OPERATION METHOD OF BOILER, AND BOILER EQUIPMENT

• Main Authors: AKIYAMA KATSUYA, MATSUMIYA TOMOAKI
• Format: Patent
• Language: English; Japanese
• Published: 26.10.2017
• Subjects: AIR; BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; FEEDING FUEL TO COMBUSTION APPARATUS; HEATING; LIGHTING; MECHANICAL ENGINEERING; METHODSOR APPARATUS FOR COMBUSTION USING FLUID FUELOR SOLID FUEL SUSPENDED IN; REGULATING OR CONTROLLING COMBUSTION; WEAPONS

PROBLEM TO BE SOLVED: To provide an operation method of a boiler capable of suppressing degradation of a heat absorption ratio of a furnace.SOLUTION: An operation method of a boiler is the operation method of the boiler for mixing and burning a plurality of kinds of solid fuels, and includes a process for acquiring a content of ash in the plurality of kinds of solid fuels, and a specific surface area after incineration, of the plurality of kinds of solid fuels, and a process for determining a mixing ratio of the plurality of kinds of solid fuels so that the specific surface area after incineration of the entire mixture of the plurality of kinds of solid fuels becomes a reference value or less, on the basis the content of the ash and the specific surface area after incineration of each of the plurality of kinds of solid fuels obtained in the acquiring process. The reference value is preferably 5.5 m/g. As the solid fuel, coal is preferred.SELECTED DRAWING: Figure 1 【課題】本発明は、火炉の収熱率の低下を抑制できるボイラーの運転方法を提供することを課題とする。【解決手段】本発明に係るボイラーの運転方法は、複数種類の固体燃料を混合して燃焼させるボイラーの運転方法であって、上記複数種類の固体燃料中の灰分の含有率及び上記複数種類の固体燃料の灰化後の比表面積を取得する工程と、上記取得工程で得られた上記複数種類の固体燃料それぞれの上記灰分の含有率及び上記灰化後の比表面積に基づき、上記複数種類の固体燃料の混合体全体の灰化後の比表面積が基準値以下となるよう上記複数種類の固体燃料の混合割合を決定する工程とを備えることを特徴とする。上記基準値としては５．５ｍ２／ｇが好ましい。上記固体燃料が石炭であるとよい。【選択図】図１