STOKER TYPE INCINERATOR AND INCINERATOR

• Main Authors: HAMA TOSHIO, SHIRAISHI YUJI, SAJIKI KAZUYA, NAKATAYA NAOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 25.05.2017
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONSUMING WASTE PRODUCTS BY COMBUSTION; CREMATION FURNACES; HEATING; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

PROBLEM TO BE SOLVED: To promptly predict change of NOx concentration in exhaust gas.SOLUTION: An incinerator 1 includes: a primary combustion chamber 2 configured to supply primary air to wastes at each position of a conveyance route of the wastes conveyed by a plurality of fire grates to thereby combust the wastes; a secondary combustion chamber 3 configured to supply secondary air to unburned gas occurring in the primary combustion chamber 2 to thereby combust the unburned gas; and a discharge route 4 configured to guide exhaust gas discharged from the secondary combustion chamber 3 to atmosphere. A value of a target parameter group containing two or more of a flow rate of primary air, a temperature of primary air, a temperature in the primary combustion chamber 2, a flow rate of secondary air, a temperature in the secondary combustion chamber 3 and an oxygen concentration in the secondary combustion chamber 3 is acquired by a parameter value acquisition unit 5. At a NOx concentration predication unit 101, a predication value of a NOx concentration in exhaust gas is acquired based on the value of the target parameter group. Consequently, change of NOx concentration in exhaust gas can be predicted promptly.SELECTED DRAWING: Figure 1 【課題】排ガスのＮＯｘ濃度変化を素早く予測する。【解決手段】焼却炉１は、複数の火格子により搬送される廃棄物の搬送経路の各位置において廃棄物に対して一次空気を供給して廃棄物を燃焼させる一次燃焼室２と、一次燃焼室２で発生した未燃ガスに二次空気を供給して未燃ガスを燃焼させる二次燃焼室３と、二次燃焼室３から排出される排ガスを大気に導く排出経路４とを備える。一次空気の流量、一次空気の温度、一次燃焼室２内の温度、二次空気の流量、二次燃焼室３内の温度および二次燃焼室３内の酸素濃度のうちの２つ以上を含む対象パラメータ群の値がパラメータ値取得ユニット５により取得される。ＮＯｘ濃度予測部１０１では、対象パラメータ群の値に基づいて排ガスのＮＯｘ濃度の予測値が取得される。これにより、排ガスのＮＯｘ濃度変化を素早く予測することが可能となる。【選択図】図１