Pulverized coal burner and pulverized coal boiler having it

US8950345B2 · kind B2 · utility

Assignee

• YANTAI LONGYUAN POWER TECHNOLOGY CO., LTD. · CN

Inventors

• Yupeng Wang · Fanling, CN
• Hong Tang · Cincinnati, US
• Yuwang Miao · Shandong, CN
• Wucheng Liu · Fanling, CN
• Jingwu Zhang · San Jose, US
• Yubin Zhang · Longbeilingcun, CN
• Shuweng Sun · Fanling, CN
• Xingyuan Cui · Fanling, CN
• Xixin Yang · Fanling, CN
• Xinguang Wang · Fanling, CN
• Zeru Gong · Yantai, CN
• Lei Yi · Xi'an, CN
• Yingtao Wang · Beijing, CN

Key dates

• Filing date: Apr 26, 2011
• Grant date: Feb 10, 2015
• Expiry date: Dec 22, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23D2201/20
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A pulverized coal burner and a pulverized coal boiler. The coal burner comprises a primary air cylinder (111) and a pulverized coal concentration device (112). The coal concentration device (112) makes the concentration of the coal flow gradually decrease from inside to outside along the radial direction, with respect to an axis (100) of the primary air cylinder (111). The coal burner further comprises a coal separating cylinder (113) and a coal guiding cylinder (114) located downstream of the device (112), the rear end of the cylinder (113) is connected with the front end of the coal guiding cylinder (114). The outlet of the cylinder (114) has a conical expansion portion (1141). The coal burner further comprises a divergent nozzle (115) connected with the rear end of the primary air cylinder (111) and whose cross-sectional area gradually increases along the flow direction of the coal flow.