# US 11,298,670 B2 · Compact quench zone reactor internals > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,670 B2 - Document ID: US11298670B2 - Status: Granted - Kind: B2 - Application number: 17/148,698 - Filed: 2021-01-14 - Published: 2021-10-28 - Granted: 2022-04-12 - Earliest claimed: 2020-04-24 - Assignees: Uop LLC - Applicants: Uop LLC - Inventors: Zhanping Xu; Pengfei Chen; John Christian Maley; Shree Prakash Pathak; Rebecca Mudrock; Nicholas W. Bridge - Web page: https://patentgrep.com/patent/US11298670B2 ## CPC - B01J 8/0492: {Feeding reactive fluids (for solid material, see B01J8/0015)} - B01J 8/0278: {Feeding reactive fluids (for solid material B01J8/0015)} - B01J 2208/00849: outside the bed, e.g. baffles - B01J 2208/00929: Provided with baffles - B01J 2208/00938: Flow distribution elements - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS ## Abstract Hydroprocessing reactor internals height reduction is achieved by placing a mixing chamber above the collection tray. The mixing chamber has spillways on the top (top spillways) and the side of the mixing chamber (side spillways) for fluid entry. The design of the spillways has a significant impact on pressure drop. The pressure drop is reduced by having wide shallow spillways rather than narrow and deep spillways without impacting mixing performance. With both side and top spillways, the height of the mixing chamber can be reduced significantly with minimal impact on fluid mixing and pressure drop. ## Claims ### Claim 1 A device for the mixing and distribution of fluid between catalyst beds comprising: a collection tray comprising a central opening, the collection tray in fluid communication with a bottom of an upper catalyst bed; a mixing chamber above the collection tray, the mixing chamber positioned around the central opening, the mixing chamber having an outer wall located at a position inward of a reactor wall and a top plate attached to the outer wall, the outer wall having at least one side spillway to allow fluid to pass therethrough, and the top plate having at least one top spillway to allow fluid to pass therethrough, the top plate in fluid communication with the bottom of the upper catalyst bed; a ring quench distributor comprising an injector for injecting quench fluid into a space above the collection tray between the reactor wall and the outer wall; a rough liquid distribution tray comprising a central pan in fluid communication with the central opening of the collection tray; and a vapor-liquid distribution tray in fluid communication with the rough liquid distribution tray and a top of a lower catalyst bed. ### Claim 2 (depends on 1) The device of claim 1 wherein the at least one top spillway is aligned with the at least one side spillway. ### Claim 3 (depends on 1) The device of claim 1 wherein there are at least four top spillways and at least four side spillways. ### Claim 4 (depends on 3) The device of claim 3 wherein the at least four top spillways are aligned with the at least four side spillways and wherein the at least four top spillways and the at least four side spillways are equally spaced around the mixing chamber. ### Claim 5 (depends on 1) The device of claim 1 further comprising a directional baffle at the at least one side spillway. ### Claim 6 (depends on 5) The device of claim 5 wherein the directional baffle extends inwardly into the mixing chamber. ### Claim 7 (depends on 5) The device of claim 5 wherein the directional baffle extends outwardly into the space between the reactor wall and the outer wall. ### Claim 8 (depends on 5) The device of claim 5 wherein the directional baffle forms an angle with respect to a tangent of the outer wall of less than 30°. ### Claim 9 (depends on 1) The device of claim 1 wherein the outer wall has a height and wherein the at least one side spillway has a height equal to the height of the outer wall. ### Claim 10 (depends on 1) The device of claim 1 wherein a floor of the collection tray outside the mixing chamber forms an angle with respect to a floor of the collection tray inside the mixing chamber. ### Claim 11 (depends on 1) The device of claim 1 wherein the injector is positioned above the top plate of the mixing chamber. ### Claim 12 (depends on 1) The device of claim 1 wherein the mixing chamber has a plurality of inner vertical support plates oriented tangentially to one or more concentric circles to support the top plate and to promote rotational fluid flow inside the mixing chamber. ### Claim 13 A device for the mixing and distribution of fluid between catalyst beds comprising: a collection tray comprising a central opening, the collection tray in fluid communication with a bottom of an upper catalyst bed; a mixing chamber above the collection tray, the mixing chamber positioned around the central opening, the mixing chamber having an outer wall located at a position inward of a reactor wall and a top plate attached to the outer wall, the outer wall having at least two side spillways to allow fluid to pass therethrough, and the top plate having at least two top spillways to allow fluid to pass therethrough, the at least two top spillways being aligned with the at least two side spillways, and wherein the at least two top spillways and the at least two side spillways being equally spaced around the mixing chamber, the top plate in fluid communication with the bottom of the upper catalyst bed; a ring quench distributor comprising an injector for injecting quench fluid into a space above the collection tray between the reactor wall and the outer wall; a rough liquid distribution tray comprising a central pan in fluid communication with the central opening of the collection tray; and a vapor-liquid distribution tray in fluid communication with the rough liquid distribution tray and a top of a lower catalyst bed. ### Claim 14 (depends on 13) The device of claim 13 wherein there are at least four top spillways and at least four side spillways. ### Claim 15 (depends on 13) The device of claim 13 further comprising a directional baffle at the at least one side spillway. ### Claim 16 (depends on 15) The device of claim 15 wherein the directional baffle extends inwardly into the mixing chamber or wherein the directional baffle extends outwardly into the space between the reactor wall and the outer wall; and wherein the directional baffle forms an angle with respect to a tangent of the outer wall of less than 30°. ### Claim 17 (depends on 13) The device of claim 13 wherein the outer wall has a height and wherein the at least two side spillways have a height equal to the height of the outer wall. ### Claim 18 (depends on 13) The device of claim 13 wherein a floor of the collection tray outside the mixing chamber forms an angle with respect to a floor of the collection tray inside the mixing chamber. ### Claim 19 (depends on 13) The device of claim 13 wherein the injector is positioned above the top plate of the mixing chamber. ### Claim 20 (depends on 13) The device of claim 13 wherein the mixing chamber has a plurality of inner vertical support plates oriented tangentially to one or more concentric circles to support the top plate and to promote rotational fluid flow inside the mixing chamber.