A non-emission presulfidation process and device for sulfur recovery hydrogenation catalyst

Abstract

The invention belongs to the technical field of sulfur recovery and tail gas treatment, and particularly relates to a sulfur recovery hydrogenation catalyst discharge-free prevulcanization process and device. The process comprises the following steps of building a prevulcanization flow process; inflating circulation gas; after the pressure reaches the required system pressure, starting a circulation fan; starting a tail gas heater for heating the circulation gas for gradually preheating the hydrogenation catalyst; compressing the prevulcanization circulation gas by a circulation fan, and then mixing hydrogen sulfide and hydrogen gas; enabling gas to enter the tail gas heater; after the temperature rise, enabling the gas to enter a hydrogenation reactor for performing prevulcanization on catalysts; after the heat of prevulcanization residue gas is recovered, enabling the gas to enter a quench tower to be cooled; enabling the cooled prevulcanization residue gas to enter a circulation fan after the liquid separation by a circulation tank, and raising the pressure; performing re-supplementation according to the concentration condition of the hydrogen sulfide and the hydrogen gas; performing cyclic reuse; after the partial cooling, discharging the prevulcanization residue gas into an absorption tower; after the amine liquid absorption, discharging the gas through an incinerator. The technical process is safe and reliable; the content of SO2 in the exhausted gas can be lowered to a value below 50mg / Nm<3>; the requirements of national standards are met.

Description

technical field [0001] The invention belongs to the technical field of sulfur recovery and tail gas treatment, and in particular relates to a non-emission presulfurization process and device for a sulfur recovery hydrogenation catalyst. Background technique [0002] In 2016, the state imposed stricter requirements on sulfur dioxide emissions, and further controlled the sulfur dioxide emission indicators in environmentally sensitive areas to 100mg / Nm 3 At the same time, it is required to meet the emission standards all the time, which means that the sulfur recovery unit must also meet the emission requirements during the start-up and shutdown stages, which will have a huge impact on the national petroleum, chemical and coal chemical industries. [0003] The energy industry will produce waste gas containing nitrogen and sulfur, in which the nitrogen element mainly exists in the form of ammonia, and the sulfur element exists in the form of hydrogen sulfide. The mainstream of t...

AI Technical Summary

Problems solved by technology

In the previous sulfidation process, the hydrogenation reactor was pre-sulfurized by using part of the process gas containing 1mol% of the sulfur production process. The amount of pre-sulfurized residual gas was too large to be effectively treated, causing excessive emissions from the device.

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