Classifications

• • 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
  • B01J4/00—Feed or outlet devices; Feed or outlet control devices
  • B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
  • B01J4/002—Nozzle-type elements
• • 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
  • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J19/26—Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
• • 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
  • B01J2208/00477—Controlling the temperature by thermal insulation means
  • B01J2208/00486—Vacuum spaces
• • 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
  • B01J2208/00477—Controlling the temperature by thermal insulation means
  • B01J2208/00495—Controlling the temperature by thermal insulation means using insulating materials or refractories
• • 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

Definitions

• the invention relates to a feed nozzle for co-currently introducing a gas and a liquid into a reactor vessel, particularly for introducing atomizing vapor and pyrolysis oil feed into a catalytic cracking reactor.
• Such a feed nozzle may include an inner tube defining a steam conduit and an outer tube arranged around the inner tube, wherein the outer surface of the inner tube and the inner surface of the outer tube define an annular hydrocarbon conduit, and wherein each of the tubes have an inlet end and an opposite outlet end.
• Heat sensitive feeds encompass both petroleum and non-petroleum feeds which may be unstable at operating temperatures of many refining/chemical processes. The instability may cause the heat sensitive feeds to polymerize or degrade in the process equipment. Examples of such feeds may include, but are not limited to, products produced from the pyrolysis of biomass, plastics, wastes, and hydrocarbons that contain low boiling components that are volatile near ambient conditions.
• Pyrolysis oils and/or heat sensitive feeds tend to degrade, coke, foul equipment or prematurely vaporize as the feedstock temperature increases when being injected into the FCC unit.
• the injection may occur in the riser and/or the fluidized catalyst bed.
• Prior attempts to co-process pyrolysis oil streams and hydrocarbon streams have involved deoxygenation of the pyrolysis oil. Such an approach adds unit operations, along with added capital costs, to the upgrading process. Feed lines that contain mixtures of a hydrocarbon stream and a pyrolysis oil stream are generally prone to clogging due to the presence of the pyrolysis oil stream in the feed lines.
• a feed nozzle assembly for co-currently introducing vapor and liquid into a reactor vessel which feed nozzle assembly includes: (a) an annular enclosure surrounding an annular feed conduit, (b) an atomizing vapor conduit surrounded by the annular feed conduit, wherein the annular feed conduit comprises a first portion comprising a first outlet and a second portion comprising a second outlet opposite the first outlet, the first outlet fluidly connecting the first portion and the second portion.
• the second outlet of the annular feed conduit traverses the annular enclosure.
• the atomizing vapor conduit has an outlet end comprising one or more openings disposed upstream of the first outlet of the annular feed conduit.
• Figure 5 shows the maximum difference between a wall temperature and the feedstock temperature with the feed nozzle assembly incorporating insulating gaseous material and inserted into a vessel;
• Methods and fuel processing apparatuses for feeding a liquid and vaporous feed to a process is provided herein.
• the process involves upgrading a heat sensitive stream, such as a pyrolysis oil product stream, are provided herein.
• a heat sensitive stream such as a pyrolysis oil product stream
• upgrading refers to conversion of relatively high boiling point hydrocarbons to lower boiling point hydrocarbons.
• feedstocks may be fossil or non-fossil feedstocks. Upgrading processes generally render a heat sensitive stream suitable for use as a transportation fuel and other valuable products, like olefins.
• a heat sensitive stream is catalytically cracked in a reaction zone in the presence of a particulate cracking catalyst.
• the reaction zone is an area or space where particulate cracking catalyst is comingled along with the heat sensitive stream.
• Catalytic cracking is conducted at temperatures in excess of 100 °C.
• heat sensitive streams may polymerize at temperatures in excess of 25 °C and form deposits within the apparatuses. Deposit formation is of concern in the feed lines that lead to the reaction/riser zone.
• the pyrolysis oil stream is insulated in the feed nozzle by a heat shield.
• the heat shield surrounds the pyrolysis oil stream which will help maintain the temperature of the pyrolysis oil stream at a temperature of less than or equal to about 160° C substantially up to introduction into the reaction zone.
• a temperature rise in the pyrolysis oil stream above about 160° C may result in deposit formation due to polymerization within the pyrolysis oil stream.
• the feed nozzle may be used in a variety of reactor vessels and in a variety of operating modes such as, but not limited to, upflow, downflow, riser or fluidized bed. In some embodiments, the feed nozzle may be used for numerous processes wherein it is desired to have the feed insulated from external sources.
• the feed nozzle assembly 100 includes an annular enclosure 102 surrounding an annular feed conduit 104.
• the annular feed conduit 104 has a first portion 130 and a second portion 114.
• the length of the second portion 114 is less than the length of the first portion 130.
• the inner diameter of the second portion 114 may be less than the inner diameter of the first portion 130.
• the first portion 130 has an inlet end 106 and an outlet end 108.
• the outlet end 108 has an opening 110 which fluidly connects the first portion 130 to the second portion 114.
• the second portion 114 has an outlet 112 opposite the opening 110.
