The cold temperature of crude gasoline is 60 degrees
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There are three water-coolers at the top of the fractionation tower. One of them was forced to be removed because it was leaking. After that, the crude gasoline and rich gas rose to 60 degrees. What do you think will be the consequences? (relative to equipment and product quality)
I personally think that if the temperature of the rich gas is high, it will be bad for the inlet of the air compressor, because if the temperature is high, it will carry more oil, and if the crude gasoline temperature is high, it will be detrimental to the absorption of stable posts.
The liquid level in the reflux tank at the top of the tower drops and the reaction pressure rises. It has a certain impact on the subsequent stability system, and also has an impact on the machine inlet. However, I personally think that 60 has little impact. Just turn up the engine speed, reduce the anti-flight, and control the liquid level of the top reflux tank.
The rich gas temperature of 60 degrees is the upper limit of the inlet temperature of the air compressor. There is no big problem when the processing capacity is small, that is, when the rich gas flow is small.； If the processing capacity is large, the amount of rich gas will also be large. Because the temperature is high, the linear speed of the rich gas will increase, and the amount of mist entrainment will increase suddenly. The inlet of the air compressor will be oily, and the working condition of the air compressor unit will deteriorate, which will damage the blades of the unit. In serious cases, the unit will be destroyed! ! If the temperature of crude gasoline is 60 degrees, the absorption will be insufficient, and the tower will be flushed if it is serious. The dry gas will not be dry, and the oily gas will be unqualified. At the same time, the pressure of the absorption stabilization system will also increase, and the entire system will "swell", which may cause the safety valve to trip! ! It’s better to consider cooling down and add some extra water spray temporarily, the effect is good!
The friend on the 4th floor said it more comprehensively, so I won’t go into details here. The high temperature of crude gasoline does not have a great impact on equipment corrosion, but has a greater impact on dry gas quality.
When the temperature is too high, the power of the air compressor increases and the work is increased, because high temperature is not conducive to compression, and high temperature brings more oil. If the temperature of the crude gas oil is too high, it is unfavorable for absorption. If the absorption effect is poor at this time, the heat exchanger must be replaced due to the reduction in volume.
The increase in crude gasoline temperature has a certain impact on the operation, which can affect the reaction pressure, processing load, air compressor load, absorption tower absorption effect, etc. The top temperature can be appropriately lowered on the premise of ensuring that the dry point of the crude gasoline is qualified, and the air cooling tube bundle can be flushed with water to remove dust to increase the air cooling effect.
As for the dangers, everything has been said above. I don't know what measures you have taken. Is it necessary to reduce the volume, spray the cooler, and replace the new pipe bundle as soon as possible. There should be a spare. Strengthen inspections of air compressor positions at ordinary times. Fortunately the weather is getting cooler now, it would have been even more difficult in the summer. How is the absorption effect now? Is the dry air still up to standard?
There is no reduction in dosage (it is said that business is very good now). I don’t do dry gas during the hottest time of the day, but the dry gas after taking off the clothes in the morning is still up to standard!
If cold reflux is used, the top temperature will be difficult to control, which will have a great impact on the fractionation operation! The temperature to absorb stable gasoline is too high, which will also have a big impact on its operation.
The friend on the fourth floor said it well. In addition, if the temperature is high, even if there is no liquid state, it will affect the distribution of light and heavy components of the gas, resulting in a significant increase in heavy components, especially components above carbon five. In time, the rich gas flow will not increase. Due to changes in the air intake components of the air compressor, the load of the air compressor will increase, the speed will decrease, etc. You can look at the design air intake composition of your air compressor.