How should the exhaust gas treatment section of the sulfur recovery unit be designed in terms of technical approach?
Thread Content
This post was last edited by liaifeng on 2018-9-3 at 18:20. The latest environmental standards regarding exhaust emissions will come into effect in 2017, and many sulfur recovery units are being modified to meet these strict environmental requirements! What technologies are everyone looking into, and how will the transformations be carried out? If it’s convenient, let’s exchange ideas and share what we have!
We are involved in catalytic flue gas desulfurization.
The currently more mainstream method is DuPont Memorex’s power wave sodium-based desulfurization. Additionally, Sinopec Luoyang Institute has also developed it, but it seems to have no performance record. There’s also a 3D engineering design institute that uses the spray absorption method; one of their systems was just installed, and it’s not even 5 months old yet.
This post was last edited by SulfurBlind on 2016-7-26 at 14:51. Considerative can be given to advanced treatment for purifying exhaust gases, as well as to treating flue gases from incineration. There is fixed-bed adsorption, and it can be used at both locations. Alkaline cleaning, available at both locations. Packed tower, venturi tube, power wave available. When flue gas is converted into sodium sulfate, one must consider how to recycle and dispose of it ； The purified exhaust gas is washed to form NaHS and NaS, and is generally sent to the acid-neutralization tank. Flue gas can also be desulfurized using ionic liquids, allowing SO2 to be returned to the sulfur production furnace. I saw that a facility is designed in this way: sulfur production – combustion – ionic liquid desulfurization; it’s under construction. Some I’ve heard about, some I’ve communicated with, but I’ve never seen them. I’m going to install a set of vent gas purification Venturi washers.
What specific solution is it, and are there any by-products?
What is used for vent gas purification via venturi scrubbing?
NaOH is also used; basically, this is what’s employed for alkaline cleaning
NaOH solution, no by-products. Once the pH value of the waste liquid is within the acceptable range, it can be discharged directly to the wastewater treatment plant (of course, the COD level is also within acceptable limits).
Received, thank you! Is there any use for chelated iron technology? The investment for sodium-based desulfurization is high; moreover, can the acidic water by-product generated be treated by an acid gas stripping unit?
Currently, the resistance in the hydrogenation process is relatively high. By switching to a single-stage Claus process followed by combustion, and then using ionic liquids for absorption, the resistance throughout the system can be reduced; the emission levels can be kept below 50, and the operating costs are very low