• the outlet 112 traverses the annular enclosure 102.
• the first portion 130 of the annular feed conduit 104 surrounds an atomizing vapor conduit 116.
• the atomizing vapor conduit 116 has an inlet end 118 and an outlet end 120.
• the outlet end 120 includes one or more openings 122 from which atomizing vapor exits.
• the one or more openings 122 are disposed upstream the opening 110 creating an atomization zone in the outlet end 108 of the annular feed conduit 104 wherein the atomizing vapor atomizes the feed.
• the length between the one or more openings 122 and the opening 110 can be determined by one skilled in the art.
• the inner diameter of the annular enclosure 102 is greater than the outer diameter of the first portion 130 of the annular feed conduit 104.
• the inner diameter of the annular enclosure 102 is greater than the outer diameter of the second portion 114 of the annular feed conduit 104.
• the inner diameter of the first portion 130 of the annular feed conduit 104 is greater than the outer diameter of the atomizing vapor conduit 116.
• the inner diameter of the second portion 114 is less than or equal to the inner diameter of the atomizing vapor conduit 116.
• the inner diameter of the second portion 114 is greater than the inner diameter of the atomizing vapor conduit 116.
• the annular enclosure 102 insulates the annular feed conduit 104.
• the inner diameter of the annular enclosure 102, the outer diameter of the of the annular enclosure 102 and the thickness of the pipe wall can be determined by one skilled in the art.
• the annular enclosure 102 may be made of materials commonly found in the refining/chemical processing fields, such as, but not limited to, stainless steel or other types of steels.
• the annular enclosure 102 is hollow and may be filled with one or more insulating materials.
• the insulating material may have a thermal conductivity ranging from 0.0017 to 1.73 watt/(m-°K), from 0.017 to 0.865 watt/(m-°K) or from 0.173 to 0.519 watt/(m-°K).
• the insulating material may be gaseous, such as but not limited to, air or an inert gas.
• the gaseous insulating material may have a thermal conductivity ranging from 0.0173 to 0.432 watt/(m-°K), from 0.0865 to 0.259 watt/(m-°K) or from 0.13 to 0.173 watt/(m-°K).
• the air or inert gas in the annular enclosure 102 is removed, creating a vacuum, thereby further reducing the thermal conductivity.
• the annular enclosure 102 may be filled with one or more solid insulating materials.
• the solid insulating material may have a thermal conductivity ranging from 0.0017 to 1.73 watt/(m-°K), from 0.017 to 1.3 watt/(m-°K) or from 0. 173 to 0.865 watt/(m-°K).
• the insulating materials may be selected from, but not limited to, granulate, heater/boiler insulation, home insulation, etc.
• thermal conductivity materials may provide at least air-equivalent heat shielding while keeping the equipment design to a smaller scale.
• thermal conductivity materials come in a variety of forms (e.g. blanketing, rope, granulate) and can conform to a wide range of annular conduits 102. Installing such materials in an air-containing cavity, gap or annular space will displace volume taken up by air and as a result, limit the pressure build within the equipment as temperatures increase during operation.
• the annular feed conduit 104 may be made of materials commonly found in the refining/chemical processing fields which are resistant to acidic liquids, such as but not limited to, stainless steel or other types of steels.
• the inner diameter of the first portion 130 and the second portion of the annular feed conduit 104, the outer diameter of the first portion 130 and the second portion of the annular feed conduit 104 and the thickness of the pipe wall can be determined by one skilled in the art.
• the atomizing vapor conduit 116 may be made of materials commonly found the refining/chemical processing fields which are resistant to acidic liquids, such as but not limited to, stainless steel or other types of steels.
• the inner diameter of atomizing vapor conduit 116, the outer diameter of the of atomizing vapor conduit 116 and the thickness of the pipe wall can be determined by one skilled in the art.
• the number and spacing of the openings 122 can be determined by one skilled in the art.
• the feed nozzle assembly 100 may be inserted into a vessel 300 having a side wall 301.
• the vessel 300 may be a reactor or a riser.
• the side wall 301 thickness may be determined by one skilled in the art. For clarity, the same reference numbers have been used across the Figures to denote the same terms.
• the feed nozzle assembly 100 may be inserted into any surface of the vessel 300, i.e., top. bottom or side.
• the feed nozzle assembly 100 is inserted into a nozzle sleeve 202 having a refractory shroud 204 around it.
• the refractory shroud 204 typically is embedded within the vessel 300 and may or may not extend beyond the side wall 301.
• the feed nozzle assembly 100 may be inserted into the vessel 300 without a nozzle sleeve 202.
• the feed nozzle assembly 100 may be inserted into any suitable nozzle or suitable opening within the vessel 300.
• the nozzle sleeve 202 penetrates the side wall 301 into a reaction zone 302.
• a channel 214 traverses the nozzle sleeve 202 and the shroud refractory 204.
• the channel 214 provides a fluid conduit from the outlet 112 of the second portion 114 from an inlet 216 to an outlet 218 of the channel 214.
• the outlet 218 is opposite the inlet 216.
