OPERATIONAL METHOD OF WASTE GASIFICATION MELTING FURNACE

• Main Authors: ISHIDA YOSHIHIRO, TARUKADO TAKUMI, NAMA MIZUKI, TAKADA JUNICHI, YOSHIMOTO NAOKO, TANAKA HIROKAZU
• Format: Patent
• Language: English; Japanese
• Published: 09.02.2017
• Subjects: AIR SUPPLY; BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONSUMING WASTE PRODUCTS BY COMBUSTION; CREMATION FURNACES; DRAUGHT-INDUCING; FLUES; HEATING; LIGHTING; MECHANICAL ENGINEERING; REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS; WEAPONS

PROBLEM TO BE SOLVED: To provide an operational method of a waste gasification melting furnace capable of sufficiently suppressing increase of coke to be introduced into the furnace in a case of operation that an open hole for discharging molten material is steady opened, capable of maintaining a state where a coke bed having sufficiently uniform thickness is formed on a furnace bottom, and capable of sufficiently preventing the open hole from being closed due to temperature drop of the molten material at the open hole and around its surroundings.SOLUTION: This invention relates to an operational method of a waste gasification melting furnace including: a melting furnace part positioned on a furnace bottom side; a plurality of tuyeres configured to supply oxygen into the melting furnace part; an open hole formed on the melting furnace part; a pressure holding chamber having an internal space communicating with the open hole. The operational method is characterized in that an amount So oxygen supplied from a tuyere closest to the open hole into the melting furnace part per unit time is made smaller than an amount Sof oxygen supplied from a tuyere farther from the open hole compared to the above tuyere into the melting furnace part per unit time.SELECTED DRAWING: Figure 2 【課題】溶融物排出用の貫通孔を定常的に開放して操業する場合において、炉内に導入すべきコークスの増加を十分に抑制できるとともに厚さが十分に均一のコークスベッドが炉底に形成された状態を維持でき、なおかつ、貫通孔及びその周辺における溶融物の温度低下に起因して貫通孔が閉塞されることを十分に抑制できる廃棄物ガス化溶融炉の運転方法を提供する。【解決手段】本発明は、炉底側に位置する溶融炉部と、溶融炉部内に酸素を供給する複数の羽口と、溶融炉部に形成された貫通孔と、貫通孔と連通する内部空間を有する保圧室とを備える廃棄物ガス化溶融炉の運転方法に関する。この運転方法は、貫通孔の最も近くにある羽口から溶融炉部内に単位時間あたりに供給する酸素量ＳＮを、当該羽口よりも貫通孔からの距離が遠い羽口から溶融炉部内に単位時間あたりに供給する酸素量ＳＦよりも少なくすることを特徴とする。【選択図】図２