Problem with poor heat exchange in the heat exchanger! Experts, please help! ! ! !
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Currently, there are three heat exchangers: the tube side carries the gas-water mixture after ammonia removal, while the shell side contains circulating water. After the ammonia is removed from the gas-water mixture, many substances dissolve out in the water, resulting in severe oil accumulation inside the heat exchangers. This has now significantly affected the heat exchange efficiency of these devices. The oil that is removed using steam cleaning is similar to asphalt and solidifies within seconds at room temperature. Dear experts, if anyone has any good ideas, please help out a lot! ! ! !
There is no other way; without removing the asphalt-like substances, heat exchangers cannot be used. Only gas or liquid can pass through the pipe.
The gas and water after deamination pass through two parallel filters (equipped with differential pressure gauges) before entering the heat exchanger; the filters are switched based on the differential pressure to facilitate cleaning.
It would be best to overhaul the entire process – is it possible to separate oil from water before it enters the heat exchanger? Or, multiple heat exchangers could be set up to be used in rotation for tasks such as heating and regeneration, purging, pressure equalization, parallel operation, switching, and pressure relief. Is it feasible to use a PLC to implement automatic control for this? For reference.
After cooling, the salts in the purified water and various oil-displacing agents present in the crude oil (such as polyacrylamide) experience a decrease in solubility and precipitate, which reduces the efficiency of heat exchange. It is possible to increase the backwashing process and carry out regular backwashing
Polishing is a good method, but gas and water are quite corrosive; the equipment is large, and filtering it in advance presents some difficulties
It’s a good approach, but the heat exchanger is quite large, with many baffles in the tube side, making backwashing difficult. I hope someone experienced can respond
It is also possible to consider using evaporative cooling to replace the heat exchanger, allowing it to be cleaned with a high-pressure water gun. Evaporative cooling can be designed in a tube-box format. If you’re interested, we can talk. 13562668600, Sun Quanquan
Would it be better to add a gas-liquid separator before the heat exchanger?
We are a high-tech enterprise specializing in online descaling and anti-scaling using physical methods; we can handle your situation. Further exchanges are welcome. shcsb11@163.com
It feels like coal tar; such a substance is not suitable for use in heat exchangers.