• the outlet 218 of the channel 214 is located within the reactor zone 302.
• the nozzle sleeve 202 is composed of a metal, which can be stainless steel and the shroud refractory 204 can be composed of refractory.
• the composition and size of the nozzle sleeve 202 and refractory shrouding 204 can be determined by one skilled in the art.
• atomizing vapor is passed through the atomizing vapor conduit 116 from the inlet end 118 along the atomizing vapor conduit 116 and exits the atomizing vapor conduit 116 through the openings 122.
• Pyrolysis oil is supplied to the inlet end 106 of the annular feed conduit 104 and passes along the annular feed conduit 104.
• the atomizing vapor exits the one or more openings 122 mixing with the pyrolysis oil in the annular feed conduit 104 resulting in fine jets dispersing the pyrolysis oil.
• the mixture of atomizing vapor and pyrolysis oil passes through the opening 110 along the second portion 114 and exits through the outlet 112 of the annular feed conduit 104.
• the one or more openings 122 are adapted to substantially uniformly atomize the mixture of atomizing vapor and pyrolysis oil prior to entering the opening 110.
• the outlet 112 is aligned with the channel 214 to exit into the vessel 300 via the outlet 218.
• the vessel may be, but is not limited to, a fluid catalytic cracking reactor.
• the annular enclosure 102 was filled with either air or granulate material having the thermal conductivities as shown in Table 1 :
• Example 1 finite element analysis was conducted to predict the thermal gradients of specific feed nozzle internal surfaces under various process operating conditions. Of most interest were those temperatures of the internal surfaces of the annular feed conduit 104 which would come in contact with the above-described heat sensitive feedstocks. Shielding the internal surfaces of the annular feed conduit 104 from reaching excessive temperatures may mitigate potential coking and fouling of the heat sensitive feedstock within the feed nozzle assembly 100. In other words, the heat shielding provided by the annular enclosure 102 minimizes the difference between the heat sensitive feedstock inlet temperature at the inlet end 106 and the surface temperatures of internal contact surfaces, such as the annular feed conduit 104, the outlet end 108, the opening 110, the second portion 114 and the outlet 112.
• Example 2 finite element analysis was again conducted to predict the thermal gradients of specific feed nozzle internal surfaces under various process operating conditions.
• the feed nozzle assembly 100 was modeled to be inserted into a metal sleeve 202 having a shroud refractory 204 which penetrates into the reactor zone 302.
• the annular enclosure 102 was modeled to be filled with granulate material having the properties shown in Table 1.
• the nozzle sleeve 202 and shroud refractory 204 provide some heat shielding for the feed nozzle 100, yet the feed nozzle 100 exposure to heat remains severe.
• the temperature of the heat sensitive feedstock leaving opening 110 was compared to predicted wall temperatures distributed along second portion 114 to outlet 1 12.
• the maximum difference between any predicted wall temperature and the heat sensitive feedstock temperature entering opening 110 w as approximately 17° C (see Figure 4) for channel having a length up to about 2.25 inches. This low temperature increase maintains the heat sensitive feedstock at a temperature of less than or equal to about 160° C up to introduction into the reactor zone 302.
• Example 3 the finite element analysis of Example 2 w as again conducted to predict the thermal gradients of specific feed nozzle internal surfaces under various process operating conditions but changing the contents of the annular conduit to be air with the conductivities as shown in Table 1.
• the maximum difference between any predicted w all temperature and the heat sensitive feedstock temperature entering opening 110 was approximately 39° C (See Figure 5). Such a low temperature increase will enable maintenance of the heat sensitive feedstock at a temperature of less than or equal to about 160° C substantially up to introduction into the reaction zone 302.
• Example 4 a prototype feed nozzle 100 as shown in Figure 1 was fabricated and tested for its heat shielding capability using air to simulate the atomizing vapor and water to simulate the heat-sensitive feedstock.
• the annular enclosure 102 was filled with granulate material having the properties shown in Table 1.
• a heating blanket was placed on the outside of the annular enclosure 102. such that the annular enclosure 102 outer surface temperature of 427° C was established, representing the temperature of the channel outlet 112 ( Figure 2) resulting from a reactor zone 302 temperature of 703° C and the outlet 218.
• the blanketing was also configured to favor the underside of the nozzle, such as would be found when placed in a vessel 300 as shown in Figure 2.
• the proty pe testing indicates that maintenance of the heat sensitive feedstock at a temperature of less than or equal to about 160° C substantially up to introduction into the reaction zone 302 is achievable.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
• Nozzles (AREA)
• Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2024
  • 2024-02-05 AR ARP240100267A patent/AR131778A1/es unknown
  • 2024-02-06 JP JP2025545991A patent/JP2026504535A/ja active Pending
  • 2024-02-06 WO PCT/US2024/014532 patent/WO2024167873A1/en not_active Ceased
  • 2024-02-06 CN CN202480011378.3A patent/CN120659661A/zh active Pending
  • 2024-02-06 EP EP24711706.2A patent/EP4662000A1/de active Pending

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