Once through sliding pressure steam generator
US4290389A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1979 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Sep 21, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22B29/10
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A once through steam generator (10) for sliding pressure operation from supercritical pressure at high loads into the subcritical range at low loads, having vertical tubes (14) lining the furnace (12) walls and passing their entire length without a mixing header. The furnace tubes are internally rifled and have orifices (47) associated with them to proportion the flow at full load. A steam separator (26) receiving effluent from the tubes sends steam to the superheater (70) and at low ratings returns water (32,40) to the tubes for recirculation therethrough. The tubes (14) are sized in accordance with a specified criteria based on the mass flow rate at full load, or on the ratio of friction drop to static head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.