LATENT HEAT RECOVERY TYPE COMBUSTION DEVICE

To provide a latent heat recovery type combustion device capable of appropriately grasping consumption of a neutralizing agent and highly accurately informing a use limit of the neutralizing agent in a neutralizing device.SOLUTION: A neutralizing device is provided in a route of a drain passage discharging condensation water generated in a heat exchanger during combustion in a burner, and a latent heat recovery type combustion device includes an information control section Cb informing that, when an integrated value of a combustion heat amount equivalent value of the burner reaches a preset threshold value, a neutralizing agent of the neutralizing device reaches a use limit. The information control section Cb includes: a condensation water flow rate estimation section 32 estimating a flow rate of condensation water flowing in the drain passage on the basis of the combustion heat amount equivalent value; a combustion form acquisition section 37 acquiring combustion form information during burning in the burner; a correction value setting section 38 setting a correction value on the basis of at least one of the flow rate of the condensation water and the combustion form information; and a correction processing section 34 correcting the integrated value on the basis of the correction value.SELECTED DRAWING: Figure 4 【課題】中和剤の消費量を適正に把握して中和器の中和剤の使用限界を高精度で報知し得る潜熱回収式燃焼装置を提供する。【解決手段】バーナの燃焼時に熱交換器で発生した凝縮水を排出するドレン経路の経路中に中和器を備え、バーナの燃焼熱量相当値の積算値が予め設定された閾値に達した際に、中和器の中和剤が使用限界に達したことを報知する報知制御部Ｃｂを備えている。報知制御部Ｃｂが、燃焼熱量相当値に基づいてドレン経路を流れる凝縮水の流量を推定する凝縮水流量推定部３２と、バーナが燃焼する際の燃焼形態情報を取得する燃焼形態取得部３７と、凝縮水の流量及び燃焼形態情報の少なくとも一方に基づいて補正値を設定する補正値設定部３８と、補正値に基づいて積算値を補正する補正処理部３４とを備えた。【選択図】図４