# US 11,029,096 B2 · Heat exchanger for quenching reaction gas > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,096 B2 - Document ID: US11029096B2 - Status: Granted - Kind: B2 - Application number: 16/316,301 - Filed: 2017-07-05 - Published: 2020-04-02 - Granted: 2021-06-08 - Earliest claimed: 2016-07-08 - Assignees: Technip France - Applicants: Technip France - Inventors: Esmaeil Mahmoudi Namarvar; Peter Oud - Web page: https://patentgrep.com/patent/US11029096B2 ## CPC - C10G 9/002: {Cooling of cracked gases} - F28D 7/106: {consisting of two coaxial conduits or modules of two coaxial conduits} - F16L 53/70: Cooling of pipes or pipe systems - F16L 59/143: {Pre-insulated pipes} - F28F 1/003: {Multiple wall conduits, e.g. for leak detection (leak-detection in metal cooled nuclear reactor steam generators F22B1/066)} - F28F 1/006: {with variable shape, e.g. with modified tube ends, with different geometrical features (F28F1/025, F28F1/06, F28F1/08, F28F9/16, F28F9/18 take precedence)} - F28F 9/0246: {Arrangements for connecting header boxes with flow lines} - F28F 9/0265: {by using guiding means or impingement means inside the header box} - F28F 9/182: {the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments} - F28F 21/081: {Heat exchange elements made from metals or metal alloys} - F16L 9/18: Double-walled pipes; Multi-channel pipes or pipe assemblies - F16L 2201/30: Detecting leaks - F28D 2021/0075: {for syngas or cracked gas cooling systems} - F28F 9/02: Header boxes; End plates - F28F 2265/26: for allowing differential expansion between elements - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) ## Abstract Heat exchanger for quenching reaction gas comprising—a coolable double-wall tube including an inner tubular wall and an outer tubular wall, wherein said inner tubular wall is configured to convey said reaction gas to be quenched, and wherein a space defined by said inner tubular wall and said outer tubular wall is configured to convey a coolant; —a tubular connection member having a bifurcating longitudinal cross-section comprising an exterior wall section and an interior wall section defining an intermediate space filled with refractory filler material, wherein a converging end of said connection member is arranged to be in connection with an uncoolable reaction gas conveying pipe, wherein said exterior wall section is connected with said outer tubular wall of said coolable double-wall tube, wherein an axial gap is left between said interior wall section and said inner tubular wall of said coolable double-wall tube. ## Claims ### Claim 1 Heat exchanger for quenching reaction gas comprising: a coolable double-wall tube including an inner tubular wall and an outer tubular wall, wherein said inner tubular wall is configured to convey said reaction gas to be quenched, and wherein a space defined by said inner tubular wall and said outer tubular wall is configured to convey a coolant; a tubular connection member having a bifurcating longitudinal cross-section comprising an exterior wall section and an interior wall section defining an intermediate space filled with refractory filler material, wherein a converging end of said connection member is arranged to be in connection with an uncoolable reaction gas conveying pipe, wherein said exterior wall section is connected with said outer tubular wall of said coolable double-wall tube, wherein an axial gap is left between said interior wall section and said inner tubular wall of said coolable double-wall tube; and a sealing member configured to seal said axial gap between said interior wall section and said inner tubular wall of said coolable double-wall tube; wherein an edge of said inner tubular wall engaging said sealing member comprises an at least partly beveled edge including a bevel engaging said sealing member. ### Claim 2 (depends on 1) Heat exchanger according to claim 1, wherein said sealing member comprises slidingly overlapping thinned ends. ### Claim 3 (depends on 1) Heat exchanger according to claim 1, wherein said sealing member comprises a spring-like element arranged to press said sealing member against said at least partly beveled edge of said inner tubular wall. ### Claim 4 (depends on 1) Heat exchanger according to claim 1, wherein said edge of said inner tubular wall is beveled radially inwardly. ### Claim 5 (depends on 1) Heat exchanger according to claim 1, wherein an edge of said interior wall section engaging said sealing member comprises a partly beveled edge including a bevel radially spaced apart from, and substantially in parallel with, said at least partly beveled edge of said end side of said inner tubular wall. ### Claim 6 (depends on 5) Heat exchanger according to claim 5, wherein said sealing member engages an unbeveled part of said partly beveled edge of said interior wall section of said tubular connection member. ### Claim 7 (depends on 1) Heat exchanger according to claim 1, wherein said refractory filler material comprises at least two sectors of refractory filler material separated by at least two slits extending in an axial and a radial direction. ### Claim 8 (depends on 7) Heat exchanger according to claim 7, wherein said at least two slits comprise a layer of ceramic paper. ### Claim 9 (depends on 1) Heat exchanger according to claim 1, wherein a layer of ceramic paper is comprised between said refractory filler material and said exterior wall section of said tubular connection member. ### Claim 10 (depends on 1) Heat exchanger according to claim 1, wherein said refractory filler material comprises in an axial direction at least two layers of refractory filler material with different heat conductivity, wherein the heat conductivity of said at least two layers of refractory filler material decreases towards said coolable double-wall tube. ### Claim 11 (depends on 1) Heat exchanger according to claim 1, wherein said