When the methanol content in the low-temperature methanol wash is too high, it is introduced into the pre-washing system via that pipeline for dehydration

The methanol regeneration tower is connected directly to steam; the desalinated water fed into the regeneration tower is stopped from flowing in, and regular analyses are carried out on the discharged waste streams. This is exactly how the problem at Hubei Shuanghuan was addressed

Regularly analyze the water content at the top of the alcohol-water separation tower; by appropriately controlling the reflux at the tower top, the water content in the system can be reduced. This is the case when the steam and feed are constant

Increase the steam supply to the methanol-water separation tower, and at the same time increase the reflux from the regeneration tower to the methanol-water separation tower!

Reply to 2# poplpopl: Could you be more detailed? Bro, thanks a lot

The answers from the above individuals are a bit hard to understand; I’m not sure what kind of process it is In our Luchi process, the methanol used for pre-washing is obtained from methanol washed with hydrogen sulfide. If the water content in the methanol in the thermal regeneration tower is high, it is necessary to increase the amount of pre-washed methanol accordingly, while also adjusting the operation of the extractor, increasing the flow rate to the azeotrope tower and to the water separation tower, and paying attention to controlling the temperatures at the bottom and top of the towers. By increasing the pre-washing volume, it is possible to appropriately increase the absorption of methanol in the hydrogen sulfide concentration tower, as the gas-phase load increases due to the enhanced pre-washing, thereby preventing the hydrogen sulfide level from exceeding limits.