Steam cycle efficiency improvement with pre-economizer
US9459005B2 · kind B2 · utility
0Cited by
5References
13Claims
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Key dates
| Filing date | Aug 25, 2011 |
| Grant date | Oct 4, 2016 |
| Priority date | — |
| Expiry date | Oct 26, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E20/12
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method for improving pulp mill steam cycle efficiency includes the steps of providing at least one deaerator tank having a first pressure, and lowering the pressure of said deaerator tank to a second pressure. Feedwater is supplied to a pre-economizer, where it is heated. The water is then delivered to at least one feedwater heater, where it is heated. The water is then delivered to an economizer. By this method boiler steam rate is increased while boiler efficiency is maintained and turbine extraction for deaerator and feedwater heating is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.