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本文就高原地区气压降低情况下锅炉的热力计算进行了理论分析,得出如下结论: 1.由于气压降低,炉内介质黑度α_φ下降了。但无论按苏联73年热力计算标准还是苏联57年热力计算标准,算出的炉内介质黑度α_φ,均大于苏联联合通报规定的对于S≥2.5米的煤粉炉α_φ=α_(cβ)=0.8之规定。所以我们仍然取α_φ=α_(cβ)=0.8。2.气压降低对烟气对管壁的对流放热
In this paper, a theoretical analysis of the boiler's thermal calculation under the condition of reduced pressure in the plateau is made. The conclusions are as follows: 1. The blackness of the furnace α_φ is decreased due to the decrease of the pressure. However, the calculated blackness α_φ of the medium in the furnace is larger than the α_φ = α_ (cβ) = 0.8 for the pulverized coal furnace with S≥2.5 m according to the Soviet Union's joint notification whether it is calculated by the Soviet thermal calculation standard of 73 years or the thermal calculation standard of the Soviet Union for 57 years The provisions. So we still take α_φ = α_ (cβ) = 0.8.2. Reducing the pressure of convection of flue gas on the pipe wall