Cyclone separating device

Abstract

The invention discloses a cyclone separator used for gas-solid or liquid-solid separation, comprising a gas riser, an air outlet, an air inlet, a straight cylinder section, a separation deposition cone section, a dust outlet, and a wearable layer. The cyclone separator is characterized in that the separation deposition cone section adopts a bent cone structure; the axis line track of the bent conestructure is an arc or an ellipse or other smooth transition curved lines. The cyclone separator is mainly used for the separation, recycling and exhaust of the wasted catalyst fine powders in the fourth-class cyclone separation system of a petroleum chemical fluid catalytic cracking device. The cyclone separator with the bent cone structure has installation height which is only one third of theinstallation height of a vertical cyclone separator, and is applicable to the design and reconstruction of devices with equipment installation space to be restricted; meanwhile, the bent-cone typed cyclone separator has simple structure, large wind disposal quantity and high efficiency; furthermore, as the liner material with high wearability is adopted, the cyclone separator of the invention canbe used under high temperature for a long time.

Description

technical field [0001] The invention belongs to the field of cyclone separation used for gas-solid or liquid-solid separation in petrochemical industry, and more specifically relates to a cyclone separator mainly used in petrochemical fluid catalytic cracking device. Background technique [0002] Fluid catalytic cracking unit is an important crude oil secondary processing unit in oil refining and petrochemical plants. At present, there are more than 100 sets of fluid catalytic cracking units of various scales in operation in my country. Fluid catalytic cracking unit has not only created huge economic benefits for refineries and petrochemical plants, but also is a major source of ambient air pollution. For a fluid catalytic cracking unit with a processing capacity of 1 million tons per year, if the flue gas discharged from the regenerator is not separated and recycled, the concentration of flue gas dust will reach 0.6~1.0g / Nm3, and about 2 tons of 5 ~20μm fine powder is sent...

AI Technical Summary

Problems solved by technology

The amount of exhaust air under the three-rotation dust exhaust accounts for 3-5% of the total gas volume of the three-rotation. If it directly enters the waste heat boiler without four-rotation treatment, it will intensify the ash collection of the boiler and reduce the heat transfer effect of the boiler; if it is directly discharged into the chimney, it will be wasteful. energy

(2) High catalyst concentration

However, the disadvantage of this four-rotation system is that it is often difficult or difficult to renovate medium and small fluidized catalytic cracking units in old plants due to the need to occupy a certain amount of new ground and space, and the investment is relatively large

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