US 11,668,526 B2
Continuous horizontal-feeding preheating device and preheating enhancement method thereof
Qiming Huang, Chongqing (CN); Cunzhen Tan, Chongqing (CN); Weizhi Shi, Chongqing (CN); Yuchuan Zhang, Chongqing (CN); Zhan Gao, Chongqing (CN); Lei Al, Chongqing (CN); Chunting Liu, Chongqing (CN); Wei Lin, Chongqing (CN); and Chao Liu, Chongqing (CN)
Assigned to CISDI ENGINEERING CO., LTD, Chongqing (CN); and CISDI RESEARCH AND DEVELOPMENT CO., LTD., Chongqing (CN)
Appl. No. 16/649,966
Filed by CISDI ENGINEERING CO., LTD, Chongqing (CN); and CISDI RESEARCH AND DEVELOPMENT CO., LTD., Chongqing (CN)
PCT Filed Aug. 28, 2018, PCT No. PCT/CN2018/102726
§ 371(c)(1), (2) Date Mar. 23, 2020,
PCT Pub. No. WO2019/056930, PCT Pub. Date Mar. 28, 2019.
Claims priority of application No. 201710867653.3 (CN), filed on Sep. 22, 2017.
Prior Publication US 2020/0224972 A1, Jul. 16, 2020
Int. Cl. F27B 3/08 (2006.01); F27D 13/00 (2006.01); F27B 3/20 (2006.01); F27B 3/28 (2006.01); F27D 17/00 (2006.01); F27D 99/00 (2010.01)
CPC F27B 3/085 (2013.01) [F27D 13/002 (2013.01); F27B 3/205 (2013.01); F27B 3/28 (2013.01); F27D 17/003 (2013.01); F27D 99/0033 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A horizontal continuous feeding preheating device, comprising a horizontal continuous feeding preheating duct and an electric arc furnace, and wherein the horizontal continuous feeding preheating duct is provided with a first dust removal port and a second dust removal port at an interval along the material conveying direction, the first dust removal port is located behind a sealed feed inlet of the horizontal continuous feeding preheating duct and close to the sealed feed inlet, the second dust removal port is located at a rear section of the horizontal continuous feeding preheating duct and close to the feed inlet of the electric arc furnace; the first dust removal port is connected with a mixed flue gas pipeline, and the second dust removal port is connected with a hot flue gas pipeline; the mixed flue gas pipeline and the hot flue gas pipeline are connected with the settling chamber by a flue gas adjusting distributor and a flue; a first preheating area is formed by the horizontal continuous feeding preheating duct between the two dust removal ports, and a second preheating area is formed by the horizontal continuous feeding preheating duct between the second dust removal port and the feed inlet of the electric arc furnace; duct height of the first preheating area of the horizontal continuous feeding preheating duct is less than that of the second preheating area; the device includes a plurality of burners I obliquely installed in the first preheating zone and a plurality of burners II obliquely installed in the second preheating zone, wherein horizontal components of direction of combustion air flow of each burner I and each burner II are opposite to material conveying direction; the first dust removal port is set to ensure a constant negative pressure P1, and the second dust removal port is set to ensure a constant negative pressure P2.