FUEL SUPPLY DEVICE AND FUEL SUPPLY METHOD

• Main Authors: NARISAWA MICHINORI, ICHIKAWA KODAI, IWAMOTO NORIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 08.12.2016
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; FEEDING FUEL TO COMBUSTION APPARATUS; HEATING; LIGHTING; MECHANICAL ENGINEERING; REGULATING OR CONTROLLING COMBUSTION; WEAPONS

PROBLEM TO BE SOLVED: To unify a distribution of a furnace temperature.SOLUTION: Constant feeding machines 8a-8e disposed at an outlet side of a measurement hopper 6 of a powder fuel 5 are connected to burners 4a-4e disposed on a combustion furnace 3 through transport pipes 13. When the powder fuel 5 is supplied to each of the burners 4a-4e, a control device 22 determines a weighting coefficient by dividing an average value by a present value of the temperature measured by temperature measurement means 21a-21e disposed at upper parts of the burners 4a-4e of the combustion furnace 3, and calculates control values of the constant feeding machines 8a-8e by multiplying the average value of the control values of the constant feeding machines 8a-8e to obtain a set value of the determined furnace supply fuel total value by the weighting coefficient. By giving the calculated control value to the constant feeding machines 8a-8e as a control command y, fuel supply amounts to the burners 4a-4e can be individually adjusted without changing the total amount of powder fuel 5 burned per a unit time.SELECTED DRAWING: Figure 1 【課題】 炉内温度分布の均一化を図る。【解決手段】 粉体燃料５の計量ホッパ６の出口側に設けた定量供給機８ａ〜８ｅは、燃焼炉３に設けられたバーナ４ａ〜４ｅに搬送配管１３を介して接続する。各バーナ４ａ〜４ｅに粉体燃料５の供給を行うときには、制御装置２２により、燃焼炉３の各バーナ４ａ〜４ｅの上方に設けた温度測定手段２１ａ〜２１ｅによって測定される温度の現在値で、それらの平均値を割って重み係数を求め、設定された炉内供給燃料合計値の設定値を得るための定量供給機８ａ〜８ｅの制御値の平均の値に、重み係数を掛けて各定量供給機８ａ〜８ｅの制御値を算出する。算出された制御値を各定量供給機８ａ〜８ｅへ制御指令ｙとして与えることで、単位時間あたりに燃焼させる粉体燃料５の総量は変えずに、各バーナ４ａ〜４ｅへの燃料供給量を個別に調整する。【選択図】図１