Exchange on methods for treating sulfur recovery exhaust gases

We used a set, it didn’t work; now it’s just useless! Annoying----

What went wrong? Can we talk?

Is it a problem with environmental standards not being met, or is it an issue of blockage?

The Scott or Locat method works well, but the investment and operational costs are high!

Desulfurization can be achieved using ionic liquids; detailed info: QQ898323827

Using ionic liquid for desulfurization after direct combustion not only yields good desulfurization results but also significantly reduces costs

~~Ammonia-based desulfurization is relatively mature and stable~~~ There are methods that involve using dilute sulfuric acid, which is commonly used in sulfuric acid plants; there are also methods that make use of Consolf for exhaust gas treatment. The actual performance of these methods is generally average :)

Currently, in principle, the ammonia method, alkali method, ionic liquids, and Kunsoff method are the most thorough approaches for treating Claus off-gases; they are all methods for desulfurizing the flue gases at the post-thermal combustion stage. However, each of these processes has its own fatal shortcomings. The ammonia method faces issues such as ammonia leakage, crystallization, clogging, and corrosion. The alkali method requires a large amount of alkali, and the treatment of concentrated brine poses a problem. Ionic liquids and Konsolf belong to the same category of methods, but acid corrosion is their weak point. At present, various processes are still in the stage of exploration and improvement. It is believed that with the introduction of new emission standards, these processes will meet those standards and be able to operate for extended periods of time. The Scott process has been the best and most widely used method for treating Claus off-gases to date. However, with the implementation of new emission standards, this process becomes less effective, as there is a balance to be maintained in both the reduction-hydrolysis reaction and the absorption tower. Although it is theoretically possible to achieve a state of equilibrium, emissions can exceed permissible levels when fluctuations occur in the system. However, the sulfur import process package used by Yunnan Petrochemical still employs this process, and everyone is looking forward to seeing the verification of its operational performance.

Is the ammonia-based desulfurization method from Jiangnan Environmental Protection being used? Is it due to the entrainment of elemental sulfur in ammonia? Could you explain it in detail?

As someone mentioned above, the ammonia-based desulfurization method is relatively mature and stable, with some systems operating well; as for why others don’t perform well, we need to take a look. Since most coal chemical plant boilers use the ammonia-based desulfurization method, it is the most economical approach from a system perspective to use the ammonia method for treating sulfur recovery exhaust gases.