Pre-shift furnace catalyst separate temperature rise vulcanization system and vulcanization method

Abstract

The invention discloses a separate temperature-increasing vulcanization system and a vulcanization method for a pre-shift furnace catalyst, belonging to the technical field of temperature-increasing vulcanization of catalysts. It is characterized in that two sub-pipelines are added to the carbon disulfide main pipeline (1), and the first sub-pipeline (2) is connected to the inlet pipeline (6) of the pre-shift furnace A, and the pre-shift furnace A is connected through the second sub-pipeline (3). Transformer B inlet pipeline (7), on the nitrogen pipeline branch (20) at the inlet pipeline of the intermediate converter main line, is connected to the pre-shift furnace A inlet pipeline (6) and the pre-shift furnace B inlet pipeline through valves and pipelines (7). The present invention uses the inlet process gas at the entrance of the intermediate shift furnace as a carrier to heat up the updated catalyst without auxiliary heating equipment, and only adds vulcanizing agent CS2 to carry out the single-furnace heating and vulcanization of the pre-shift furnace, so that the device does not stop. The on-line switching of the pre-converting furnace can be realized under the condition of a single temperature rise vulcanization, which meets the operation requirements of the device cycle.

Description

technical field [0001] The invention discloses a separate temperature-increasing vulcanization system and a vulcanization method for a pre-shift furnace catalyst, belonging to the technical field of temperature-increasing vulcanization of catalysts. Background technique [0002] The conversion unit of the coal gasification purification device is mainly to carry out oxidation-reduction reaction on the process gas generated by the gasifier under the condition of the catalyst to remove CO in the process gas. low-change” sulfur-resistant shift process, in which there are two pre-shift furnaces, one for start-up and one for standby. The service life of the catalyst in the pre-shift furnace usually designed in the prior art is about 1 year, that is, under normal production conditions Under these conditions, the continuous use of the two pre-shift furnaces can only last for two years. After 2 years, the pre-shift furnaces need to be switched regularly, and then the catalyst is load...

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Problems solved by technology

[0002] The conversion unit of the coal gasification purification device is mainly to carry out oxidation-reduction reaction on the process gas generated by the gasifier under the condition of catalyst to remove CO in the process gas. low-change” sulfur-resistant shift process, in which there are two pre-shift furnaces, one for start-up and one for standby. The service life of the catalyst in the pre-shift furnace usually designed in the prior art is about 1 year, that is, under normal production conditions Under these conditions, the continuous use of the two pre-shift furnaces can only be maintained for two years. After 2 years, the pre-shift furnaces need to be switched regularly, and then the catalyst is loaded and unloaded. Since the new catalyst is in an oxidized state and has no catalytic activity, after the loading and unloading update It is also necessary to carry out heat-up vulcanization treatment on the catalyst, and the device in the prior art does not have the conditions for the pre-shift furnace to heat up and vulcanize independently. The vulcanization process is powered by a compressor, nitrogen is used as a carrier, and a vulcanizing agent CS is added. 2 and hydrogen, heated by an electric heater for temperature-rising vulcanization

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