Demulsifier information
Thread Content
Which colleague is familiar with crude oil demulsifiers? We have a vacuum distillation unit with a capacity of 1.5 million tons, which was put into operation just 3 months ago. The crude oil electrodialysis system has only become stable after two months of adjustments. Now we would like to investigate whether the type, concentration, and operating parameters of the demulsifiers used are appropriate, but we lack sufficient information; we hope to receive professional guidance.
We also use electrodialysis; whatever you need, let’s work on it together
Shenzhen Xincheng’s demulsifier XDC-8, with a pH of 6.5–8, is used in an amount of 20–30 PPM based on the volume of material to be treated. The operating temperature is 110–135°C, the water flow rate is 16 T/H, and the pressure is 1.0–1.3 MPA. That’s roughly all there is to it. It has been in use for over 3 years now, and it remains relatively stable.
Demulsifiers are an important means for separating oil from water in electrodesalination units. Currently, demulsifiers used fall into two categories: oil-soluble and water-soluble. Each type of demulsifier has limited applicability and can only be used with certain types of crude oil; therefore, when the type of crude oil being processed changes, the previously used demulsifier may need to be replaced. The main components of emulsifiers currently in use are high-molecular weight condensates such as phenolics, phenamines, dioxyethane, and polyoxypropane; in addition, they contain small amounts of desalination aids or flocculants that help to clarify the desalted water. In the electrodesalination process, it is necessary to select a demulsifier with good performance; in addition, process parameters such as the electrodesalination temperature, the location where the demulsifier is injected, the amount of water injected, the method of water injection, and the mixing intensity are all key factors that affect the efficiency of the electrodesalination unit. Currently, crude oil being processed is becoming increasingly heavy and of lower quality; as a result, the electrical desalination unit in vacuum distillation units has become increasingly important. It not only plays a key role in preventing corrosion in the processes of these units but also affects the long-term operation of subsequent processing units such as catalytic cracking units.