A Radial Constant Temperature Reactor with Water Transfer Heat

Abstract

The invention discloses a radial constant-temperature reactor by using water to transfer heat. The radial constant-temperature reactor is characterized in that a heat transferring pipe bundle comprises a water feeding pipe, a water discharging pipe, a water-feeding distribution box, a water guiding pipe, a cecum pipe, a ring pipe, a water-discharging branch pipe and a water collecting box; the water feeding pipe is connected with the water-feeding distribution box which is connected with the water guiding pipe; the cecum pipe comprises a main pipe positioned at the center and a plurality of auxiliary pipes arranged along the periphery of the main pipe; the top part of the main pipe is opened and the bottom part of the main pipe is closed; the two ends of the auxiliary pipes are respectively communicated with the top part and the bottom part of the main pipe; the water guiding pipe enters from the top part of the main pipe and is sheathed in the main pipe; the top part of the main pipe is communicated with the ring pipe which is communicated with the water collecting box by the water-discharging branch pipe; the water collecting box is connected with the water discharging pipe; and the cecum pipe is arranged in a catalyst frame. The radial constant-temperature reactor disclosed by the invention has the advantages that the catalyst frame, the heat transferring pipe bundle and a bearing shell are separated, so that convenience is brought for maintenance and self discharging and filling of catalysts; the heat transferring water pipe is buried in a catalyst bed layer, reaction heat in the catalyst bed layer can be removed in time, and the occurrence of the phenomenon that the original transformation, synthesis and hydrogenation catalysts is avoided.

Description

technical field [0001] The invention relates to a fixed-bed catalytic reactor, in particular to a radial constant-temperature reactor for heat removal by water. Background technique [0002] The CO shift reactor is a widely used reactor in the chemical industry. During this period, people have made many improvements to the shift reactor, from the original full axial to full radial, and achieved good results in the resistance of the catalyst bed. effect, but the catalyst bed is still an adiabatic reaction. The catalyst bed is divided into several beds, and indirect heat exchange or water cooling is adopted between each bed. This kind of indirect heat exchange recovery transformation system has the disadvantages of low thermal energy grade, low recovery efficiency of sensible heat and latent heat, easy overheating of the catalyst, simultaneous transformation and side reactions such as methanation, etc. [0003] Coal-to-ethylene glycol carbonylation reactor currently uses a ф2...

AI Technical Summary

Problems solved by technology

This indirect heat exchange recovery transformation system has low thermal energy grade, low recovery efficiency of sensible heat and latent heat, easy overheating of the catalyst, simultaneous transformation and side reactions such as methanation, etc.

[0003] Coal-to-ethylene glycol carbonylation reactor currently uses a ф25X2 tube to fill the catalyst, and water outside the tube to remove heat. A column and tube reactor is composed of thousands of axial ф21 cylindrical catalyst beds, and the gas distribution is uneven. Uniformity, many side reactants, large catalyst bed resistance, large thermal stress, equipment leakage, a 200,000-ton / year ethylene glycol plant carbonylation reactor requires 6 shell-and-tube reactors to operate in parallel, and the project investment major defect

[0004] The esterification hydrogenation reactor for coal-to-ethylene glycol currently uses ф38X2 tubes to fill catalysts, and water outside the tubes to remove heat. A column-tube reactor is composed of thousands of axial ф34 cylindrical catalyst beds, and the gas distribution Inhomogeneity, many side reactants, large catalyst bed resistance, large thermal stress, equipment leakage, large engineering investment and other defects

[0005] The reaction of coal to natural gas adopts the heat transfer method of n adiabatic beds and n waste superheated boilers, and it is necessary to increase the reactant water vapor to suppress the reaction of the first and second adiabatic beds, and configure the circulating gas at the same time, otherwise the second 1. Flying temperature phenomenon in the second adiabatic bed, high energy consumption in operation, large equipment investment, large system resistance and other defects

[0006] The Fischer-Tropsch synthesis reaction of coal-to-oil and coal-to-paraffin has not yet operated a large-scale device, and some small-scale Fischer-Tropsch synthesis reactors in operation are also tubular reactors, and Fe (or Co) series catalysts are packed in ф76X4 In the tube, there are still defects such as uneven gas distribution, overheating, carbon deposition, low yield of long-carbon paraffins, high resistance, equipment leakage, and difficulty in large-scale expansion.

Images