Tube nest type fixed bed reactor system
A fixed bed reactor and reactor system technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve the problems of unable to adjust the temperature distribution of the bed, large axial temperature difference of the reactor, obvious hot spots, etc., and achieve catalyst good overall performance
Active Publication Date: 2013-06-26
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0007] The purpose of the present invention is to provide a tube-and-tube fixed-bed reactor system suitable for strong exothermic reactions on the basis of the prior art, to solve the problem that the bed temperature distribution cannot be adjusted by circulating water in the prior art, causing reaction The temperature difference in the axial direction of the device is large and the hot spots are obvious
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Embodiment 1
[0035] This embodiment adopts figure 2 The shown scheme and apparatus carry out the Fischer-Tropsch synthesis reaction. The Fischer-Tropsch synthesis catalyst filled in the reactor has a trade name of RFT-2, which is produced by Changling Catalyst Factory of Sinopec Catalyst Branch. Catalyst loading capacity 800ml. Six thermocouples are uniformly distributed along the axial direction in the reactor to detect the temperature distribution of the bed.
[0036] The operating conditions of the reactor are: average temperature 215°C, pressure 3.0MPa, reactor inlet H / C molar ratio 2.0, synthesis gas volume space velocity 500h -1 , Cycle ratio 9.
[0037] The pressure of steam drum 5a is 1.84MPa, and the pressure of steam drum 5b is 1.77MPa.
[0038] The axial temperature distribution of the reactor and the effect of the Fischer-Tropsch synthesis reaction are shown in Table 1.
[0039] Table 1
[0040] Reactor axial temperature, ℃
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The invention relates to a tube nest type fixed bed reactor system which comprises a reactor shell (1), a reaction tube (2), tube plates (3) arranged at the two ends of a reactor, and a deflection baffle (16), wherein the reactor shell (1) is internally provided with (n-1) reactor middle tube plates (4) vertical to the axial direction; the reactor shell (1) is divided into n cavities along the axial direction by the reactor middle tube plates (4); and the reaction system comprises (n+1) / 2 steam packet heat taking systems, wherein the (1+m)th cavity and the (n-m)th cavity which are arranged along the material flow direction in a reaction tube are connected in series and share the same steam packet heat taking system. The tube nest type fixed bed reactor system is mainly applicable to strong heat release reaction system, especially to Fischer-Tropsch synthesis reaction. The invention can adjust the temperature distribution of a reactor bed layer so as to lead the bed layer temperature to be evenly distributed, and overcomes that defects of higher reactor axial temperature difference and obvious hot spots of the strong heat release reaction.
Description
technical field [0001] The invention relates to a fixed-bed reactor system, in particular to a tube-and-tube fixed-bed reactor system suitable for strong exothermic reaction. Background technique [0002] For gas-solid phase catalytic reaction systems, especially some gas phase oxidation reactions and Fischer-Tropsch synthesis reactions are strongly exothermic reactions. When the reaction device adopts a tube-and-tube reactor, in order to control the temperature of the reactor bed, the prior art includes reducing the diameter of the tube, diluting the catalyst with inert particles, and adding superconducting heat fins in the catalyst bed. and other methods. In addition, the shell-side external circulation heat exchange system is also a commonly used method. For example, heat can be obtained by using a steam pack. The tube side of the reactor is filled with catalyst, and the reaction raw materials react in the tube side and release heat. The shell side of the reactor is fe...
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IPC IPC(8): B01J8/06
Inventor 吴昊胡志海聂红徐润田鹏程夏国富
Owner CHINA PETROLEUM & CHEM CORP