Title:
REGENERATIVE COMBUSTION TYPE COAL-BASED SHAFT FURNACE AND DIRECT REDUCTION PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/007001
Kind Code:
A1
Abstract:
A regenerative combustion type coal-based shaft furnace, where a combustion chamber (2) is provided with at least one set of combustion devices, each of which comprises a reversing valve (9), an air pipe (7), a smoke pipe (8), a first gas circulating pipe (5), and a second gas circulating pipe (6); the reversing valve has a first valve position and a second valve position; the first gas circulating pipe communicates with the air pipe and the second gas circulating pipe communicates with the smoke pipe when the reversing valve is at the first valve position, and the first gas circulating pipe communicates with the smoke pipe and the second gas circulating pipe communicates with the air pipe when the reversing valve is at the second valve position; the first gas circulating pipe and the second gas circulating pipe are each connected to a burner (3), and the burner is connected to a regenerative chamber (4). A direct reduction production method, where a burner provided inside a combustion chamber of an external heating type coal-based shaft furnace comprises two parts, i.e., part A and part B; when part A of the burner performs combustion work, part B of the burner is used for discharging smoke, and after a preset period of running, part A of the burner is used for discharging smoke and part B of the burner performs the combustion work. Such an alternation is periodically performed, so that a smoke flow field in the combustion chamber changes periodically and the temperature uniformity in the combustion chamber is improved.
Inventors:
FAN XIAOGANG (CN)
Application Number:
PCT/CN2017/117763
Publication Date:
January 10, 2019
Filing Date:
December 21, 2017
Export Citation:
Assignee:
WISDRI ENGINEERING & RES INCORPORATION LIMITED (CN)
International Classes:
C21B13/02; F27B1/00
Foreign References:
| CN107190116A | 2017-09-22 | |||
| CN102393140A | 2012-03-28 | |||
| CN106916599A | 2017-07-04 | |||
| CN1392385A | 2003-01-22 | |||
| JPS62288482A | 1987-12-15 |
Attorney, Agent or Firm:
HUBEI WUHAN YONGJIA PATENT AGENCY CO., LTD (CN)
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