Process for activating CO sulfur-resistant shift catalyst before start-up of pulverized coal gasification device

Abstract

The invention relates to a process for heating and activating a carbon monoxide sulfur-resistant shift catalyst. The catalyst is heated and activated by the process in a circulating vulcanization mode. A heating vulcanization line is arranged at an inlet of each shifter, and a drop-out line is arranged at an outlet of each shifter. Each shifter not only can be independently heated and perform vulcanization, but also can be heated and perform vulcanization in a series connection manner. During heating and vulcanization, the shifters which are heated or complete vulcanization can be disconnected from a system, and the follow-up shifters are directly heated or directly perform vulcanization. The process is further characterized in that after catalysts of a certain shifter are changed, the shifter can be disconnected from the system to be independently heated or independently perform vulcanization. By the aid of the process, start-up expense of a shifting device can be effectively reduced, and start-up time of the shifting device can be effectively shortened.

Description

technical field [0001] The invention relates to a process for activating a CO sulfur-tolerant conversion catalyst before starting up a supporting SHELL pulverized coal gasification device. Background technique [0002] The carbon monoxide and sulfur-tolerant conversion processes matched with the SHELL pulverized coal gasification process mainly include high water-gas ratio technology, low water-gas ratio technology, and low water-gas ratio combined with high water-gas ratio technology. Since the CO content in the crude gas produced by the SHELL pulverized coal gasification process is as high as 60%~65%, if the crude gas is used to produce synthetic ammonia, since the CO content at the outlet of the conversion device is required to be controlled at about 0.4%, no matter which conversion device is selected Generally, at least 4 converter furnaces are required. [0003] The active components of the newly loaded carbon monoxide sulfur-tolerant shift catalyst are in the oxidatio...

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Problems solved by technology

[0006] Due to the large number of shift furnaces and the large amount of catalyst loading in the carbon monoxide sulfur-resistant shift process matched with the SHELL pulverized coal gasification process, if the traditional cycle vulcanization method is adopted, all the shift furnaces are connected in series and the temperature is raised for vulcanization at the same time, the pressure drop of the system will be large , the temperature rise of the bed layer should not be controlled, the vulcanization time is long, and the driving cost is high

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