2B for improved gas slurry distribution.
  • FIG. 4 is a schematic diagram illustrating the flow distribution through the bubble cap assembly of FIG. 2 a , based on experiments in a large scale cold flow unit with 4 feet diameter column wherein water/air/sand are used to mimic oil/hydrogen/catalyst in a commercial reactor system. As shown in the diagram, uniform distribution of gas flow is achieved through pressure drop (“DP”) control across side holes on the riser. In the experiments, the cold flow unit is operated with solid concentration of 0-12%, the solid being fine silica sand having average particle size of 6 microns.
  • the grid plate has a total of 72 bubble caps with cap OD of 3′′.
  • a stainless steel ball is installed in the bubble cap to prevent back flow of catalyst slurry as taught in the prior art, which generates unwanted vibration with high velocity slurry and gas mixture flows through the throat supporting the ball.
  • the ball is removed and the throat is resized.
  • FIG. 5 illustrates an exemplary ebullated bed hydroprocessing reactor system 400 incorporating the improved grid plate design.
  • Ebullated bed hydroprocessing system 400 includes a slurry phase hydrocracking reactor 402 , a hot separator 404 , and an ebullated bed reactor 430 disposed between the slurry phase reactor 402 and the hot separator 404 .
  • a heavy oil feedstock 406 is initially blended and conditioned with a catalyst composition 408 .
  • the conditioned feedstock from the mixer 410 is pressurized by a pump 412 , passed through a pre-heater 413 , and continuously or periodically fed into the slurry phase reactor 402 together with hydrogen gas 414 through port 418 located at or near the bottom of the slurry phase reactor 402 .
  • a stirrer 420 at the bottom of the slurry phase reactor 402 helps to more evenly disperse the hydrogen 414 , schematically depicted as gas bubbles 422 , within the feedstock 406 .
  • the slurry phase reactor 402 may include a recycle channel, recycling pump, and the improved distributor grid plate (not shown) to promote more even dispersion of reactants, catalyst, and heat.
  • the colloidal or molecular catalyst within the feedstock 406 is schematically depicted as catalyst particles 424 . It will be appreciated that gas bubbles 422 and catalyst particles 424 are shown oversized so that they may be seen in the drawing. In reality, they are likely invisible to the naked eye.
  • the heavy oil feedstock 406 is catalytically upgraded in the presence of the hydrogen and colloidal or molecular catalyst within the slurry phase reactor 402 to form an upgraded feedstock 426 , which is continuously withdrawn along with residual hydrogen and from the slurry phase reactor 402 through an output port 428 located at or near the top of the slurry phase reactor 402 .
  • the upgraded feedstock 426 is optionally pressurized by pump 432 and introduced together with supplemental hydrogen 414 into the ebullated bed reactor 430 through an input port 436 located at or near the bottom of the ebullated bed reactor 430 .
  • the upgraded feedstock 426 contains also contains hydrogen and slurry catalyst or molecular (colloidal) catalyst, schematically depicted as catalyst particles 424 ′ within the ebullated bed reactor 430 and 424 ′′ in the upper section of the reactor 430 .
  • the ebullated bed reactor 430 with the improved distributor grid plate 470 also includes an output port 438 at or near the top of the ebullated bed reactor 430 through which a further hydroprocessed feedstock 440 is withdrawn.
  • the expanded catalyst zone 442 above the distributor grid plate 470 further comprises a porous supported catalyst 444 .
  • the hydroconversion is carried out with slurry catalyst or molecular catalyst only.
  • the catalyst free zone 448 is located below the distributor grid plate 470 .
  • the upper supported catalyst free zone 450 is located above the expanded catalyst zone 442 .
  • Slurry catalyst or molecular catalyst 424 is dispersed throughout the feedstock within the ebullated bed reactor 430 , including both the expanded catalyst zone 442 and the supported catalyst free zones 448 , 450 , 452 , thereby being available to promote upgrading reactions within what constitute catalyst free zones in conventional ebullated bed reactors.
  • Feedstock within the ebullated bed reactor 430 is continuously recirculated from the upper supported catalyst free zone 450 to the lower supported catalyst free zone 448 by means of a recycling channel 452 in communication with an ebullating pump 454 .
  • a recycling channel 452 At the top of the recycling channel 452 is a funnel-shaped recycle cup 456 through which feedstock is drawn from the upper supported catalyst free zone 450 .
  • the recycled feedstock is blended with fresh upgraded feedstock 426 and supplemental hydrogen gas 434 .
  • fresh supported catalyst 444 is introduced into the ebullated bed reactor 430 reactor through a catalyst input tube 458 , and spent supported catalyst 444 is withdrawn through a catalyst withdrawal tube 460 .
  • the hydroprocessed feedstock 440 withdrawn from the ebullated bed reactor 430 is introduced into the hot separator 404 , wherein the volatile fraction 405 is withdrawn from the top of hot separator 404 , and the non-volatile fraction 407 containing catalyst particles 424 ′′ is withdrawn from the bottom of hot separator 404 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
US13/162,742 2011-06-07 2011-06-17 Apparatus and method for hydroconversion Abandoned US20120315202A1 (en)

