Adiabatic axial flow converter

Patent metadata

Field	Value
Publication number	US-2020384431-A1
Application number	US-201816764655-A
Country	US
Kind code	A1
Filing date	Dec 19, 2018
Priority date	Dec 20, 2017
Publication date	Dec 10, 2020
Grant date	—

Abstract

In an adiabatic axial flow converter, in which process gas passes from an outer annulus via a catalyst bed, wherein the process gas is converted to a product, to an inner centre tube, the catalyst bed comprises at least one module comprising one or more catalyst layers. Feed means are arranged to provide a flow of process gas from the outer annulus to an inlet part of one or more modules, and collector means are arranged to provide a flow of product stream of converted process gas which passes axially through the catalyst bed of one or more of the modules to the centre tube.

First claim

1 . Adiabatic axial flow converter, in which process gas passes from an outer annulus via a catalyst bed wherein the process gas is converted to a product, to an inner centre tube, wherein
the catalyst bed comprises at least one module comprising one or more catalyst layers having a height hcat, feed means are arranged to provide a flow of process gas from the outer annulus to an inlet part of one or more modules, and collector means are arranged to provide a flow of product stream of converted process gas which has passes axially through the catalyst bed of one or more of the modules to the centre tube.

2 . Adiabatic axial flow converter according to claim 1 , comprising two or more modules.

3 . Adiabatic axial flow converter according to claim 1 , wherein the converter is arranged for two or more modules to be operated in parallel and/or in series.

4 . Adiabatic axial flow converter according to claim 1 , wherein the pressure drop Dp is the same within +−5% across modules operated in parallel.

5 . Adiabatic axial flow converter according to claim 1 , wherein the one or more catalyst layers in modules operated in parallel comprises the same catalysts.

6 . Adiabatic axial flow converter according to claim 1 , wherein the height of the one or more catalyst layers in modules operated in parallel is the same.

7 . Adiabatic axial flow converter according to claim 1 , wherein the collector means is part of at least one module.

8 . Adiabatic axial flow converter according to claim 1 , wherein the reactor is arranged with two or more module sections, each module section comprising one or more modules.

9 . Adiabatic axial flow converter according to claim 1 , comprising a quenching zone wherein the product gas from a section is quenched, obtaining a quench product stream, and,
wherein the converter comprises means to provide at least part of the quenched process stream as feed for one or more subsequent sections.

10 . Adiabatic axial flow converter according to claim 9 , wherein fresh process gas or partly converted, optionally cooled process gas is used as quench gas.

11 . Adiabatic axial flow converter according to claim 9 , wherein the modules in different sections may be different from each other, contain different catalyst and be differently arranged.

12 . Adiabatic axial flow converter according to claim 9 , wherein at least two or more sections are arranged to operate in parallel.

13 . Adiabatic axial flow converter according to claim 9 , wherein two or more sections are arranged to operate in series.

14 . Adiabatic axial flow converter according to claim 1 , which is used as ammonia reactor, methanol reactor, methanization reactor, shift reactor and other exothermic reaction processes.

Assignees

• Haldor Topsoe As

Inventors

• Speth Christian Henrik
• Dahl Per Juul

Classifications

• B01J8/0285

  Heating or cooling the reactor (for tubular reactors in furnaces B01J8/062) · CPC title

• B01J2208/021

  comprising a plurality of beds with flow of reactants in parallel · CPC title

• B01J8/06

  in tube reactors; the solid particles being arranged in tubes · CPC title

• B01J2208/00194

  Tubes · CPC title

• B01J8/0257 Primary

  in a cylindrical annular shaped bed · CPC title