The relationship between exhaust gas purification and hydrogen

This post was last edited by ylb913 on 2015-12-7 at 11:16. The relationship between exhaust gas purification and hydrogen: 1. It is claimed that increasing the hydrogen level can raise the temperature at the inlet of the hydrogen reactor; this statement is incorrect from the start, and an increase in the reactor’s temperature is also not right. ——As long as there is enough hydrogen, that’s sufficient. Processes like those used by Italy’s NIGI company do not require the addition of hydrogen; instead, they only require a ratio of H2S:SO2 of 4–6:1. The hydrogen present in the process gas itself is enough. We once ran the facility for three days without adding hydrogen intentionally, and it still operated normally; at that time, it was found that the process gas contained about 1% hydrogen on its own. Generally, it is required that the hydrogen concentration at the inlet of the hydrogenation reactor be 3–5%, while that at the outlet of the quench tower should be 2–4%. This setting takes into account both fluctuations in the plant’s operation and the temperature at which the exhaust gases are burned. 2. If the amount of hydrogen is too high, it will affect the temperature of the incinerator. This is right. 3. Once the hydrogen online analyzer breaks down, adjustments can be made based on the hydrogen flow rate and the results of analytical tests.

:)Do you keep adding hydrogen inside? In our process hydrogenation section, there is this external hydrogen source, which has not been used yet; operations have proceeded without any issues. If too much hydrogen is added, could it cause an overly intense reaction in the catalytic oxidation reactor (where air is present along with excess hydrogen)?~~~

It’s certain that an increase in the amount of hydrogen has an effect on the temperature of the incinerator, right? Excess hydrogen participates in the reduction reactions within the hydrogenation reactor. Excess hydrogen results in a relatively long flame zone inside the furnace. There is an exhaust gas heater behind the incinerator, which raises the temperature of this heater; as a result, the inlet temperature of the hydrogenation reactor also increases. Therefore, I believe that the level of hydrogen content has a significant impact on the hydrogenation reactor. If there are any mistakes, please feel free to point them out

A high hydrogen content affects the temperature of the exhaust furnace and increases energy consumption; it is generally kept at 2-3%. If it is too low, it can cause blockages in the quench tower