【Chemical Engineering Operations】Natural Gas Conversion Furnace
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This post was last edited by Xiao Gong 1985 on 2016-3-29 at 16:13. How often does a natural gas conversion furnace need to be repaired? Which parts are regularly inspected?
With proper use, maintenance can be carried out every 3 years. The main maintenance tasks include: catalyst replacement, furnace tube inspection, burner examination, lining repair, fan maintenance, control calibration... covering almost all aspects of major repairs.
In our factory, maintenance is generally carried out every three years; it mainly involves replacing the catalyst. For box-type furnaces, it is also necessary to inspect the pigtail pipes and walls, as well as the burners and replace the packing. For two-stage furnaces, the main task is to replace the burners
Why don’t we discuss the shell-and-tube heat-exchange type single-stage converter? Discussing box furnaces is annoying; their heat loss is too high. 1. In a heat-exchange type one-stage converter, since the pressure difference between the tube side and the shell side is very small, as long as the operating conditions remain stable, this type of converter can be used continuously until the catalyst needs to be replaced, without the need for maintenance or core extraction inspections. 2. For the operation of a two-stage furnace, it is only necessary to check whether the operating parameters are normal and to determine if uneven burning is occurring; otherwise, there is no need to consider maintenance issues ； Of course, when replacing the catalyst, it is necessary to check whether the cage at the bottom is deformed and whether the burner holes are distorted, in order to determine whether a replacement is needed; generally, there are no issues with the other jackets or refractory layers.
A shell-and-tube heat-exchange type one-stage conversion furnace does save natural gas, but it produces little steam and cannot supply steam externally; it may also require oxygen enrichment, resulting in high energy consumption. If the products produced need steam, then a fast boiler must be used, which is not cost-effective at all!
A conversion catalyst generally needs to be replaced every 3 years, while the burner should be cleaned annually. Flue ducts and air ducts also need to be inspected. The conversion tube needs to be inspected to assess its performance and determine the furnace’s operating condition. The burner cock needs to be cleaned to ensure smooth operation of the switch. For the two-stage conversion process, it is mainly necessary to check whether the burner is damaged, to inspect the refractory bricks, and to verify whether there are any damages to the gas pipelines between the two stages of conversion.
Are heat-exchange type single-stage conversion furnaces used in hydrogen production from natural gas or coke oven gas? Could you provide some information on this topic? My email address is 312615519@qq.com. Thank you! ! ! !