Issues regarding the operation of the two-in-one furnace
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This post was last edited by sunjl1981 on 2013-1-6 at 23:35. I would like to ask the experts: The two-in-one furnace used in our company has recently shown an abnormal phenomenon during normal operation – while the pressures of hydrogen chloride and hydrogen remained stable, the flow rate of hydrogen suddenly dropped significantly, to the point where it seemed as though no hydrogen was flowing at all. This is very detrimental to production. Initially, we suspected that there was water in the hydrogen pipeline, caused by the cold weather leading to freezing; now that the pipelines are insulated, the problem still persists. This issue did not occur when we were only producing hydrochloric acid. I ask experts for help in answering this. # ， ， &
1. Is there any fragmentation of the packing in the three-stage packing absorption tower of the two-in-one furnace?； 2. Is there any change in furnace pressure during normal production? ； 3. In synthetic production, due to the high pressure of chlorine and low pressure of hydrogen, hydrogen is more affected ； 4. Is there air blockage in the pipes of the synthesis system? Bubbles have a significant impact on the synthesis process.
Another possibility is that the hydrogen gas contains alkali, and further testing is required
Hydrogen pipelines don’t need insulation; I’m not sure if the hydrogen used by the poster goes through any separation process
Could it be that the hydrogen pressure in the chlor-alkali plant is low while the pressure of liquid chlorine is high, causing the hydrogen to be pushed back? Or is it due to operations being carried out under pressure in subsequent stages?
Thank you to all friends for your enthusiastic participation. We have taken into consideration everything you mentioned. In the past, when the furnace was used only for producing hydrochloric acid, this problem did not occur; now it is used to produce hydrogen chloride gas, which is then used in the synthesis of vinyl chloride. There is no third-stage absorption process – only the furnace and a heat exchanger are in operation. Insulating the hydrogen pipelines is also not possible, as the hydrogen dehydration effect here is poor, there is a lot of moisture, and the weather is cold.
Water and alkalis in hydrogen can easily cause fluctuations in hydrogen pressure during winter
If the air intake volume suddenly decreases, it should affect the hydrogen pressure; instead, the pressure should increase. I believe the following are the possible reasons for this phenomenon: 1. Cold weather causes ice blockages in the air intake pipes; more drainage outlets are needed; 2. The roof of the synthesis furnace is too high, resulting in less hydrogen being delivered to the furnace; 3. Whether the flow meter’s installation site is blocked by impurities; 4. Whether the flame arrester in front of the furnace is blocked.
Could it be that the weather is cold, causing the flow transmitter to freeze up and stop working? It’s impossible for there to be no hydrogen supply; if the hydrogen supply were cut off, the fire in the furnace would have gone out long ago.
We have been studying the issue of hydrogen pressure fluctuations here for several years now. We have two systems: the pressure at the hydrogen distribution station fluctuates intermittently, but each time it is the pressure in the old system that rises while the pressure in the new system drops. The hydrogen from both systems goes into a buffer tank. We hope you can help us with this problem