FINES CAPTURE AND RECYCLE SYSTEM AND USES THEREOF

摘要

A cyclone system for a gasifier having two or more cyclones arranged in series. The cyclone system comprises a first stage cyclone, a first dipleg, a first loopseal, a second stage cyclone, a second dipleg, a combined dipleg, and a combined loopseal. The first stage cyclone has a first inlet and a first outlet. The first inlet is in fluid communication with the gasifier and receives a first gas-solid mixture from the gasifier. The first dipleg is connected to the first stage cyclone for collecting a first solid particle fraction separated from the first gas-solid mixture. The first loopseal is connected to the first dipleg for receiving the first solid particle fraction. The second stage cyclone has a second inlet and a second outlet. The second inlet is in fluid communication with the first outlet and receives a second gas-solid mixture from the first stage cyclone. The second dipleg is connected to the second stage cyclone for collecting a second solid particle fraction separated from the second gas-solid mixture. The combined dipleg is connected to both the first loopseal and the second dipleg. The combined loopseal is connected to the combined dipleg for receiving a mixture of the first and second solid particle fractions, and to the gasifier for feeding the mixture of the first and second solid particle fractions back to the gasifier. Also disclosed is a method for capturing and recycling fines with the cyclone system.