Method and device for on-line rapid sulfur extraction and rapid heating of catalyst

Abstract

The invention discloses a method and device for on-line rapid sulfur extraction and rapid heating of a catalyst. The device comprises two sets of main fuel gas pipelines (10), an acid gas pipeline (11), a main combustion furnace (12) and a sulfur recovery device (13); the main fuel gas pipelines (10) and the acid gas pipeline (11) are connected with the main combustion furnace (12), and an outletpipe of the main combustion furnace (12) is connected with the sulfur recovery device (13), wherein an acid gas stop valve A (1) and an acid gas stop valve B (3) on the acid gas pipeline (11) enteringthe main combustion furnace (12) are provided with nitrogen pipelines (9); and the main fuel gas pipelines (10) are provided with coal gas pipelines (8), the two sets of main fuel gas pipelines (10)are connected with a furnace body and a head of the main combustion furnace correspondingly, the two sets of fuel gas pipelines are provided with a fuel gas stop valve A4 and a fuel gas stop valve B (5) correspondingly, the coal gas pipelines (8) are provided with coal gas valves (7), and fuel gas stop valves C (6) are arranged between the main fuel gas pipelines (10) and the coal gas pipelines (8). The shutdown sulfur extraction effect is good, the overtemperature phenomenon of a catalyst bed layer is avoided in the vehicle starting and shutdown processes, the catalyst is heated rapidly in the vehicle starting process, and meanwhile, the overhaul safety of the device is ensured.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for rapid on-line sulfur extraction and catalyst temperature rise, and also to the device for on-line rapid sulfur extraction and catalyst temperature rise. Background technique [0002] In the production of coal chemical industry, a large amount of H 2 The crude gas containing sulfides such as S, these sulfides are by-products produced by the coal chemical process, cannot be directly burned and discharged, and can only be discharged after further treatment to meet the emission standards. [0003] As the country's requirements for safety and environmental protection become increasingly strict, the treatment of sulfur-containing compounds is even more demanding and strict, and direct combustion emissions are strictly prohibited. The Claus sulfur recovery unit is the first choice for disposing of sulfur-containing compounds in the coal chemical industry. Howev...

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Problems solved by technology

The Claus sulfur recovery unit is the first choice for disposing of sulfur-containing compounds in the coal chemical industry. However, when it is parked for replacement, cooling, and sulfur extraction, the system relies on natural cooling, and the amount of sulfur extraction gas is small, the speed is slow, the sulfur extraction effect is poor, and the time is long.

[0004] When the catalyst is heated up, it is necessary to control the temperature rise rate of the combustion furnace at the same time. If the fuel gas volume is small, the temperature rise rate of the catalyst bed will be slow, the heat will be uneven, and the driving time will be long.

If the amount of fuel gas is large, the temperature rise of the combustion furnace is too fast, there are potential safety hazards for the equipment, and the catalyst bed temperature rises for a long time during the start-up process. These problems are directly related to the safety and environmental protection of the main coal chemical plant.

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