Hebei Refining Technologies Co., Ltd. has been a trailblazer in clean energy solutions
Deodorizing refined liquid SH
Release time:
2018-11-29
Due to the increasing sulfur content in crude oil and the growing use of hydroprocessing, the hydrogen sulfide content in coking dry gas, hydroprocessing recycle hydrogen, and low-pressure gas has significantly increased, with H2S concentrations reaching over 20×104 mg/m3. While MDEA solvent offers several advantages for refinery gas purification, it also has drawbacks: it is easily oxidized and degraded, increasing corrosion; it dissolves a significant amount of heavy hydrocarbons, easily leading to solvent foaming; and its H2S absorption rate rapidly decreases with increasing acid gas load, resulting in unsatisfactory desulfurization under high sulfur loads. The special conditions of low pressure and high sulfur load present significant challenges for desulfurization design and operation.
Due to the continuously increasing sulfur content in crude oil and the increasing amount of product hydrotreating, the hydrogen sulfide content in coking dry gas, hydrotreated recycle hydrogen, and low-fraction gas has significantly increased, H2S concentration can be as high as 20×104mg/m3and above. Although MDEA solvent has a series of advantages in refinery gas purification, it also has the following disadvantages: firstly, it is easily oxidized and degraded, increasing corrosion; secondly, it dissolves a large amount of heavy hydrocarbons, easily leading to solvent foaming; thirdly, the absorption rate of H2S decreases rapidly with increasing acid gas load, resulting in unqualified desulfurization under high sulfur load. The special conditions of low pressure and high sulfur load pose great challenges to desulfurization design and operation. Currently, problems such as unqualified desulfurization after treatment, serious equipment corrosion, and accelerated solvent deterioration have become widespread.
Hebei Jingzhi Technology Co., Ltd. has been focusing on desulfurization and mercaptan removal technology research for many years. Aiming at the problems such as easy fouling, foaming, and decreased desulfurization activity at high amine concentration in the desulfurization system of high sulfur load products, a desulfurization auxiliary agent—deodorizing refined solution SH—has been developed and researched. Adding the deodorizing refined solution SH under high acid gas load conditions can not only improve the desulfurization activity of MDEA at high amine concentration and improve the effective amine concentration of lean solvent, enabling the unit to improve desulfurization capacity without changing the solvent circulation amount, but also effectively improve the solvent's resistance to oxidative degradation, prolong the service life of the desulfurization solvent, reduce the corrosion rate of equipment, and inhibit the foaming tendency of the solvent at high amine concentration. It can achieve comprehensive effects such as improving desulfurization depth and reducing energy and agent consumption, promoting the "safe, stable, long-term, full, and excellent" operation of the unit.
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