Patent ID: 7771674

Claim:
A multitubular catalytic gas-phase reaction apparatus, comprising: a plurality of reaction tubes arranged in parallel, a baffle capable of changing the direction of movement of a heat medium introduced into a reactor shell to a direction perpendicular to the longitudinal direction of the reaction tubes, and wherein the baffle is a segmental circle baffle, a space that is disposed in a region including a part of a section where the heat medium flows in the direction of the face of the baffle and does not have the reaction tubes arranged therein, and wherein the space is disposed in a segmental baffle window of the segmental circle baffle, and flow-adjusting rods, disposed in between the space and the reaction tubes, having the same longitudinal direction as that of the reaction tubes, and wherein the flow-adjusting rods are arranged in the range of from 1 to 10 rows along the boundaries of the spaces and the reaction tubes, and the flow-adjusting rods are supported by their penetration through the baffles.