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Oxygen trim control on a multi-zone steel re-heating furnace. A demonstration at Roundwood 11`` Mill, Rotherham Engineering Steels Ltd. [Rotherham (GB)]

Miscellaneous:

Abstract

The Roundwood 11`` Mill, Rotherham Engineering Steels Ltd., produces bar by re-heating steel billets in a walking beam type furnace with a designed continuous throughput capacity of 110 t/h. The furnace has six independently controlled zones and is fired by interruptible natural gas, with heavy fuel oil used as an alternative. To improve the efficiency of fuel use, five zirconia-based oxygen measuring probes, have been installed in the roof of the furnace. These continuously monitor the oxygen concentration of the combustion products in each of the upper furnace zones. In the heating zone the measured value is used to trim the air/fuel ratio for the burners to produce the desired oxygen level. This report presents the results of an independent assessment of the air/fuel ratio control technique in terms of furnace energy use and operating procedures compared with the conventional method of control. The total cost of the project was 26,572 pounds. An annual fuel saving of 15,300 GJ has been realised, with a total reduction in operating costs, including reduced maintenance requirements, of 31,000 pounds/year. This equates to a recovery of the project costs in about 10 months. (author).
Publication Date:
Feb 01, 1991
Product Type:
Miscellaneous
Report Number:
GB-401; NP-15
Reference Number:
SCA: 320303; 360101; 421000; PA: GB-91:052668; SN: 92000649670
Resource Relation:
Other Information: DN: New Practice final report produced under the Best Practice programme for the for the Energy Technology Support Unit, Harwell (GB).; PBD: Feb 1991
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; 42 ENGINEERING; FURNACES; FUEL-AIR RATIO; METAL INDUSTRY; STEELS; ENERGY EFFICIENCY; DEMONSTRATION PLANTS; ECONOMICS; OXYGEN METERS; ZIRCONIUM OXIDES; 320303; 360101; 421000; EQUIPMENT AND PROCESSES; PREPARATION AND FABRICATION; COMBUSTION SYSTEMS
OSTI ID:
10115050
Research Organizations:
Department of Energy, London (United Kingdom). Energy Efficiency Office; British Steel plc, Rotherham (United Kingdom). Technical Swinden Labs.
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Other: ON: DE92761614; TRN: GB9152668
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
GB
Size:
33 p.
Announcement Date:
Jun 30, 2005

Miscellaneous:

Citation Formats

None. Oxygen trim control on a multi-zone steel re-heating furnace. A demonstration at Roundwood 11`` Mill, Rotherham Engineering Steels Ltd. [Rotherham (GB)]. United Kingdom: N. p., 1991. Web.
None. Oxygen trim control on a multi-zone steel re-heating furnace. A demonstration at Roundwood 11`` Mill, Rotherham Engineering Steels Ltd. [Rotherham (GB)]. United Kingdom.
None. 1991. "Oxygen trim control on a multi-zone steel re-heating furnace. A demonstration at Roundwood 11`` Mill, Rotherham Engineering Steels Ltd. [Rotherham (GB)]." United Kingdom.
@misc{etde_10115050,
title = {Oxygen trim control on a multi-zone steel re-heating furnace. A demonstration at Roundwood 11`` Mill, Rotherham Engineering Steels Ltd. [Rotherham (GB)]}
author = {None}
abstractNote = {The Roundwood 11`` Mill, Rotherham Engineering Steels Ltd., produces bar by re-heating steel billets in a walking beam type furnace with a designed continuous throughput capacity of 110 t/h. The furnace has six independently controlled zones and is fired by interruptible natural gas, with heavy fuel oil used as an alternative. To improve the efficiency of fuel use, five zirconia-based oxygen measuring probes, have been installed in the roof of the furnace. These continuously monitor the oxygen concentration of the combustion products in each of the upper furnace zones. In the heating zone the measured value is used to trim the air/fuel ratio for the burners to produce the desired oxygen level. This report presents the results of an independent assessment of the air/fuel ratio control technique in terms of furnace energy use and operating procedures compared with the conventional method of control. The total cost of the project was 26,572 pounds. An annual fuel saving of 15,300 GJ has been realised, with a total reduction in operating costs, including reduced maintenance requirements, of 31,000 pounds/year. This equates to a recovery of the project costs in about 10 months. (author).}
place = {United Kingdom}
year = {1991}
month = {Feb}
}