Process of the oil and gas cooling system at the top of the catalytic fractionation tower
Thread Content
The flow pattern of the oil and gas cooling system at the top of the catalytic fractionation tower consists of an oil and gas-heat coal water exchanger, followed by air cooling of the oil and gas, and finally water cooling of the same; all these steps are in series with no bypass circuits provided. What is the reason for this?
In the oil and gas cooling system at the top of the catalytic fractionation tower, multi-stage cooling is achieved through a series of oil and gas-heat coal water exchangers, oil and gas air cooling, and oil and gas water cooling, which effectively reduces the temperature of the oil and gas and prevents damage to equipment and products caused by high temperatures. At the same time, such a process design can also make the most of waste heat, reduce energy consumption costs, and improve production efficiency. Therefore, it is reasonable not to install a bypass, as it would lead to energy waste and process instability. .
When it’s inevitable that the equipment will stop functioning properly, having a bypass in place prevents all the equipment along the heat exchange circuit from being shut down. Is it feasible to consider using a bypass for this purpose?
It is pointless to set up a bypass; when using the bypass, the temperature of the rich gas does not drop, which has a significant impact on the compressor； When there is a problem with the cooling equipment, simply stop production to fix it.
Without a bypass, problems arise: there is leakage during cold exchange, and when repairs are needed, a long section of the system has to be shut down, which affects the after-cooling process； A bypass was added later; the unit that leaks is disconnected, so it doesn’t have a significant impact on production
Multiple sets are usually installed; if one set fails, it can be removed entirely while the other sets continue to operate normally. If the temperature of the gas at the compressor inlet is too high and cannot be reduced through cooling, the load on the device can be lowered by reducing the volume of gas flow, thereby lowering the temperature of the gas at the compressor inlet and avoiding the need to shut down the cooler for cooling purposes. Furthermore, preventive maintenance should be carried out on cold exchange equipment, and it should be replaced ahead of its expected lifespan. One shouldn’t be reluctant to discard it just because it still seems in good condition, as leaks that occur during use can affect production.
There is no need to install a bypass for regulating circulating water or air cooling