Technique of separating fine particulates from gas steam
A technology of airflow and particles, which is applied in the direction of separation methods, separation of dispersed particles, and devices with the axial direction of the swirl flow unchanged, which can solve problems such as poor performance and poor prediction
Inactive Publication Date: 2006-12-06
UOP LLC
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In fact, certain designs that are supposed to mitigate non-uniform flow patterns and limit vortex formation in principle performed very poorly in laboratory tests
In some cases, even sophisticated fluid dynamics computer software was found to be a poor predictor of TTS separation efficiency
Method used
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Experimental program
Comparison scheme
Effect test
example 8-12
[0038] The test was carried out by placing the cyclone separator of the present invention in a cyclone having a horizontal base for enclosing the bottom end of the cyclone body. According to the description of the invention, in this case solid particles are discharged from the inlet air of the cyclone through the orifices made in the side wall of the cyclone cylinder. The design of the present invention is realized by making two rectangular slots with a length of 90 mm and a width of 10 mm. The length direction of the slot is parallel to the axis of the cyclone cylinder body, and the width dimension of the lower part is close to the horizontal base near the bottom of the cyclone body. Parameter conditions such as intake flow rate, particle size, and average particle diameter were kept within the ranges set in the comparative example. In addition, studies were performed with underflow values of 1% to 3% by volume. The same performance metrics are also calculated and listed ...
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Abstract
The present invention relates to a cyclone separator for use between an upper (102) and a lower tube sheet (104), the cyclone (100) comprising: a substantially vertical cyclone body (106) having a closed bottom end (108) and a top end (110) fixed with respect to the upper tube sheet (102), the cyclone body (106) defining a feed gas inlet (112) at its top end (110), the feed gas inlet (112) extending above the upper tube sheet (102) for receiving a particle-contaminated gas stream therefrom, the cyclone body (106) further defining a sidewall of the cyclone body, the sidewall defining a plurality of discharge openings (114) located between the upper (102) and the lower tube sheets (104) for discharging particles and a minor amount of an underflow gas stream; one or more swirl vanes (116) located proximate the gas inlet (112) to induce centripetal acceleration of the particle-contaminated gas stream; a gas outlet tube (118) defining a clean gas inlet (120) end located centrally within the cyclone body (106) for receiving a purified gas stream and further defining a clean gas outlet (122) located below the lower tube sheet (104) for discharging the purified gas stream, the gas outlet tube (118) extending through the closed bottom end (108) of the cyclone body (106) and further extending through the lower tube sheet (108).
Description
technical field [0001] This invention relates to a new type of cyclone separator for removing fine solid particles from an air stream. The separator is particularly suitable for use in tertiary separation plants, which are typically used to clean up flue gas streams containing catalyst fines exiting refinery fluid catalytic cracking (FCC) catalyst regenerators. Background technique [0002] Particulate emissions in industrial air streams must be strictly controlled in accordance with regulations issued by federal, state, and local governments to reduce pollutant emissions. In the engineering field of refining petroleum, the main point of concern with particulate emissions is the flue gas exiting the catalyst regenerator section of a fluid catalytic cracking (FCC) unit. The current U.S. federal regulations limit the particle size to 1 kg of solid particles per 1000 kg of coke burned in the catalyst regenerator, or equivalent to about 80-110 mg / Nm 3 The particle concentratio...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B04C3/06B04C3/04B01D45/14
CPCB01D45/14B04C3/04B04C3/06B04C2003/006
Inventor 保罗・A・西克里斯特布赖恩・W・赫德里克
Owner UOP LLC