outer tubular wall of said coolable double-wall tube is at least partly made of manganese and/or molybdene. ### Claim 12 (depends on 1) Heat exchanger according to claim 1, wherein said coolable double-wall tube comprises a coolant inlet nozzle arranged to let a coolant into said space defined by said inner tubular wall and said outer tubular wall of said coolable double-wall tube at a bottom level of said coolable double-wall tube close to said tubular connection member. ### Claim 13 (depends on 12) Heat exchanger according to claim 12, wherein said coolant inlet nozzle is included in a coolant box extending between said outer tubular wall of said coolable double-wall tube and said exterior wall section of said tubular connection member and surrounding said inner tubular wall of said coolable double-wall tube. ### Claim 14 (depends on 1) Heat exchanger according to claim 1, comprising at least one baffle arranged to guide a flow of coolant in said space defined by said inner tubular wall and said outer tubular wall of said coolable double-wall tube. ### Claim 15 (depends on 14) Heat exchanger according to claim 14, wherein said at least one baffle is fixedly connected with an outside of said inner tubular wall of said coolable double-wall tube. ### Claim 16 (depends on 1) Heat exchanger according to claim 1, wherein said at least one baffle extends into a direction of said coolant inlet nozzle. ### Claim 17 (depends on 16) Heat exchanger according to claim 16, wherein said at least one baffle is off-centered with respect to a central axis of said coolant inlet nozzle. ### Claim 18 (depends on 14) Heat exchanger according to claim 14, comprising at least two mutually transversally positioned baffles. ### Claim 19 Heat exchanger for quenching reaction gas comprising: a coolable double-wall tube including an inner tubular wall and an outer tubular wall, wherein said inner tubular wall is configured to convey said reaction gas to be quenched, and wherein a space defined by said inner tubular wall and said outer tubular wall is configured to convey a coolant; a tubular connection member having a bifurcating longitudinal cross-section comprising an exterior wall section and an interior wall section defining an intermediate space filled with refractory filler material, wherein a converging end of said connection member is arranged to be in connection with an uncoolable reaction gas conveying pipe, wherein said exterior wall section is connected with said outer tubular wall of said coolable double-wall tube, wherein an axial gap is left between said interior wall section and said inner tubular wall of said coolable double-wall tube; and a sealing member configured to seal said axial gap between said interior wall section and said inner tubular wall of said coolable double-wall tube; wherein said refractory filler material comprises at least two sectors of refractory filler material separated by at least two slits extending in an axial and a radial direction. ### Claim 20 (depends on 19) Heat exchanger according to claim 19, wherein said at least two slits comprise a layer of ceramic paper. ### Claim 21 (depends on 19) Heat exchanger according to claim 19, wherein a layer of ceramic paper is comprised between said refractory filler material and said exterior wall section of said tubular connection member. ### Claim 22 (depends on 19) Heat exchanger according to claim 19, wherein said refractory filler material comprises in an axial direction at least two layers of refractory filler material with different heat conductivity, wherein the heat conductivity of said at least two layers of refractory filler material decreases towards said coolable double-wall tube. ### Claim 23 Heat exchanger for quenching reaction gas comprising a coolable double-wall tube including an inner tubular wall and an outer tubular wall, wherein said inner tubular wall is configured to convey said reaction gas to be quenched, and wherein a space defined by said inner tubular wall and said outer tubular wall is configured to convey a coolant; a tubular connection member having a bifurcating longitudinal cross-section comprising an exterior wall section and an interior wall section defining an intermediate space filled with refractory filler material, wherein a converging end of said connection member is arranged to be in connection with an uncoolable reaction gas conveying pipe, wherein said exterior wall section is connected with said outer tubular wall of said coolable double-wall tube, wherein an axial gap is left between said interior wall section and said inner tubular wall of said coolable double-wall tube; a sealing member configured to seal said axial gap between said interior wall section and said inner tubular wall of said coolable double-wall tube; and further comprising at least two mutually transversally positioned baffles arranged to guide a flow of coolant in said space defined by said inner tubular wall and said outer tubular wall of said coolable double-wall tube. ### Claim 24 (depends on 23) Heat exchanger according to claim 23, wherein at least one baffle is fixedly connected with an outside of said inner tubular wall of said coolable double-wall tube. ### Claim 25 (depends on 23) Heat exchanger according to claim 23, wherein said coolable double-wall tube comprises a coolant inlet nozzle arranged to let a coolant into said space defined by said inner tubular wall and said outer tubular wall of said coolable double-wall tube at a bottom level of said coolable double-wall tube close to said tubular connection member. ### Claim 26 (depends on 23) Heat exchanger according to claim 23, wherein at least one baffle extends into a direction of said coolant inlet nozzle. ### Claim 27 (depends on 26) Heat exchanger according to claim 26, wherein said at least one baffle is off-centered with respect to a central axis of said coolant inlet nozzle.