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Cyclone separating device

A cyclone separator and solid separation technology, which is applied to cyclone devices, devices whose axial directions of cyclones can be reversed, etc., can solve the problems of aggravating boiler ash collection, waste of energy, and high catalyst concentration, so as to save renovation costs, Easy installation and piping, good anti-wear performance

Active Publication Date: 2010-06-09
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment

[0034] The three-rotor dust exhaust system of a fluidized catalytic cracking unit in a petrochemical plant needs to add a four-rotor with a diameter of 800 mm for the separation, recovery and discharge of spent catalyst fine powder. The effective space from the bottom of the three-rotation to the top of the middle fine powder tank is 1.8 meters, the operating temperature is 550~600°C, and the curved cone four-rotation is used. According to the size of the plane space that can be used for the four-rotation, there are two piping layout schemes, see Figure 4 and Figure 5 :

[0035] Figure 5 It is a big bend pipe system scheme, and the pipes will occupy more places and spaces. The calculation and layout of the thermal expansion stress of the pipe system are more troublesome, but the service life is long and the operation is safe. The four-rotation system can be safely operated for more than 10 years. It can be used when the four-rotation plane has a large space.

[0036] ...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B04C5/08B04C5/04B04C5/085
Inventor 闫涛张荣克戴敏王芳冯清晓范声黄勇力戴建华
Owner SINOPEC ENG
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