Corrosion problem of hydrogen sulfide in the DCS control room.
Thread Content
The hydrogen sulfide concentration in the environmental protection area of our company is particularly high. As we all know, hydrogen sulfide causes rapid corrosion of copper. There are several control systems in this area, such as the Grasso cryogenic unit control system and the Westfalia Wilo control system; in some areas where copper connectors are exposed, they turn black within a few days. Mobile phone SIM cards usually remain lit, but they turn black after being in that environmental protection area for some time. One of the Siemens CPUs has failed, and two RTD modules have already been replaced. Someone suggested that \"a pile of activated carbon and a blower can be used to filter the air.\" Is it a mature usage? Everyone, please help analyze it. Are there any other ways? Thank you
Replace the activated carbon frequently! It is best to install the blower in a place with good air quality; the room should be well-sealed to maintain a slight positive pressure, and it is advisable to have two doors!
Control equipment with G3 corrosion resistance certification can be selected
Yes, it must meet G3 standards. And if it has IP67 protection, that’s perfect
Personally, I think things like changing devices are not the root solution to the problem. There are strict regulations regarding the uncontrolled emission of hydrogen sulfide. The maximum allowable concentration in the air must also be strictly enforced. Therefore, it is necessary to identify the location of the hydrogen sulfide leak at its source, and address it by methods such as sealing the leak or replacing relevant components.
For locations with harsh environments, it is better to maintain a slight positive pressure in the control room; this reduces corrosion of the components. As Haiyou mentioned on the 5th floor, it’s important to address the problem at its root, starting from the source!
It seems that we’re all focusing on the trivial aspects instead of what’s really important – a tragedy for the Chinese people. Many companies act in this way; the reasons for this are, first, issues with the selection of equipment, and second, problems that arise during subsequent maintenance that cannot be resolved. These are issues related to both the manufacturing processes and the equipment itself. It is recommended to carry out a thorough maintenance shutdown
The source cannot be completely controlled, and environmental treatment generates hydrogen sulfide gas. Hydrogen sulfide is also present in pressurized gases. I want to know how organizations in similar situations handle it.
This post was last edited by greenrrtt on 2009-5-13 16:26. Hello everyone, I just came across this question while searching. This is exactly the topic I am working on: corrosion prevention in control rooms. Let’s discuss it. Corrosion resistance must meet the following requirements: Corrosion Rate: Rate of corrosion
Hydrogen sulfide, gas phase, liquid phase desulfurization agents; for inquiries, contact QQ1835473951:victory:
It seems the poster needs legal assistance. Under such conditions and in such an environment, the factory should suspend production for rectification.