riser reactor

The riser designed for our company's 600,000-ton catalytic unit is divided into two sections, the lower section is the pre-lift section, and the upper section is the feed and reaction section. The inner diameter of the pre-lifting section is φ1000mm, lined with 150mm heat-insulating and wear-resistant lining ； The inner diameter of the reaction section is φ1000mm, and it is lined with 100mm heat-insulating and wear-resistant lining. The feed of the riser reactor is equipped with a row of 6 SKH-4 high-efficiency atomizing nozzles, and the outlet adopts two sets of coarse cyclone separators.

What kind of riser reactor do you need? FDFCC? MIP? DCC? The riser of the MIP device has a secondary reaction capacity, which effectively controls the secondary reaction cracking and ensures that the octane number of the gasoline reduces the olefin content. Our device is also a MIP, but we only have a second reaction zone and no secret phase storage capacity. We just simply extend the reaction time. The structure of the riser is similar, including a pre-lift section, a feed reaction zone, and an outlet for coarse and fine rotation. Our riser has 2 sets of recycled gasoline nozzles, 6 sets of raw oil spray groups, 2 sets of cooling gasoline, and 2 sets of cooling water spray groups from bottom to top.

In fact, the riser tube has the simplest structure in catalysis, but it also has the greatest effect. Except that MIP has a big belly, the riser tubes of other processes are the same. There are two sections, the lower section is the pre-lift section and the upper section is the reaction section. The most common feed nozzles include raw material nozzles, refining oil slurry nozzles (generally mixed with raw materials before entering), refining oil nozzles, terminator nozzles, and quenching water nozzles (usually acidic water behind the air compressor). The type and quantity of nozzles can be selected according to the actual situation. The nozzles must be arranged symmetrically. The outlet should be coarsely rotated, and then the single-stage catalyst inlet can be directly connected to the regenerator according to the process conditions, or it can also be connected to an external heat source. In terms of lining, it is heat-insulating and wear-resistant. In the past, it was double-layered. But now there seems to be a push for single-layer lining. (According to experts, there is not much difference in the effect between the two) But single layer is obviously much more convenient and requires less investment. During the manufacturing process, the riser tube is generally divided into 1-2M small sections.