Fixed bed multitube reactor
View Patent ↗A fixed-bed multitubular reactor, comprising a plurality of reaction tubes ( 3 ) filled with a catalyst and catalyst temperature measurers ( 4 ) measuring the temperatures of the reaction tubes near the radical center parts thereof. The catalyst temperature measurer ( 4 ) is installed in each of a part of the plurality of reaction tubes ( 3 ), and the measurement positions thereof are differentiated from each other in the longitudinal direction of the reaction tubes ( 3 ).
1. A fixed-bed multitubular reactor, comprising:
a plurality of reaction tubes to be packed with a catalyst;
catalyst temperature measures equipped to measure the temperature near the centre part in the radial direction of the reaction tubes;
a heat-medium bath located outside of said reaction tubes;
heat-medium bath temperature measures measuring temperatures of said heat-medium;
at least a portion of said plurality of reaction tubes being arranged so as to be adjacent to each other to form at least one reaction tube group;
wherein the catalyst temperature measures being installed in all of the plurality of the reaction tubes or at least a part of said reaction tubes forming said at least one reaction tube group, the measurement positions thereof being different from each other in the longitudinal direction of the reaction tubes; and
the heat-medium bath temperature measures are equipped corresponding to the catalyst temperature measures so that the measurement positions Q thereof are set at the same height as the measurement positions P of the catalyst temperature measures.
2. The fixed-bed multitubular reactor according to claim 1 , wherein the catalyst temperature measurers are equipped in 5 to 35 tubes out of a reaction tube group comprising 5 to 105 reaction tubes adjacent to each other.
3. The fixed-bed multitubular reactor according to claim 2 , wherein flow patterns of a heat medium are different in the reactor, and a plurality of the reaction tube groups are provided and respectively allocated to the positions where the flow patterns of the heat medium are different.
4. A method for conducting a gas-phase catalytic oxidation reaction, comprising:
oxidizing a gas in the fixed-bed multitubular reactor of claim 1 .
5. The method according to claim 4 , wherein the gas-phase catalytic oxidation reaction is a reaction synthesizing an unsaturated aldehyde or an unsaturated carboxylic acid from propylene, isobutylene or tertiary butyl alcohol.
6. The method according to claim 4 , wherein the gas-phase catalytic oxidation reaction is a reaction synthesizing an unsaturated carboxylic acid from an unsaturated aldehyde.
7. The fixed-bed multitubular reactor according to claim 1 , wherein a plurality of the reaction tubes groups are allocated circularly and at least one reaction tube group is allocated in each section L which is made by separating the cross section of the reactor in the radial direction from the centre M into two or more sections having the same area.
8. The fixed-bed multitubular reactor according to claim 1 , wherein the length of the reaction tube is 2 to 7 meters.
9. The fixed-bed multitubular reactor according to claim 1 , wherein the setting interval of the catalyst temperature measures is from 0.1 to 2 meters.
10. The fixed-bed multitubular reactor according to claim 1 , comprising a plurality of reaction tube groups arranged in a triangular configuration.
11. The fixed-bed multitubular reactor according to claim 1 , comprising a plurality of reaction tube groups arranged in a square configuration.