Coke removal in vertical risers
US11148180B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Nov 20, 2019 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Feb 14, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10B33/006
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of removing an obstruction of coke built up in a riser of a fluid catalytic converter and of cleaning the riser involves using a suspended centralizer and narrowly angled nozzles for first hydroblasting a drainage orifice in the obstruction, adjusting guide arms and manipulating the suspended apparatus to allow enlargement of the orifice, further adjusting the guide arms and enlarging the angles of the nozzles to work the remaining coke built up.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.