Recently, a new type of defoaming agent was successfully trialed in the butadiene unit of Sinopec Corp., which effectively solved the problems of low production load, low operating flexibility, and frequent fluctuations of differential pressure in the extraction system, and achieved significant efficiency gains. This new defoaming agent is also the first industrial application of domestic acetonitrile butadiene plant. This article is written by Shanghai Wuyue Pump and Valve Manufacturing Co., Ltd. Assist in reprinting and sharing. Shanghai Wuyue is a professional safety valve manufacturer. It mainly produces various types of air compressor safety valves and fluorine-lined safety valves, and provides related product technical support to users for life.
(Jiangxi New Materials Co., Ltd.)
During the Spring Festival this year, the butadiene unit experienced production fluctuations. The pressure difference in the first extractive distillation tower reached as high as 80 kPa. The system was difficult to maintain stable operation, and the unit load dropped to 80%. Through technical analysis and reference to the experience of similar domestic devices, it was found that the solvent in the extraction system has a certain foaming tendency, which has an impact on the operation. The device plans to introduce a new defoaming agent into the extraction system to reduce the system pressure difference and increase the device load.
The brand name of the new defoaming agent being tried this time is 23Y4220. It is a proprietary technology defoaming agent of GE (United States General Water Treatment) Company with siloxane as the skeleton and other components such as block copolymers. , suitable for acetonitrile method, etc. using water as co-solvent, high dispersibility, resistant to strong alkaline environment, good dispersion, and has the combined effect of defoaming and suppressing foam.
After a week of trial, the system is running stably, the tower pressure difference is stable, the liquid level is stable, the operating margin is increased, the product quality is excellent, and it will not affect the subsequent system and emission indicators. The device’s capacity to handle mixed C4 has increased from 620 tons/day to 700 tons/day, the load has increased to 90%, and the pressure difference has dropped to 65 kPa. Coinciding with the rising market price of butadiene products, the device can contribute more to the company every day The benefit is more than 200,000 yuan.
