The invention discloses a low-load stable-
combustion boiler
combustor which comprises
combustor bodies and a
hearth. The
combustor body comprises a shell, a secondary air
pipe arranged in the center of the shell, a primary air
pipe surrounding the two sides of the secondary air
pipe, a
biomass fuel pipe tightly attached to the inner wall of the shell, and the combustor bodies are arranged on the four corners of the
hearth. The invention further discloses a
combustion method of the low-load stable-
combustion boiler combustor. During full-load combustion of the
hearth, a
biomass fuel inlet is closed, only pulverized
coal combustion is adopted for hearth combustion,
biomass combustion is not adopted, and hearth
slag is relieved. During low-load operation, pulverized
coal entering the hearth is reduced, the temperature of the hearth is reduced,
flame combustion is unstable, in order to ensure stable combustion, the biomass fuel inlet is opened for feeding biomass fuel, and it is ensured that
flame combustion is stable by means of the characteristics that biomass is high in volatile component, easy to ignite and good in heating value.