When drying the dryer, should we consider the impact of water produced by fuel gas combustion on the catalyst?
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During the drying process, the fuel gas will react to generate water vapor. During the heating process of the reactor, part of the steam will inevitably encounter the cold catalyst bed and form condensation water. Will the condensation water cause damage to the pores of the catalyst during the heating process?
I feel that the impact should not be too great. The moment the condensed water is formed, it will be vaporized by the high temperature and taken out of the reactor by the high temperature gas!
The impact definitely exists, but there seems to be no better way to solve this problem, so it is difficult to consider the impact. I wonder if other friends have a better way?
There will be no impact, because the catalyst is usually not installed in the dryer, and the catalyst is installed after the reactor is dried.
System drying generally uses nitrogen as the drying medium. How can fuel gas be brought into the system? What type of reactor is it?
It should be done by drying the oven first and then filling it with catalyst.
Does that mean that before the catalyst manufacturer hands over the catalyst, the catalyst has been dried, that is, the moisture in the catalyst has been dried out?
Why am I restricted from rating others?
The purpose of the dryer is to dry the moisture in the lining materials of the sulfur converter and tail gas hydrogenation reactor so that the lining materials meet the usage conditions and will not be affected:)
During test run, you can bake the furnace first and then fill it with catalyst. However, if there is a problem with the furnace during production and maintenance is required, it is impossible to remove the catalyst. Generally, there is a strict curve when heating up, and the heating rate is slow, which will not affect the catalyst. ； If the combustion chamber is rebuilt, the heating rate must be strictly followed when heating.
The electric drying method can be used and no water will be generated.
Generally, the catalyst is installed after the oven is completed.
When the new device is started for the first time, an electric heater is used for drying. The dryer also has a prescribed dryer curve. There is also a certain constant temperature time at different temperature stages. The purpose is to remove the moisture or crystallized water in the reactor. At this stage, there is no catalyst in it, so there will be no impact! If gas is used to heat up and produce moisture in future operations, it will be short-lived and will be taken out quickly. What's more, before entering the reactor, the temperature of the front furnace has already reached about 1,000 degrees, so this impact is completely unnecessary.
During the first test run, first dry the oven and then install the catalyst. When starting to heat up, wait until the furnace temperature reaches 600°C before changing the flue gas into the converter to heat up. When heating up, first upgrade to the secondary converter and then the primary converter. The moisture generated by gas combustion exists in the gaseous state and will not affect the catalyst.
It shouldn't have any impact, because the temperature is always relatively high during the oven process. As mentioned above, even if water is generated, it will be vaporized.
Set up an oven exhaust port before the converter. Before 600 degrees, the oven process gas is directly discharged from the exhaust port and does not enter the converter. After 600 degrees, the process gas is introduced into the converter to solve this problem!
The so-called impact is due to the catalyst being immersed in liquid water, causing deformation of the catalyst and resulting in a decrease in surface area. After understanding this principle, you can easily understand why the temperature must be raised for two revolutions first. The purpose is to prevent water vapor from condensing. After all, condensation will be generated during the re-drying process of the oven and dryer, especially in the corners of the re-system. You can discuss how to avoid it as much as possible. In addition, please be sure to explain the ins and outs of the issue clearly when raising your own questions, otherwise you will waste time and resources.