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Air grill system for an oxidation reactor and method of accommodating deflection therein

A reactor and air technology, applied in chemical instruments and methods, hydrocarbon ammonia oxidation preparation, organic chemistry, etc., can solve problems such as mechanical failure

Active Publication Date: 2020-12-25
INEOS EURO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, in these designs, the force of the upwardly moving air combined with the inherent expansion of the air grille panels can lead to mechanical failure of these welds

Method used

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  • Air grill system for an oxidation reactor and method of accommodating deflection therein
  • Air grill system for an oxidation reactor and method of accommodating deflection therein
  • Air grill system for an oxidation reactor and method of accommodating deflection therein

Examples

Experimental program
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Embodiment Construction

[0031] Figure 5 A first feature of the technology of the present disclosure is shown, wherein the air grill 14 is spaced apart from the feed distributor 16 by a suitable distance, specifically 6 to 24 inches (~15 to ~61 cm). Specifically, as shown, feed distributor 16 includes a plurality of feed shrouds 60, each associated with a respective feed nozzle defined in header 30 or branch 32 of the distributor system. couplet. Each feed shield defines a proximal end 62 connected to its respective header 30 or branch 32 and a distal end 64 distal therefrom, wherein the feed shield 60 is arranged to direct the propylene passing through its respective feed nozzle. and ammonia feed are directed down toward the air grid 14 into the interior of the acrylonitrile reactor. Meanwhile, the air grill 14 takes the form of a continuous metal plate 70 arranged below the feed distributor 16 and defining an upper surface 72 , a lower surface 74 and a series of bars extending between the upper s...

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PUM

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Abstract

Inadequate reactant mixing as well as localized reactor hot spots in a commercial acrylonitrile reactor can be significantly reduced if the distance between sparger system 16 and air grid 14 is controlled to be within 6 to 24 inches (~15 to ~61 cm), preferably 8 to 12 inches (~20 to ~30.5 cm). In addition, problems of air grid movement on or off support and air grid mechanical failure can be eliminated essentially completely by means of a modified system for attaching the air grid to the walls of the reactor as well as its internal support beams.

Description

Background technique [0001] In the commercial manufacture of acrylonitrile, propylene, ammonia, and oxygen react together according to the following reaction scheme: [0002] CH 2 =CH-CH 3 + NH 3 + 3 / 2 O 2 → CH 2 =CH-CN+ 3 H 2 o [0003] This process, commonly referred to as ammoxidation, takes place in the gas phase at elevated temperatures in the presence of a suitable fluidized bed ammoxidation catalyst. [0004] figure 1 A typical ammoxidation reactor for carrying out the process is shown. As shown in this figure, reactor 10 includes reactor wall 12 , air grid 14 , feed sparger 16 , cooling coil 18 and cyclone 20 . During normal operation, process air is charged into reactor 10 through air inlet 22 and a mixture of propylene and ammonia is charged into reactor 10 through feed distributor 16 . The flow rates for both are high enough to fluidize the bed 24 of ammoxidation catalyst inside the reactor where the catalytic ammoxidation of propylene and ammonia to acry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/44C07C255/08C07C253/26
CPCB01J8/44
Inventor T.R.麦克唐奈J.R.库奇D.R.瓦纳P.T.瓦赫滕多夫T.G.特拉弗斯
Owner INEOS EURO LTD