WSA acid production

What method do you use for acid production? The WSA process can operate in hot standby mode or independently to produce acid from acidic gases. There should be corresponding instructions for this in the operation manual.

Reply 2# Clauspolunit: Topsox acid production process – acidic gases are burned separately! !

Please look carefully for the operation manual provided by Topsoo; it must be there, probably in the section discussing chain control. Below are our methods of operation; you can refer to them. The gas blowers K-3303A and K-3303B tripped, resulting in no gas entering the combustion furnace. Stop the acid mist control device X-3302A using HS-3387. This action can be delayed by three minutes to prevent the spread of acid mist when the device is shut down. Stop the acid mist control device X-3302B using HS-3389. This action can be delayed by three minutes to prevent the spread of acid mist when the device is shut down. Stop burner UY-3301 via UY-3301. Close the combustion air valve UV-3304 via UY-3304. Stop the combustion air blower K-3302A via UY-3303. Stop the combustion air blower K-3302B via UY-3305. Close the steam feed valve FV-3361 using UV-3361. The ammonia system is tripped via interlock trip group I-3 (see section 6.4). This action can be delayed by three minutes to achieve a smooth shutdown.

During normal production, the fuel gas supply is generally cut off. If the fuel gas supply is interrupted, there is no need for an emergency shutdown; continuous production can be maintained as long as a stable supply of acidic gas and other process conditions remain unchanged……

Generally, for acid production from high-concentration acidic gases, it is not necessary to add gas. However, for low-concentration acidic gases, it may be necessary to burn some additional fuel (this depends on the specific concentration of the acidic gas). I’m not sure which category the acidic gas in question falls into

Reply 6# In the Clauspolunit WSA unit, silicon oil as a combustible material is required to provide nuclei for acid formation, and fuel gas must be supplied continuously.

This interruption in the fuel gas supply only affects the operation of the WSA condenser, but it is usually also interlocked. It is recommended to check the relevant operation manual, which provides a more detailed explanation.

Reply to 6# Clauspolunit: What this friend might be referring to is the acidic gases from the low-temperature methanol washing process in coal chemical plants, rather than those from oil refining plants.

Reply to 7# tySky: You’re referring to the gas in the acid control unit; there’s no need to shut down the entire device

Dear experts, does anyone have any materials related to the design of WAS sulfur recovery processes? Things such as calculations for the main equipment and layout drawings, etc. Thank you. Email: hljcailai@163.com