Deep desulfurization system and method for circulating fluidized bed boiler
A circulating fluidized bed and deep desulfurization technology, applied in the chemical industry, can solve the problems of CFB boiler environmental protection pressure and environmental protection cost increase, difficult to achieve, etc.
Pending Publication Date: 2022-02-11
TSINGHUA UNIV +1
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Problems solved by technology
In recent years, with the continuous stringent environmental protection standards in my country, the release of new air pollutant emission standards and the implementation of ultra-low emission requirements, most regions in China require all coal-fired units to implement SO 2 Emission concentrations are not higher than 35mg / m 3 The ultra-low emission requirements of CFB boilers also increase the environmental protection pressure and environmental protection costs. It is difficult to achieve SO2 only through desulfurization in the furnace 2 Ultra-Low Emission Requirements
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[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0037] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner" and "outer" are based on those shown in the accompanying drawings. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specifi...
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The invention discloses a deep desulfurization system and method for a circulating fluidized bed boiler. The system comprises a circulating fluidized bed boiler, an electric dust remover, a semi-dry desulfurization tower, a bag-type dust remover and an automatic control unit which are sequentially connected. The automatic control unit can adjust the feed amount of a desulfurizer in a furnace, the feed amount of a desulfurizer out of the furnace, and the feed amount of spraying water in real time according to the detection data of an in-furnace temperature detection device, a first flue gas component detection device, an in-tower temperature detection device, and a second flue gas component detection device, and theoretical data including coal fuel parameters of a circulating fluidized bed boiler, operation load of the circulating fluidized bed boiler, preset purified flue gas quality, and preset semi-dry method desulfurizing tower working temperature. By adopting the system, the change of coal fuel as fired can be quickly adapted, the overall consumption of a desulfurizer is greatly reduced, the desulfurization efficiency and effect are improved, and economic operation and ultra-low sulfur emission of system desulfurization are realized.
Description
technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a deep desulfurization system and method for a circulating fluidized bed boiler. Background technique [0002] Circulating fluidized bed (CFB) technology is a clean combustion technology with wide fuel adaptability, low temperature enhanced combustion, low pollution control cost and large load adjustment range. It has developed rapidly in my country in recent decades, especially in low calorific value In fuel utilization, CFB combustion technology has unparalleled advantages. By adding limestone with a certain particle size into the furnace of the CFB boiler, the SO 2 The effective desulfurization efficiency of the CFB boiler can exceed 80% at a suitable furnace temperature. In recent years, with the continuous stringent environmental protection standards in my country, the release of new air pollutant emission standards and the implementation of ultra-low emission r...
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IPC IPC(8): B01D53/80B01D53/50B03C1/30F23J15/02F23J15/04
CPCB01D53/80B01D53/504B03C1/30F23J15/025F23J15/04F23J2215/20F23J2217/102F23J2217/50F23J2217/104B01D2258/0283
Inventor周托刘青李怡然
OwnerTSINGHUA UNIV