Coaxial heat transfer tube suitable for a fluidized bed boiler and a method for manufacturing same
US11859911B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2019 |
| Grant date | Jan 2, 2024 |
| Priority date | — |
| Expiry date | Mar 19, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22B37/108
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A coaxial heat transfer tube (100), comprising a first inner heat transfer tube (110) having straight parts (111, 113, 115, 117) and curved parts (112, 114, 116), a first outer heat transfer tube (120) having straight parts (121, 123, 125, 127) and curved parts (122, 124, 126). The first outer heat transfer tube (120) radially surrounds the first inner heat transfer tube (110) at least within the first primary straight part (121) and the first primary curved part (122). Thermally insulating material (530) has been provided in between a curved part (122) of the first outer heat transfer tube (120) and a curved part (112) of the first inner heat transfer tube (110). Neither straight part (121) nor a curved part (122) of the first outer heat transfer tube (120) comprises a longitudinal seam. A method for making a coaxial heat transfer tube (100).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.