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Tubular reactor for use in polymerization reactions having a design pressure PR of 40-65 barg. The reactor includes a tube with a wall, and at least a portion of the tube is oriented vertically, with at least part of the vertical portion being surrounded by a concentric jacket for the passage of coo

Tubular reactor for use in polymerization reactions having a design pressure PR of 40-65 barg. The reactor includes a tube with a wall, and at least a portion of the tube is oriented vertically, with at least part of the vertical portion being surrounded by a concentric jacket for the passage of cooling fluid. The design pressure in barg of the jacket PJ is less than 0.0018·PR2.25.

대표청구항 ▼

1. Tubular reactor for use in polymerisation reactions having a design pressure PR of 40-65 barg, said reactor comprising a tube having a wall, at least a portion of the tube being oriented vertically and at least part of which vertical portion is surrounded by a concentric jacket for the passage of

1. Tubular reactor for use in polymerisation reactions having a design pressure PR of 40-65 barg, said reactor comprising a tube having a wall, at least a portion of the tube being oriented vertically and at least part of which vertical portion is surrounded by a concentric jacket for the passage of cooling fluid, wherein the design pressure in barg of the jacket PJ is less than 0.0018·PR2.25. 2. Reactor according to claim 1, wherein the actual thickness of the reactor wall is either no more than 2 mm greater or no more than 10% greater than the wall thickness t (mm) calculated according to the relationship t=PR·R/(10S−0.5PR)+C+tol where R is the internal radius of the reactor tube in mm, S is the design stress intensity at the design temperature in MPa, C is the sum of the inside and outside corrosion allowances for the reactor wall in mm, and tol is the manufacturing tolerance in mm. 3. Reactor according to claim 1, wherein the design pressure in barg of the jacket PJ is less than 0.0005·PR2.52. 4. Reactor according to claim 1, wherein the actual thickness of the reactor wall is either no more than 1 mm or no more than 5% greater than the wall design thickness t (mm) calculated according to the relationship t=PR·R/(10S−0.5PR)+C+tol where R is the internal radius of the reactor tube in mm, S is the design stress intensity at the design temperature in MPa, C is the sum of the inside and outside corrosion allowances for the reactor wall in mm, and tol is the manufacturing tolerance in mm. 5. Reactor according to claim 1, wherein the design pressure in barg of the jacket PJ is greater than H/10 where H is the vertical height of the vertically oriented portion of the jacket in meters. 6. Reactor according to claim 1, wherein the design pressure of the jacket PJ is such that the wall thickness required to withstand the pressure PJ is equal to or less than the wall thickness required to withstand the internal reactor design pressure PR. 7. Reactor according to claim 1, wherein the thickness of the reactor wall is greater at the lowest part of the reactor than at the highest part. 8. Reactor according to claim 1, wherein the reactor wall is constructed of a material having a tensile strength of at least 447 MPa. 9. Reactor according to claim 8, wherein the reactor wall is constructed of a material having a tensile strength of above 451 MPa.