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US13/162,742 US20120315202A1 (en) 2011-06-07 2011-06-17 Apparatus and method for hydroconversion
MX2013009813A MX2013009813A (es) 2011-06-07 2012-05-31 Aparato y metodo de hidroconversion.
EA201391441A EA025812B1 (ru) 2011-06-07 2012-05-31 Устройство и способ гидроконверсии
PT127960680T PT2718406T (pt) 2011-06-07 2012-05-31 Conjunto de placa de grelha para um reator de hidroconversão e sua utilização
CA2829148A CA2829148C (en) 2011-06-07 2012-05-31 Apparatus and method for hydroconversion
ES12796068T ES2806943T3 (es) 2011-06-07 2012-05-31 Conjunto de rejilla para un reactor de hidroconversión y uso de la misma
JP2014514505A JP6110847B2 (ja) 2011-06-07 2012-05-31 水素転化用装置及び方法
PCT/US2012/040132 WO2012170272A2 (en) 2011-06-07 2012-05-31 Apparatus and method for hydroconversion
KR1020147000435A KR101937431B1 (ko) 2011-06-07 2012-05-31 수소 전환 장치 및 방법
CN2012800153167A CN103459559A (zh) 2011-06-07 2012-05-31 用于加氢转化的装置和方法
BR112013020529A BR112013020529A2 (pt) 2011-06-07 2012-05-31 aparelho e método para hidroconversão
PL12796068T PL2718406T3 (pl) 2011-06-07 2012-05-31 Układ półki rusztowej dla reaktora hydrokonwersji i jego zastosowanie
EP12796068.0A EP2718406B1 (en) 2011-06-07 2012-05-31 Grid plate assembly for a hydroconversion reactor and use thereof
SG2013077003A SG194505A1 (en) 2011-06-07 2012-05-31 Apparatus and method for hydroconversion
US14/168,099 US9314759B2 (en) 2011-06-07 2014-01-30 Apparatus and method for hydroconversion

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US13/162,742 US20120315202A1 (en) 2011-06-07 2011-06-17 Apparatus and method for hydroconversion

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US9333476B2 (en) * 2014-07-16 2016-05-10 Amec Foster Wheeler North America Corp. Grid nozzle assembly, a fluidized bed reactor with a grid nozzle assembly and methods of using a grid nozzle assembly
CN109012512A (zh) * 2018-09-14 2018-12-18 中国科学院过程工程研究所 一种内构件及包括该内构件的流化床反应器
WO2020104724A1 (en) * 2018-11-21 2020-05-28 Neste Oyj Tubular riser for a hydroprocessing ebullated bed reactor grid and method for maintenance of the reactor
CN112569874A (zh) * 2020-11-20 2021-03-30 上海竣铭化工工程设计有限公司 一种用于沸腾床反应器的气液分配器及其装配方法
IT202000009880A1 (it) * 2020-05-05 2021-11-05 Luigi Patron Reattori upflow di idrotrattamento ad alta superficie di contatto idrogeno-liquido idrocarburico a migliorata capacità di idrogenazione

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CN106732190A (zh) * 2015-11-25 2017-05-31 中石化洛阳工程有限公司 一种气液分配器
CN106076207B (zh) * 2016-08-19 2019-04-26 兰州兰石集团有限公司 抽吸溢流型气液分配器
CN109985574B (zh) * 2017-12-29 2021-08-31 中国石油化工股份有限公司 顶部设置减冲盘的加氢反应器
CN109261085B (zh) * 2018-11-16 2019-07-12 重庆华峰化工有限公司 己二胺合成系统
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CN109012512A (zh) * 2018-09-14 2018-12-18 中国科学院过程工程研究所 一种内构件及包括该内构件的流化床反应器
WO2020104724A1 (en) * 2018-11-21 2020-05-28 Neste Oyj Tubular riser for a hydroprocessing ebullated bed reactor grid and method for maintenance of the reactor
IT202000009880A1 (it) * 2020-05-05 2021-11-05 Luigi Patron Reattori upflow di idrotrattamento ad alta superficie di contatto idrogeno-liquido idrocarburico a migliorata capacità di idrogenazione
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CN112569874A (zh) * 2020-11-20 2021-03-30 上海竣铭化工工程设计有限公司 一种用于沸腾床反应器的气液分配器及其装配方法

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US20140147352A1 (en) 2014-05-29
EP2718406A2 (en) 2014-04-16
CA2829148C (en) 2021-04-27
US9314759B2 (en) 2016-04-19
WO2012170272A3 (en) 2013-01-31
EP2718406B1 (en) 2020-04-22
PT2718406T (pt) 2020-07-23
ES2806943T3 (es) 2021-02-19
EA201391441A1 (ru) 2014-03-31
MX2013009813A (es) 2013-10-07
CN103459559A (zh) 2013-12-18
CA2829148A1 (en) 2012-12-13
BR112013020529A2 (pt) 2016-10-25
SG194505A1 (en) 2013-12-30
KR20140045496A (ko) 2014-04-16
EP2718406A4 (en) 2015-01-21
JP6110847B2 (ja) 2017-04-05
PL2718406T3 (pl) 2020-11-02
EA025812B1 (ru) 2017-01-30
KR101937431B1 (ko) 2019-01-14
JP2014520185A (ja) 2014-08-21

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