The thermometer at the first point of the reformer is broken!
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The thermometer of the first temperature of our reformer is broken. If we require oxygen distribution at this time, is it okay?
Other thermometers, pressure gauges, and flow meters are all good and can be used to dispense oxygen. The temperature of the oxygen dispensed must be greater than the ignition point of hydrogen. The effect of oxygen distribution can be seen in a short time.
But the thermometer at the first point is broken, and the temperature change cannot be seen at all.
Due to design defects or over-temperature operation, the first temperature of the reformer is easy to burn out. It is okay to add oxygen at this time, but the temperature of the second point rises very slowly after adding oxygen, about 3-5 minutes. It is safer to control the temperature of the coke oven gas entering the reformer above 630 degrees Celsius when adding oxygen. The amount of steam added should not be too large. The data requires that the water-vapor ratio be
Is the water vapor ratio you are talking about when the thermometer at the first point is broken?
Measuring the oxygen dosing reaction with the second point thermometer is a bit slow, but it works. Note that it is best to vent after one minute when igniting. Even without oxygen, the risk is small. (Water vapor is present)
Does the emptying after one minute refer to the emptying of transformation gas?
Actually, it doesn’t matter much if the first point is broken.: Just look at the second point and add oxygen, but make sure the outlet of the preheating furnace is above 630 degrees. ； The second point of the reformer should be above 580 degrees ； The coke oven gas volume before oxygen distribution is controlled to 8000NM3/h, and the steam distribution is more suitable at 8 tons/h. ； After adding oxygen, you need to wait for 5 to 7 minutes. When the temperature rises by 3 to 4 degrees at the second point, it means that the oxygen distribution has been successful. ； This is a valve that can open the oxygen distribution valve to increase the amount of oxygen. [The above data is for the 100,000 tons/year coke oven gas to methanol process]
What the 8th floor said makes sense. The first point of our reformer has been burned out for a year, so we operated it according to this method.
What the above poster said makes sense. We just did this and the effect was pretty good.
The first point is that many manufacturers have burned out and operate according to the above method. The most important thing is to control the outlet temperature of the preheating furnace and the bed temperature of the reforming furnace, and add oxygen for ignition within a safe range.
The reformer in our factory also broke down. We installed it at the second point of 480 and the outlet of the preheating furnace above 650. At that time, when it was just put into production and it was unstable, how many times did we do this? The gas volume is about 10,000 and the steam is 10-12 tons.
I think we can refer to the second point of temperature, and also based on the various data before the first point is broken. The oxygen supply to our unit reformer is when the preheating furnace outlet is at 650 degrees, reaching the ignition point of the gas, and the water vapor ratio is 0.8-0.9
Oxygen can be added. Our first thermocouple burned out and never recovered. When adding oxygen, we look at the temperature of the second point. Things to note when adding oxygen: When the temperature of the coke oven gas entering the reformer is greater than 630 degrees, the system pressure is stable, and the instrumentation and equipment are checked correctly, oxygen can be added. It will take about 5 minutes for the temperature to rise after adding oxygen. It is best to cut out the pressure before adding oxygen.