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Decarbonization in thermal power industry is directly related to the realization of the “double carbon” target, while the circulating fluidized bed boiler has the advantages of wide fuel applicability and can carry out large-scale fuel blending. Biomass fuel is a renewable “zero-carbon” energy source, its blending can greatly reduce the carbon emissions of thermal power plants. Based on the existing circulating fluidized bed boilers and coal-fired conditions, biomass co-firing tests were conducted, and comprehensively evaluation was also carried out on combustion stability, pollutant emissions, and thermal efficiency. The co-firing experiments results showed that, as the co-firing ratio increased, the coal consumption rate per unit of steam production significantly decreased, with stable combustion conditions maintained throughout the process. Under co-firing conditions, the consumption of limestone decreased to approximately 4.5 kg for 1 ton steam production, with SO2 emissions meeting the standards. Blending raised the furnace temperature, elevated the exhaust temperature, increased the fly ash content, and slightly increased the heat loss. Through regulating the air volume ratio, material layer pressure difference and excess air coefficient, the overall thermal efficiency closely approached the design value. Under long-term operating conditions, the blending ratio of biomass reached about 30%, and the emissions of SO2 and NOx were qualified. The tail heat exchanger was not corroded obviously, and the CO2 emission reduction amount reached about 480 kg for 1 ton steam production.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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