Boiler furnace
Abstract
Abstract Translated from Japanese (57)【要約】 【目的】 発電事業用等の微粉炭焚きボイラ火炉におい て、NO x 発生量を増加させることなく、灰中の未燃分 を大幅に減少させること。 【構成】 AA(アディショナルエア)を用途別に3段 に分けて使用する。すなわち、下段AA(7)ポート は、未燃分低減を目的として、最上段バーナよりもバー ナ1段分程度上方に設置する。中段AA(8)は、NO x 低減を目的とし、従来のAA投入法と同様、最上段バ ーナの上方に離して投入して、バーナ部(3)の上方に 十分な大きさのNO x 還元域を形成させる。上段AA (9)は、未燃分低減(燃焼完結)を目的とし、デ・ア ーチ部(2)の炉幅方向に沿う数か所に投入して混合・ 拡散を促進する。 (57) [Summary] [Purpose] To significantly reduce the unburned content in ash in a pulverized coal-fired boiler furnace for power generation, etc., without increasing the amount of NO x produced. [Structure] AA (additional air) is used in three stages according to the application. That is, the lower AA (7) port is installed about one stage higher than the uppermost burner for the purpose of reducing unburned components. Middle AA (8) is NO the purpose of x reduction, as in the conventional AA-on method, and put away above the uppermost stage burner, to form the NO x reduction area large enough above the burner unit (3). Upper AA (9) aims to reduce the unburned content (combustion completion), and is charged by mixing at several points along the furnace width direction of the de-arch section (2) and mixing / Promote diffusion.
Inventors
- 👤 Akiyasu Okamoto
- 👤 章泰 岡元
Bibliographic Details
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